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product structure silicon monolithic integrated circuit this product has no designed protec tion against radioactive rays . 1/28 ? 2015 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 ? 14 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 dc brushless motor drivers for fans multifunction single-phase full-wave fan motor driver BD69740FV description BD69740FV is a pre-driver that controls the moto r drive part composed of the power transistors. it incorporates current limiting circuit, lock protection and automatic restart circuit, pwm soft switching circuit, soft start circuit, and quick start circuit. the pin is compatible with bd69730fv (rotation speed pulse signal output). features ? pre-driver for external power transistors ? speed controllable by dc / direct pwm input ? pwm soft switching ? soft start ? quick start ? current limit ? lock protection and automatic restart ? lock alarm signal (al) output applications ? fan motors for general consumer equipment of desktop pc, and server, etc. package w(typ) x d(typ) x h(max) ssop-b16 5.00mm x 6.40mm x 1.35mm absolute maximum ratings parameter symbol rating unit supply voltage v cc 20 v power dissipation pd 0.87 (note 1) w operating temperature topr -40 to +105 c storage temperature tstg -55 to +150 c junction temperature tjmax 150 c high side output voltage v oh 36 v low side output voltage v ol 15 v low side output current i ol 10 ma lock alarm signal (al) output voltage v al 20 v lock alarm signal (al) output current i al 10 ma reference voltage (ref) output current i ref 12 ma hall bias (hb) output current i hb 12 ma input voltage (h+, h-, th, min, cs) v in 7 v (note 1) reduce by 7.0mw/ over 25 . (on 70.0mm70.0mm1.6mm glass epoxy board) caution: operating the ic over the absolute maximum ratings may damage the ic. the damage can either be a short circuit between pins or an open circuit between pins and the internal circuitry. therefore, it is import ant to consider circuit protection measures, such as adding a f use, in case the ic is operated over the absolute maximum ratings. ssop-b16 datashee t downloaded from: http:///
datasheet d a t a s h e e t 2/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 recommended operating conditions parameter symbol min typ max unit supply voltage v cc 4.3 12 17 v hall input voltage1 (more than vcc=9v) v h1 0 - 7 v hall input voltage2 (less than vcc=9v) v h2 0 - vcc-2 v hall signal level v hamp 100 - 500 mv operating input voltage (th, min) vin 0 - v ref v electrical characteristics (unless otherwise specified ta=25c, v cc =12v) parameter symbol min typ max unit conditions characteristics circuit current i cc 3 5 8 ma figure 1 hall input hysteresis voltage v hys 5 10 15 mv figure 2 high side output current i oh 9.0 12.0 16.5 ma v oh =12v figure 3 high side output leak current i ohl - - 10 a v oh =36v figure 4 low side output high voltage v olh 9.3 9.5 - v i ol =C5ma figure 5,6 low side output low voltage v oll - 0.5 0.7 v i ol =5ma figure 7,8 lock detection on time t on 0.20 0.30 0.45 s figure 9 lock detection off time t off 4.0 6.0 9.0 s figure 10 al output low voltage v all - - 0.3 v i al =5ma figure 11,12 al output leak current i all - - 10 a v al =17v figure 13 osc high voltage v osch 2.3 2.5 2.7 v figure 14 osc low voltage v oscl 0.8 1.0 1.2 v figure 14 osc charge current i cosc -55 -40 -25 a figure 15 osc discharge current i dosc 25 40 55 a figure 15 output on duty 1 p oh1 75 80 85 % v th =v ref x 0.26 h side pull up r=1k ? ,osc=470pf - output on duty 2 p oh2 45 50 55 % v th =v ref x 0.35 h side pull up r=1k ? ,osc=470pf - output on duty 3 p oh3 15 20 25 % v th =v ref x 0.44 h side pull up r=1k ? ,osc=470pf - reference voltage v ref 4.8 5.0 5.2 v i ref =-2ma figure 16,17 hall bias voltage v hb 1.10 1.26 1.50 v i hb =-2ma figure 18,19 current limit setting voltage v cl 120 150 180 mv figure 20 ss charge current i ss -300 -120 -50 na v ss =0v figure 21 th input bias current i th - - -0.2 a v th =0v figure 22 min input bias current i min - - -0.2 a v min =0v figure 23 cs input bias current i cs - - -0.2 a v cs =0v figure 24 about a current item, define the inflow cu rrent to ic as a positive notation, and the outflow current from ic as a negative not ation. truth table h; high, l; low, hi-z; high impedance al output is open-drain type. hall input ic output motor drive output h+ h- a1h a1l a2 h a2l out1 out2 h l hi-z h l l l h l h l l hi-z h h l motor state al rotating l locking hi-z downloaded from: http:///
datasheet d a t a s h e e t 3/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 reference data y va v [v] [] figure 1. circuit current vs supply voltage operating range 105c 25c -40c y va v [v] a y va v y [v] figure 2. hall input hysteres is voltage vs supply voltage operating range 105c 25c -40c 105c 25c -40c y va v [v] [] figure 3. high side output current vs supply voltage operating range 105c 25c -40c va v [v] a [] operating range figure 4. high side output lea k current vs output voltage 105c 25c -40c downloaded from: http:///
datasheet d a t a s h e e t 4/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 reference data - continued [] w va v [v] figure 5. low side output high voltage vs output source current (vcc=12v) 105c 25c -40c [] w va v [v] figure 6. low side output high voltage vs output source current (ta=25c) 17v 12v 4.3v [] w w va v [v] figure 7. low side output low voltage vs output sink current (vcc=12v) 105c 25c -40c [] w w va v [v] figure 8. low side output low voltage vs output sink current (ta=25c) 17v 12v 4.3v downloaded from: http:///
datasheet d a t a s h e e t 5/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 reference data - continued y va v [v] [] figure 9. lock detection on time vs supply voltage 105c 25c -40c operating range y va v [v] [] operating range figure 10. lock detection off time vs supply voltage 105c 25c -40c [] w va v [v] figure 11. al output low voltage vs output sink current (vcc=12v) 105c 25c -40c [] w va v [v] figure 12. al output low voltage vs output sink current (ta=25c) 17v 12v 4.3v downloaded from: http:///
datasheet d a t a s h e e t 6/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 reference data - continued va v [v] a [] operating range figure 13. al output leak current vs output voltage 105c 25c -40c y va v [v] w va v v [v] operating range figure 14. osc high/low voltage vs supply voltage 105c 25c -40c 105c 25c -40c y va v [v] aa [] operating range figure 15. osc charge/discharge current vs supply voltage 105c 25c -40c 105c 25c -40c y va v [v] va v [v] operating range figure 16. reference voltage vs supply voltage 105c 25c -40c downloaded from: http:///
datasheet d a t a s h e e t 7/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 reference data - continued [] va v [v] figure 17. reference voltage vs output source current (vcc=12v) 105c 25c -40c y va v [v] a a va v [v] operating range figure 18. hall bias voltage vs supply voltage 105c 25c -40c [] a a va v [v] figure 19. hall bias voltage vs output source current (vcc=12v) 105c 25c -40c y va v [v] va v [v] operating range figure 20. current limit setting voltage vs supply voltage 105c 25c -40c downloaded from: http:///
datasheet d a t a s h e e t 8/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 reference data - continued y va v [v] a [] operating range figure 24. cs bias current vs supply voltage 105c 25c -40c y va v [v] a [] operating range figure 21. ss charge current vs supply voltage 105c 25c -40c y va v [v] a [] operating range figure 23. min bias current vs supply voltage 105c 25c -40c y va v [v] a [] operating range figure 22. th bias current vs supply voltage 105c 25c -40c downloaded from: http:///
datasheet d a t a s h e e t 9/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 pin configuration block diagram pin description pin no. pin name function 1 al lock alarm signal output pin 2 osc oscillating capacitor connecting pin 3 min minimum output duty setting pin 4 th output duty controllable input pin 5 ref reference voltage output pin 6 vcc power supply pin 7 a1h high side output 1 pin 8 a1l low side output 1 pin 9 a2l low side output 2 pin 10 a2h high side output 2 pin 11 cs output current detection pin 12 ss soft start capacitor connecting pin 13 h+ hall + input pin 14 hb hall bias pin 15 h- hall - input pin 16 gnd ground pin th min osc al signal output ref a1h vcc v cc h+ a1l gnd cs hall comp hall amp hb control logic pre- driver a2l a2h ref reg reg osc quick start lock protect tsd h- ss pwm soft switching pwm comp pwm comp hall bias soft start & current limit comp 1 2 3 4 5 6 7 8 10 9 1413 12 11 1615 v cl min ref hb a1h h+ h- al a2h vcc osc cs gnd th a1l 1 2 3 4 5 6 7 15 a2l ss 16 8 14 13 12 11 9 10 (top view) downloaded from: http:///
datasheet d a t a s h e e t 10/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 application circuit example(constant values are for reference) 1) pwm input application 1 i t is an example of the application of co nverting the external pwm duty into dc voltage, and controlling the rotational speed. minimum rotational speed can be set. substrate design note a) motor power and ground lines are made as fat as possible. b) ic power line is made as fat as possible. c) ic ground line is common with the application ground except motor ground (i.e. hall ground etc.), and arranged near to (-) land. d) the bypass capacitors (vcc side and vm side) are arrangement near to vcc terminal and fets, respectively. e) h+ and h- lines are arranged side by side and made from the hall element to ic as shorter as possible, because it is easy for the noise to influence the hall lines. figure 25. application of converting pwm duty to dc voltage circuit that converts pwm duty into dc voltage minimum output duty setting output pwm frequency setting protection of al open-drain low-pass filter for rnf voltage smoothing noise measures of substrate so bypass capacitor, arrangement near to fets as much as p ossible so bypass capacitor, arrangement near to vcc terminal as much as p ossible reverse-connected prevention of the fan reverse-connected prevention of the fan stabilization of ref voltage soft start time setting to limit motor current, the current is detected. note the power consumption of detection resistance. drive the pmos fet gate by constant current flowing to ic adjustment the pmos fet slew rate adjustment the nmos fet slew rate stabilization of nmos fet gate drive hall bias is set according to the amplitude of hall element output and hall input voltage range. pwm m 470 ? to 1k ? 0 ? to 2k ? 0 ? to 2k ? 2k ? to 20k ? 1 f to 1 f to th min osc al signal output ref a1h vcc vcc h+ a1l gnd cs hall comp hall amp hb control logic pre- driver a2l a2h ref reg reg osc quick start lock protect tsd h- ss pwm soft switching pwm comp pwm comp hall bias soft start & current limit comp 1 2 3 4 5 6 7 8 10 9 14 13 12 11 16 15 v cl sig 0 ? to 100pf to 1000pf 0.1 f to h 0 ? to 0.01 f to 4.7 f 200 ? to 20k ? 100pf to 0.01 f downloaded from: http:///
datasheet d a t a s h e e t 11/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 application circuit example(constant values are for reference) 2) pwm input application 2 it is an example of the application of inverting the extern al pwm input, and controlling the rotational speed. in this application, if the external pwm input is open, it controls by the set maximum rotational speed. minimum rotational speed cannot be set. figure 26. application of direct pwm input to be disable th terminal, set th voltage more than osc high level (typ 2.5v) and less than ref voltage (typ 5.0v). circuit that input direct pwm (ref.) pwm input frequency is 20khz to 50khz pwm m 470 ? to 1k ? 0 ? to 2k ? 0 ? to 2k ? 2k ? to 20k ? 1 f to 1 f to sig 0 ? to 100pf to 1000pf 0.1 f to h 0 ? to 0.01 f to 4.7 f 200 ? to 20k ? 100pf to 0.01 f th min osc al signal output ref a1h vcc vcc h+ a1l gnd cs hall comp hall amp hb control logic pre- driver a2l a2h ref reg reg osc quick start lock protect tsd h- ss pwm soft switching pwm comp pwm comp hall bias soft start & current limit comp 1 2 3 4 5 6 7 8 10 9 14 13 12 11 16 15 v cl downloaded from: http:///
datasheet d a t a s h e e t 12/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 application circuit example(constant values are for reference) 3) dc voltage input application 1 it is an example of the application for the fixed rotation speed control by dc voltage. minimum rotational speed cannot be set. set th voltage less than osc high level (typ 2.5v) m 470 ? to 1k ? 0 ? to 2k ? 0 ? to 2k ? 2k ? to 20k ? 1 f to 1 f to th min osc al signal output ref a1h vcc vcc h+ a1l gnd cs hall comp hall amp hb control logic pre- driver a2l a2h ref reg reg osc quick start lock protect tsd h- ss pwm soft switching pwm comp pwm comp hall bias soft start & current limit comp 1 2 3 4 5 6 7 8 10 9 14 13 12 11 16 15 v cl sig 0 ? to 100pf to 1000pf 0.1 f to h 0 ? to 0.01 f to 4.7 f 200 ? to 20k ? 100pf to 0.01 f figure 27. application of dc voltage input downloaded from: http:///
datasheet d a t a s h e e t 13/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 application circuit example(constant values are for reference) 4) dc voltage input application 2 (t hermistor control application) it is an example of the application of cont rolling the rotational speed by the ambient temperature. in this application, if the thermistor is open, it controls by the set maximum rotational speed. figure 28. application of thermistor control correction resistance of making to linear insertion if necessar y the input voltage is changeable in the ambient temperature set by the thermistor constant. m 470 ? to 1k ? 0 ? to 2k ? 0 ? to 2k ? 2k ? to 20k ? 1 f to 1 f to th min osc al signal output ref a1h vcc vcc h+ a1l gnd cs hall comp hall amp hb control logic pre- driver a2l a2h ref reg reg osc quick start lock protect tsd h- ss pwm soft switching pwm comp pwm comp hall bias soft start & current limit comp 1 2 3 4 5 6 7 8 10 9 14 13 12 11 16 15 v cl sig 0 ? to 100pf to 1000pf 0.1 f to h 0 ? to 0.01 f to 4.7 f 200 ? to 20k ? 100pf to 0.01 f downloaded from: http:///
datasheet d a t a s h e e t 14/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 application circuit example(constant values are for reference) 5) high voltage (24v power supply) application (pwm input application 1) it is an example of the application of co nverting the external pwm duty into dc voltage, and controlling the rotational speed. minimum rotational speed can be set. figure 29. 24v power supply application of pwm input protection of fet (between drain and source) and motor coil regenerative circuit of back emf take a measure to ensure maximum absolute rating of al ( 20v ) . generative circuit of vcc input voltage pwm 100pf to 1000pf 0.1 f to h 0 ? to 0.01 f to 4.7 f 100pf to 0.01 f 200 ? to 20k ? m 1 f to 0 ? to 2k ? 2k ? to 20k ? 0 ? to 1k ? 1 f to th min osc al signal output ref a1h vcc vcc h+ a1l gnd cs hall comp hall amp hb control logic pre- driver a2l a2h ref reg reg osc quick start lock protect tsd h- ss pwm soft switching pwm comp pwm comp hall bias soft start & current limit comp 1 2 3 4 5 6 7 8 10 9 14 13 12 11 16 15 v cl sig 0 ? to downloaded from: http:///
datasheet d a t a s h e e t 15/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 application circuit example(constant values are for reference) 6) high voltage (over 48v power supply) application (pwm input application 1) it is an example of the application of co nverting the external pwm duty into dc voltage, and controlling the rotational speed. minimum rotational speed can be set. figure 30. over 48v power supply application of pwm input take a measure to ensure maximum absolute rating of a1h and a2h ( 36v ) . pwm 0.1 f to h 0 ? to 0.01 f to 4.7 f 100pf to 0.01 f 200 ? to 20k ? m 1 f to 0 ? to 2k ? 2k ? to 20k ? 0 ? to 1k ? 1 f to th min osc al signal output ref a1h vcc vcc h+ a1l gnd cs hall comp hall amp hb control logic pre- driver a2l a2h ref reg reg osc quick start lock protect tsd h- ss pwm soft switching pwm comp pwm comp hall bias soft start & current limit comp 1 2 3 4 5 6 7 8 10 9 14 13 12 11 16 15 v cl 100pf to 1000pf sig 0 ? to downloaded from: http:///
datasheet d a t a s h e e t 16/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 functional descriptions 1) variable speed operation rotating speed changes by pwm duty on the high side outputs (a1h, a2h terminals). pwm operation enables, a) by dc voltage input in th terminal, and min terminal b) by pulse input in min terminal a) pwm operation by dc input as shown in figure 31, to change high side output on duty, dc voltage input from th terminal is compared with triangle wave produced by the osc circuit. min terminal is for setting the minimum rotating speed. on duty is determined by either th terminal voltage or min terminal voltage, whichever is lower. osc voltage > th voltage (min voltage): high side output is on osc voltage < th voltage (min voltage): high side output is off dividing resistance of the internal regulator (equal to typ 5.0v ref terminal) generates osc high level (typ 2.5v) and osc low level (typ 1.0v) voltage, and the ratio of those voltages is designed to be hard to fluctuate. when the input voltage at th terminal is constant, effect by fluctuation of osc h/l volt age is large. however, by setting that an application of ref voltage generates input voltage via th, application can be made hard to be affected by voltage fluctuation of triangle wave. for an application that requires stri ct precision, determine a value with sufficient margin after full consideration of external constant is taken. protection against thermistor coming off when the thermistor becomes an opening (the th voltage is more than the ref voltage) as a protection function in the dc input application that uses the thermistor like figur e 33, it doesn't depend on the min voltage and it sets by the maximum rotation speed. setting of output oscillating frequency at dc voltage input frequency (fosc) in which the high side outputs are operated pwm by dc voltage input is set according to capacity value (cosc) of the capacitor connected with osc terminal. ref osc ref th pwm comp pwm comp min osc ref osc ref th pwm comp pwm lpf pwm comp min osc if thermistor is open, motor drives the full speed. ref osc ref th pwm comp pwm comp min osc figure 33. protection for thermistor coming off figure 32. dc input application 2 figure 31. dc input application 1 re f a1 h th 5.0v 1.0v 2.5v low high low high h+ hC 0.0v gnd zero ful l min : high impedance min. osc a2 h low high motor torque high side output on figure 34. dc input operation timing chart f osc [hz] = (|i dosc [a] x i cosc [a]|) / {c osc [f] x (|i dosc [a]| + |i cosc [a]|) x (v osch [v] - v oscl [v])} (ex.) the frequency when output pwm operates becomes about 28khz when assuming that cosc is 470pf. f osc [hz] = {|40[ a] x (-40[ a])|} / {470[pf] x (|40[ a]| + |-40[ a]|) x (2.5[v] - 1.0[v])} = 28369[hz] downloaded from: http:///
datasheet d a t a s h e e t 17/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 1) variable speed operation C continued the voltage of the terminal becomes irregular as for th or min terminals when opening, and input both voltages to both terminals when you turn on ic power supply (vcc). b) pwm operation by pulse input pulse signal can be input to min terminal for pwm operat ion as shown in figure 38. the on duty of the high side output changes by the cycle of the input pulse signal as shown in figure 38. the th terminal is set more than osc high level and less than ref volta ge. set the voltage of min terminal as, ref min > osc high level: high side output is off gnd min < osc low level: high side output is on pwm ref osc ref min pwm comp pwm comp th osc if pwm is open, mi n is ref th re f : high impedance a1 h min 5.0v 1.0v 2.5v a2 h low high low high low high h+ hC 0.0v gnd low high pwm zero ful l osc motor torque high side output on ref osc ref min pwm comp pwm comp th osc pwm ref or v cc if pwm is open, mi n is 0v ref ok pull up setting (protection against thermistor coming off enables) th min th min ref setting less than internal osc high level (torque on setting) ok pull down setting (torque on setting) ok ref th min figure 35. setting of the variable speed function ref ng open setting (prohibit input) th min figure 36. pwm input application 1 figure 38. pwm input operation timing chart figure 37. pwm input application 2 downloaded from: http:///
datasheet d a t a s h e e t 18/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 2) current limit the current limit circuit turns off the output, when the current that flows to the motor coil is detected exceeding a set value. the current value that current limit operates is determined by internal setting voltage and voltage of cs terminal. in figure 39, io is the current flowed to the motor coil, r nf is the resistance detected the current, and p r is the power consumption of r nf . when r nf =0.1[ ? ], the current limit setting voltage (v cl ) is 150mv, be shorted cs terminal to gnd, when the current limit function is not used. r cs and c cs consist of the low-pass filter for smoothing rnf voltage. share and assume the ground of c cs to be the small signal ground line with the gnd pin of ic for the malfunction prevention of a current limit. separate with the motor large current ground line with which r nf is connected. soft start capacitor c ss described later is similar. (refer to p.10 substrate design note c)) 3) soft start soft start is a function to gradually raise a driving torque at the time of motor start. be effective against reducing undesired sound and inrush current. the soft start time is set by the charge to the capacitor connected with the terminal ss. if motor output current (i o ) and ss time (t ss ) are decided, the value of capacitor (c ss ) that sets a soft start can be calculated by the following expressions because ss charge current (i ss ) is 120na. when soft start time is set for a long time, lock pr otection may be detected without enough motor torque. therefore, a lock protection function is tu rned off until ss voltage becomes 50mv (typ). if it is not used the soft start function, open the ss terminal. ng open setting (prohibit input) cs ss ok open setting (soft start disables) setting of capacitor (soft start enables) ok ss pull down setting (current limit disables) ok cs io[a] = v cl [v] / r nf [ ? ] = 150[mv] / 0.1[ ? ] = 1.5[a] i ss cs ss gnd large current ground line of motor r nf r cs soft start & currentlimit comp vcl c cs io m c ss small signal ground line of driver ic figure 39. setting of current limit and ground line p r [w] = v cl [v] x io[a] = 150[mv] x 1.5[a] = 0.225[w] figure 40. output current characteristics by the soft start function c ss [f] = (i ss [a] x t ss [s]) / (i o [a] x r nf [ ? ]) (ex.) when assuming that t ss = 0.47[s], i o = 1.2[a], and r nf = 0.1[ ? ], c ss [f] = (120[na] x 0.47[s]) / (1.2[a] x 0.1[ ? ]) = 0.47 x 10 -6 [ f ] figure 41. setting of the current limit and the soft start functions connecting to rnf (current limit enables) ok cs rnf 0v 0v 0a icc ss voltage 50mv power supply lock protection function :off i o ss discharge current time (1ms) lock protection function :on soft start time (t ss ) downloaded from: http:///
datasheet d a t a s h e e t 19/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 4) quick start when torque off logic is input by the control signal over fi xed time (1.0ms), the lock protection function disables. and the motor could restart quickly at the timing of control signal is input. the lock protection function doesnt work in an input freq uency that is slower than 1khz when assuming high level duty = 100% of the min input signal. input signal frequency is faster than 2khz. 5) hall input setting hall input voltage range is shown in operating conditions (p.2). adjust the value of hall element bias resistor r1 in figure 44 so that the input voltage of a ha ll amplifier is input in "hall input voltage" including signal amplitude. in order to detect rotation of a motor, the amplitude of hall si gnal more than "hall input hysteresis voltage" is required. in consideration of pwm soft switching to mention later, input hall signal more than 100mv at least. reducing the noise of hall signal vcc noise or the like depending on the wiring pattern of board may affect hall element. in this case, place a capacitor like c1 in figure 44. in addition, when wiring from the hall element output to ic hall input is long, noise may be loaded on wiring. in this case, place a capacitor like c2 in figure 44. hall input upper limit voltage hall input lower voltage hall input voltage range 7v (vcc>9v) vcc-2v (vcc<9v) gnd figure 43. hall input voltage range hall bias current = hb / (r1 + rh ) hall elemen t h- h+ hb c2 r1 rh c1 figure 44. application near hall signal disable enable min 0v vr e f low high h+ hC 0% motor output on duty typ. 1.0ms torque off motor stop to r q ue o n lock protection signa l motor idling quick start standby mode th or min torque tss figure 42. pwm input and quick start timing chart downloaded from: http:///
datasheet d a t a s h e e t 20/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 6) pwm soft switching the pwm soft switching section is set to the timing before and after the change of the hall signal. be effective against reducing undesired sound. adjusting the amplitude of the hall signal can change t he length of the pwm soft switching section. the pwm soft switching section becomes wide if th e amplitude of the hall signal is reduced, and the gradient of the output current bec omes smooth. however, when a soft switching is applied too much, torque shortage might be caused. input hall signal more than 100mv at least. the pwm soft switching function op erates in the dc input applicatio n and the pulse input application. figure 45. relation between hall signal amplitude and output wave . 7) lock protection and automatic restart motor rotation is detected by hall signal period. ic detects motor rotation is stop when the period becomes longer than the time set up at the internal counter, and ic turns off the output. lock detection on time (t on ) and lock detection off time (t off ) are set by the digital counter based on internal oscill ator. therefore the ratio of on/off time is always constant. timing chart is shown in figure 46. figure 46. lock protection (incorporated counter system) timing chart small large h+ hC mid small large mid out1 out2 low high low high 0a h a l l a m p l i t u d e ; l a r g e h a l l a m p l i t u d e ; middle h a l l a m p l i t u d e ; s m a l l m o t o r c u r r e n t toff (typ. 6.0s) lo w hi gh : high impedance a1h lo w hi gh lo w hi gh h+ hC 0% a1 l a2h lo w hi gh a2 l lo w hi gh ton toff th or mi n torque ton (typ. 0.3s) ton toff al lo w hi gh tss tss tss : on duty up from 0% motor output on duty motor loc king lock detection lock release motor idling downloaded from: http:///
datasheet d a t a s h e e t 21/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 8) the upper side output of pre driver the upper side output of pre driv er is constant current open-drain. in figure 47, decide the resistance of r1 so that the voltage generated between gate and source of external pmos transistor may exceed enough the threshold voltage of the transistor. (ex.) at r1=1k ? , pmos transistor gate-source voltage v gsp can be shown below, v gsp = r1 ih = 1k ? 12ma (typ) = 12v r2 is used to suppress the power consumption of ic. at power supply = 24v, the power consumption p m1 of upside output transistor m1 is p m1 = { vm - (r1 + r2) ih } ih = 144mw (at r1 = 1k ? , r2 = 0 ? ) = 72mw (at r1 = 1k ? , r2 = 0.5k ? ) useless power consumption in the upside out put is suppressed by appropriately setting r2, and a permissible loss of the package can be used effectively in lower output. high voltage application it is possible to correspond to 24v and 48v power supply by using the application circuit that is set not to exceed the absolute maximum rating of vcc, a1h to a2l, and al terminal. refer to the application circuit of p14 and p15. absolute maximum rating voltage of pre driver power supply lower output upper output al output 20v 15v (cmos output) 36v (open drain output) 20v (open drain output) figure 47. 24v application 6 7 8 11 9 10 vcc a1h a1l a 2l a 2h cs r2 ih m1 r1 24v downloaded from: http:///
datasheet d a t a s h e e t 22/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 equivalent circuit 1) hall input terminal 2) high side output 1,2 pins low side output 1,2 pins 3) output current detecting terminal 4) reference voltage terminal 5) hall bias terminal 6) al output terminal 7) variable amplifier input terminal 8) minimum rotating sp eed setting terminal 9) oscillating capacitor connecting terminal 10) soft start capacitor-connecting terminal al cs th min osc ss h+, h- a1h a1l a 2h a 2l ref 36k ? hb 31k ? downloaded from: http:///
datasheet d a t a s h e e t 23/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 safety measure 1) reverse connection protection diode reverse connection of power results in ic destruction as shown in figure 48. when reverse connection is possible, reverse connection protection diode must be added between power supply and vcc. figure 48. flow of current when power is connected reversely 2) protection against vcc voltage rise by back electromotive force back emf generates regenerative current to power supply. however, when reverse connection protection diode is connected, vcc voltage rises because the diode prevents current flow to power supply. figure 49. vcc voltage rise by back electromotive force when the absolute maximum rated voltage may be exceeded due to voltage rise by back electromotive force, place (a) capacitor or (b) zener diode between vcc and gnd. it necessary, add both (c). figure 50. protection against vcc voltage rise (a) capacitor (b) zener diode (c) capacitor and zener diode on on on on on on phase switching on on on on vcc gnd vcc gnd vcc gnd internal circuit impedance high ? amperage small circuit block ea ch pin in normal energization large current flows ? thermal destruction each pin circuit block reverse power connection no destruction each pin circuit block after reverse connection destruction prevention downloaded from: http:///
datasheet d a t a s h e e t 24/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 pd(w) 1.0 0.87 0.8 0.6 0.4 0.2 0 2 55 07 5 1 0 5 100 125 150 ta(c) 3) problem of gnd line pwm switching do not perform pwm switching of gnd line because gnd potential cannot be kept to a minimum. figure 51. gnd line pwm switching prohibited 4) al output al is an open drain outuput and requires pull-up resistor. vcc voltage that is beyond its absolute maximum rating when al pin is directly connected to power supply, could damage the ic. the ic can be protected by adding resistor r1. (as shown in figure 52) figure 52. protection of al pin thermal derating curve thermal derating curve indicates power that can be consumed by ic with reference to ambient temperature. power that can be consumed by ic begins to attenuate at certain ambient temperature. this gradient is determined by thermal resistance ja. thermal resistance ja depends on chip size, power consumption, package ambient temperature, packaging condition, wind velocity, etc., even when the same package is used. thermal derating curve indicates a reference value measured at a specified condition. figure 53 shows a thermal derating curve. reduce by 7.0 mw/c over 25c. (70.0mm x 70.0mm x 1.6mm glass epoxy board) figure 53. thermal derating curve pwm input prohibited vcc motordriver gnd controller m a l protection resistor r1 pull-up resistor vcc connector of board downloaded from: http:///
datasheet d a t a s h e e t 25/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 operational notes 1. reverse connection of power supply connecting the power supply in reverse polarity can damage the ic. take precautions against reverse polarity wh en connecting the power supply, such as mounting an external diode between the power supply and the ics power supply pins. 2. power supply lines design the pcb layout pattern to provide low impedance supply lines. separate the ground and supply lines of the digital and analog blocks to prevent noise in the ground and supply lines of the digital bloc k from affecting the analog block. furthermore, connect a capacitor to ground at all power supply pins. consider the effect of temperature and aging on the capacitance value when using electrolytic capacitors. 3. ground voltage ensure that no pins are at a voltage below that of the ground pin at any time, even during transient condition. however, pins that drive inductive loads (e.g. motor driver output s, dc-dc converter outputs) may inevitably go below ground due to back emf or electromotive force. in such cases, the user should make sure that such voltages going below ground will not cause the ic and the system to malfunction by examining carefully all relevant factors and conditions such as motor characteristics, supply voltage, operating frequency and pcb wiring to name a few. 4. ground wiring pattern when using both small-signal and large-current ground traces, the two ground traces should be routed separately but connected to a single ground at the reference point of the application board to avoid fluctuations in the small-signal ground caused by large currents. also ensure that the ground traces of external components do not cause variations on the ground voltage. the ground lines must be as short and thick as possible to reduce line impedance. 5. thermal consideration should by any chance the power dissipation rating be exceeded the rise in temperature of the chip may result in deterioration of the properties of the chip. the absolute maximum rating of t he pd stated in this specification is when the ic is mounted on a 70mm x 70mm x 1.6mm glass epoxy board. in case of exceeding this absolute maximum rating, increase the board size and copper area to prevent exceeding the pd rating. 6. recommended operating conditions these conditions represent a range within which the expect ed characteristics of the ic can be approximately obtained. the electrical characteristics are guaranteed under the conditions of each parameter. 7. inrush current when power is first supplied to the ic, it is possible that the internal logic may be unstable and inrush current may flow instantaneously due to the internal powering sequence and delays, especially if the ic has more than one power supply. therefore, give special consideration to power coupling capacitance, power wiring, width of ground wiring, and routing of connections. 8. operation under strong electromagnetic field operating the ic in the presence of a strong electromagnetic field may cause the ic to malfunction. 9. testing on application boards when testing the ic on an application board, connecting a capacitor directly to a low-impedance output pin may subject the ic to stress. always discharge capacitors completely after each process or step. the ics power supply should always be turned off completely before connecting or removing it from the test setup during the inspection process. to prevent damage from static discharge, ground t he ic during assembly and use similar precautions during transport and storage. 10. inter-pin short and mounting errors ensure that the direction and position are correct when mounting the ic on the pcb. incorrect mounting may result in damaging the ic. avoid nearby pins being shorted to each ot her especially to ground, power supply and output pin. inter-pin shorts could be due to many reasons such as metal particles, water droplets (in very humid environment) and unintentional solder bridge deposited in between pins during assembly to name a few. downloaded from: http:///
datasheet d a t a s h e e t 26/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 operational notes C continued 11. unused input pins input pins of an ic are often connected to the gate of a mos transistor. the gate has extremely high impedance and extremely low capacitance. if left unconnected, the electric field from the outside can easily charge it. the small charge acquired in this way is enough to produce a signifi cant effect on the conduction through the transistor and cause unexpected operation of the ic. so unless otherwise specified, unused input pins should be connected to the power supply or ground line. 12. regarding the input pin of the ic this monolithic ic contains p+ isolation and p substrat e layers between adjacent elements in order to keep them isolated. p-n junctions are formed at the intersection of t he p layers with the n layers of other elements, creating a parasitic diode or transistor. for example (refer to figure below): when gnd > pin a and gnd > pin b, the p-n junction operates as a parasitic diode. when gnd > pin b, the p-n junction operates as a parasitic transistor. parasitic diodes inevitably occur in the structure of the ic. the operation of parasitic diodes can result in mutual interference among circuits, operational faults, or physical dam age. therefore, conditions that cause these diodes to operate, such as applying a voltage lower than the gnd voltage to an input pin (and thus to the p substrate) should be avoided. figure 54. example of monolithic ic structure 13. ceramic capacitor when using a ceramic capacitor, determine the dielectric constant considering the change of capacitance with temperature and the decrease in nominal capacitance due to dc bias and others. 14. thermal shutdown circuit(tsd) this ic has a built-in thermal shutdown circuit that pr events heat damage to the ic. normal operation should always be within the ics power dissipation rating. if however the rating is exceeded for a continued period, the junction temperature (tj) will rise which will activate the tsd circuit that will turn off all output pins. when the t j falls below the tsd threshold, the circuits are automatically restored to normal operation. note that the tsd circuit operates in a situation that ex ceeds the absolute maximum ratings and therefore, under no circumstances, should the tsd circuit be used in a set desi gn or for any purpose other than protecting the ic from heat damage. downloaded from: http:///
datasheet d a t a s h e e t 27/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 ordering information b d 6 9 7 4 0 f v - ge2 part number package fv: ssop-b16 packaging and forming specification g: halogen free e2: embossed tape and reel marking diagrams ssop-b16(top view) 69740 part number marking lot number 1pin mark downloaded from: http:///
datasheet d a t a s h e e t 28/28 BD69740FV www.rohm.com ? 2015 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 11.aug.2015 rev.001 tsz02201-0h1h0b101570-1-2 physical dimension, tape and reel information package name ssop-b16 ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape tapequantity direction of feed the direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand 2500pcs e2 () direction of feed reel 1pin downloaded from: http:///
datasheet d a t a s h e e t notice-pga-e rev.001 ? 2015 rohm co., ltd. all rights reserved. notice precaution on using rohm products 1. our products are designed and manufac tured for application in ordinary elec tronic equipments (such as av equipment, oa equipment, telecommunication equipment, home electroni c appliances, amusement equipment, etc.). if you intend to use our products in devices requiring ex tremely high reliability (such as medical equipment (note 1) , transport equipment, traffic equipment, aircraft/spacecra ft, nuclear power controllers, fuel c ontrollers, car equipment including car accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or serious damage to property (specific applications), please consult with the rohm sale s representative in advance. unless otherwise agreed in writing by rohm in advance, rohm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of any ro hms products for specific applications. (note1) medical equipment classification of the specific applications japan usa eu china class class class b class class ? class 2. rohm designs and manufactures its products subject to strict quality control system. however, semiconductor products can fail or malfunction at a certain rate. please be sure to implement, at your own responsibilities, adequate safety measures including but not limited to fail-safe desi gn against the physical injury, damage to any property, which a failure or malfunction of our products may cause. the following are examples of safety measures: [a] installation of protection circuits or other protective devices to improve system safety [b] installation of redundant circuits to reduce the impact of single or multiple circuit failure 3. our products are designed and manufactured for use under standard conditions and not under any special or extraordinary environments or conditio ns, as exemplified below. accordin gly, rohm shall not be in any way responsible or liable for any damages, expenses or losses arising from the use of an y rohms products under any special or extraordinary environments or conditions. if you intend to use our products under any special or extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of product performance, reliability, etc, prior to use, must be necessary: [a] use of our products in any types of liquid, incl uding water, oils, chemicals, and organic solvents [b] use of our products outdoors or in places where the products are exposed to direct sunlight or dust [c] use of our products in places where the products ar e exposed to sea wind or corrosive gases, including cl 2 , h 2 s, nh 3 , so 2 , and no 2 [d] use of our products in places where the products are exposed to static electricity or electromagnetic waves [e] use of our products in proximity to heat-producing components, plastic cords, or other flammable items [f] sealing or coating our products with resin or other coating materials [g] use of our products without cleaning residue of flux (ev en if you use no-clean type fluxes, cleaning residue of flux is recommended); or washing our products by using water or water-soluble cleaning agents for cleaning residue after soldering [h] use of the products in places subject to dew condensation 4. the products are not subjec t to radiation-proof design. 5. please verify and confirm characteristics of the final or mounted products in using the products. 6. in particular, if a transient load (a large amount of load applied in a short per iod of time, such as pulse. is applied, confirmation of performance characteristics after on-boar d mounting is strongly recomm ended. avoid applying power exceeding normal rated power; exceeding the power rating under steady-state loading c ondition may negatively affect product performance and reliability. 7. de-rate power dissipation (pd) depending on ambient temper ature (ta). when used in seal ed area, confirm the actual ambient temperature. 8. confirm that operation temperat ure is within the specified range described in the product specification. 9. rohm shall not be in any way responsible or liable for fa ilure induced under deviant condi tion from what is defined in this document. precaution for mounting / circuit board design 1. when a highly active halogenous (chlori ne, bromine, etc.) flux is used, the resi due of flux may negatively affect product performance and reliability. 2. in principle, the reflow soldering method must be used on a surface-mount products, the flow soldering method must be used on a through hole mount products. if the flow sol dering method is preferred on a surface-mount products, please consult with the rohm representative in advance. for details, please refer to rohm mounting specification downloaded from: http:///
datasheet d a t a s h e e t notice-pga-e rev.001 ? 2015 rohm co., ltd. all rights reserved. precautions regarding application examples and external circuits 1. if change is made to the constant of an external circuit, pl ease allow a sufficient margin considering variations of the characteristics of the products and external components, including transient characteri stics, as well as static characteristics. 2. you agree that application notes, re ference designs, and associated data and in formation contained in this document are presented only as guidance for products use. theref ore, in case you use such information, you are solely responsible for it and you must exercise your own indepen dent verification and judgment in the use of such information contained in this document. rohm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of such information. precaution for electrostatic this product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. please take proper caution in your manufacturing process and storage so that voltage exceeding t he products maximum rating will not be applied to products. please take special care under dry condit ion (e.g. grounding of human body / equipment / solder iron, isolation from charged objects, se tting of ionizer, friction prevention and temperature / humidity control). precaution for storage / transportation 1. product performance and soldered connections may deteriora te if the products are stor ed in the places where: [a] the products are exposed to sea winds or corros ive gases, including cl2, h2s, nh3, so2, and no2 [b] the temperature or humidity exceeds those recommended by rohm [c] the products are exposed to di rect sunshine or condensation [d] the products are exposed to high electrostatic 2. even under rohm recommended storage c ondition, solderability of products out of recommended storage time period may be degraded. it is strongly recommended to confirm sol derability before using products of which storage time is exceeding the recommended storage time period. 3. store / transport cartons in the co rrect direction, which is indicated on a carton with a symbol. otherwise bent leads may occur due to excessive stress applied when dropping of a carton. 4. use products within the specified time after opening a humidity barrier bag. baking is required before using products of which storage time is exceeding the recommended storage time period. precaution for product label qr code printed on rohm products label is for rohms internal use only. precaution for disposition when disposing products please dispose them proper ly using an authorized industry waste company. precaution for foreign exchange and foreign trade act since concerned goods might be fallen under listed items of export control prescribed by foreign exchange and foreign trade act, please consult with rohm in case of export. precaution regarding intellectual property rights 1. all information and data including but not limited to application example contained in this document is for reference only. rohm does not warrant that foregoi ng information or data will not infringe any intellectual property rights or any other rights of any third party regarding such information or data. 2. rohm shall not have any obligations where the claims, actions or demands arising from the co mbination of the products with other articles such as components, circuits, systems or external equipment (including software). 3. no license, expressly or implied, is granted hereby under any intellectual property rights or other rights of rohm or any third parties with respect to the products or the informati on contained in this document. pr ovided, however, that rohm will not assert its intellectual property rights or other rights against you or your customers to the extent necessary to manufacture or sell products containing the produc ts, subject to the terms and conditions herein. other precaution 1. this document may not be reprinted or reproduced, in whol e or in part, without prior written consent of rohm. 2. the products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written consent of rohm. 3. in no event shall you use in any wa y whatsoever the products and the related technical information contained in the products or this document for any military purposes, incl uding but not limited to, the development of mass-destruction weapons. 4. the proper names of companies or products described in this document are trademarks or registered trademarks of rohm, its affiliated companies or third parties. downloaded from: http:///

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