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fd2257h smart motor driver with embedded hall sensor this datasheet contains new product information. f eeling technology reserves the rights to modify the product specification without notice. no liability is assumed as a result of the use of t his product. no rights under any patent accompany t he sales of the product. rev1.1 june. 12, 2009 p.1 feeling technology features motor driver with high sensitivity hall-effect sen sor h-bridge mos driver lock-shutdown protection & auto-restart function soft-switch phase-switching technique to reduce vibration and acoustic noise thermal shutdown protection(tsd) available in sip-4l package for 12v or 24v dc motor / fan systems general description fd2257h is a single-phase full wave motor driver wi th embedded hall-effect sensor ic. it integrates a h-bridge mos driver, a high sensitivity hall-effect sensor, an event timer for rotor locked in sip-4l package, which make the motors pcbs(printed circuit boards) design easy an d fabricate the high efficiency and high voltage dc motors or fans as simply as possible. for safety, lock-shutdown function would turn the i cs internal drivers off avoiding over-heat when th e rotor is locked, and ic will try to re-start the rotors tor que after the time of these drivers shutdown. thermal-shutdown protection (tsd) ensures the inter nal drivers of ic are operating under a safe operat ing temperature range. all the protection mechanisms mentioned above combi ne to provide a complete protecting scenario in the motor system and avoid any possible damages and guarantee under a correct and safe operation. block diagram figure.1 bias generator h-bridge mos driver oscillator hall plate reset power on digital control logic (event timer) chopper amplifier halogen free
fd2257h rev1.1 june. 12, 2009 p.2 feeling technology pin connection marking distinguish figure.2 figure.3 pin descriptions legend: i=input, o=output, i/o=input/output, p=powe r supply, g=ground functional descriptions refer to the block diagram (figure.1), fd2257h is c omposed of the following building blocks: bias generator the bias generator provides precise, temperature- a nd process-insensitive bias references for the anal og blocks. these references guarantee proper operation of the ic under all conditions specified in this specifica tion. oscillator the built-in oscillator provides the clock signal f or the digital control logic. power on reset used to detect the power-up ramp and reset the digi tal circuits to achieve correct operation as soon a s the power is ready. chopper amplifier to achieve a higher magnetic sensitivity the choppe r amplifier structure is adopted in this design. us e of this structure dynamically removes both the offset and f licker noise at the same time. digital control logic hall sensor part C generates magnetic pole signals from the hall-effect sensor. driver part C generates switching signals to the h- bridge mos driver. timer part C generates an interval of time when rot or locked event is occurred. name i/o fd2257h description vdd p 1 positive power supply no o 2 driver output 1 so o 3 driver output 2 vss g 4 ground 2257h 1 2 3 4 vss no so vdd ymv-xx lot number 2257h ymv- xx mass production version half month (ex :a,b ~ x) year (ex:2008 8)
fd2257h rev1.1 june. 12, 2009 p.3 feeling technology absolute maximum ratings parameter symbol conditions values unit min. typ. max. operating temperature t op - -40 85 storage temperature t st - -55 150 dc supply voltage v dd - 29 v output voltage (no, so) v out - v dd +0.3v v supply current i dd - 5 ma continuous current i o(cont) 300 ma hold current i o(hold) 800 ma peak current i o(peak) <100s 1000 ma junction temperature t j 170 power dissipation p d sip-4l 1000 mw thermal resistance jc sip-4l 100 /w thermal resistance ja sip-4l 125 /w magnetic flux density b unlimited gauss ir-reflow lead temperature t p 10sec 260 255 5 o c 10 1 sec 150 10 o c 90 30 sec 2~5 o c /sec 2~5 o c /sec second ir-reflow soldering condition room temp 0 25 50 75 100 125 150(t shut ) 640 824 1000 pd (mw) temp. ( ) o c power dissipation curve 440 240 80 0 o oo o 85
fd2257h rev1.1 june. 12, 2009 p.4 feeling technology recommended operating conditions parameter symbol conditions values unit min. typ. max. supply voltage v dd - 4.0 28 v operating temperature range t a - -40 85 electrical characteristics t a =25 (unless otherwise specified) parameter symbol conditions values unit min. typ. max. average supply current(no load) i dd v dd = 24v 2.5 ma on resistance (r pmos +r nmos ) r ds(on) v dd = 5v 3.5 v dd = 24v 2.0 thermal shutdown threshold t shut 150 locked rotor period t on 0.4 s locked rotor period t off 4.1 s magnetic characteristics parameter symbol conditions values unit min. typ. max. operate points b op 5 25 50 g release points b rp -5 -25 -50 g hysteresis b hys 50 g driver output vs. magnetic pole parameter test conditions no so north pole b < brp high low south pole b > bop low high note: the magnetic pole is applied facing the branded sid e of the package hysteresis characteristics no so v brp bop b brp bop v b
fd2257h rev1.1 june. 12, 2009 p.5 feeling technology r dson vs. t a 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 t a ( o c) r d son ( ohm s) vdd= 4v vdd=12v vdd=24v vdd=28v r dson vs. v dd 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 v dd (volts) r d s on ( o h m s) ta = -40 ta = 25 ta = 85 magnetic parameters vs. v dd -15 -10 -5 0 5 10 15 20 25 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 v dd (volts) magn etic field ( g auss) bop, ta=25 brp, ta=25 bhyst, ta=25 i d d vs t a 0 0.5 1 1.5 2 2.5 3 3.5 4 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 t a ( o c) i dd ( m a) vdd= 4v vdd=12v vdd=24v vdd=28v i dd vs v dd 0 0.5 1 1.5 2 2.5 3 3.5 4 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 v dd (volts) i d d (m a) ta = -40 ta = 25 ta = 85 magnetic parameters vs. t a -15 -10 -5 0 5 10 15 20 25 30 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 t a ( o c) m a g n et ic f ield ( g au ss) bop, vdd= 4v brp, vdd= 4v bhyst, vdd= 4v bop, vdd=24v brp, vdd=24v bhyst, vdd=24v performance graphs figure.4 figure.5 figure.6 figure.7 figure.8 figure.9
fd2257h rev1.1 june. 12, 2009 p.6 feeling technology application circuit reference figure.10 fd2257h typical application circuits note : must use least c1=1 f(electrolytic) capacitor & r1=4.7~10 ohm for the decoupling between v dd and v ss and place the capacitor as close to the ic as poss ible. 1.90mm 1.70mm u1 fd2257h l1 r1 4.7~10 ohm c1 4.7uf 50v q1 2n2222 cn1 connector 1 2 3 d1 short vcc fg r2 20k ohm motor note 1 note 2 note 1. d1 is reversed protection diode 2. q1 and r2/r3 are fg signal circuit no so r3 2k ohm
fd2257h rev1.1 june. 12, 2009 p.7 feeling technology output waveforms description figure.11 v dd so no re-start time t on shutdown time t off rotor stop normal operation time i in
fd2257h rev1.1 june. 12, 2009 p.8 feeling technology fd2257h output waveforms measurement fd2257h start-up voltage ch1: no output ch2: so output ch3: input voltage (no diode) ch4: input current start-up voltage ( ~ 3.4v) figure.12 fd2257h normal operation input voltage: +24v ch1: no output ch2: so output ch3: fg output ch4: input current motor speed: ( ~ 2,936 rpm) fg duty cycle ratio: ( ~ 1.053 ) figure.13
fd2257h rev1.1 june. 12, 2009 p.9 feeling technology fd2257h soft-switching input voltage: +28v ch1: no output ch2: so output ch4: input current soft-switching time: ( ~ 196 s) figure.14 fd2257h rotor locked and auto re-start rotation input voltage: +28v ch1: no output ch2: so output ch4: input current off time(t off ): ~ 4.28 s on time(t on ): ~ 0.4 s figure.15
fd2257h rev1.1 june. 12, 2009 p.10 feeling technology fd2257h power on input voltage: +24v ch1: no output ch2: so output ch3: input voltage (no diode) ch4: input current ps. power-on inrush current is the cause of 4.7 f capacitor is charging immediately. figure.16 fd2257h power off input voltage: +24v ch1: no output ch2: so output ch3: input voltage (no diode) ch4: input current figure.17
fd2257h rev1.1 june. 12, 2009 p.11 feeling technology package dimension (unit: mm) sip-4l (halogen free) 2 - 3 d e g . 2 - 5 d e g . 4.20.1 0.4570.025 1.270.025 0.390.05 0.380.05 1.550.25 0.730.03 5.230.12 3 . 6 6 0 . 1 2 15.01.0 1.90mm 1.70mm sensor location
fd2257h rev1.1 june. 12, 2009 p.12 feeling technology packing specification bag & box dimansion packing quantity specifications 1000 ea / 1 bag 20 bags / 1 inside box 4 inside boxes / 1 carton order information part number operating temperature package description moq msl FD2257H-G1 -40 to +85 sip-4l 50g (b) 1,000 ea / bag 3 bag bag label 160 mm 200 mm box label 190 mm 630 mm 100 mm ftc logo inside box carton label ftc logo 240mm 400mm 650mm carton

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