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mp6507 2.7v-to-15v, 700ma, bip olar stepper-motor driver with integrated mosfets mp6507 rev. 1.05 www.monolithicpower.com 1 4/30/2018 mps proprietary information. patent protected. unauth orized photocopy and duplication prohibited. ? 2018 mps. all rights reserved. the future of analog ic technology description the mp6507 is a bipolar stepper-motor driver with dual, built-in full-bridges consisting of n- channel power mosfets. it operates from a supply voltage range of 2.7v to 15v, and can deliver motor current up to 700ma per channel. the internal safety features include sinking and sourcing current limits implemented with external sensors, under-voltage lockout and thermal shutdown. an over-temperature output flag is available to indicate thermal shutdown. the mp6507 is available in 16-pin, 5.0mm6.4mm tssop-ep and tssop, 3mm3mm and 4mmx4mm qfn package with an exposed thermal pad on the back. features ? wide 2.7v-to-15v input voltage range ? two internal full-bridge drivers ? low mosfet on resistance (hs: 500m; ls: 500 m) ? internal charge pump for the high-side driver ? low quiescent current: 1.1ma ? low sleep current: 1a ? thermal shutdown and under-voltage lockout protection ? over-temperature output flag ? thermally-enhanced surface-mount package applications ? pos printers ? video security camera ? digital still cameras ? battery powered toys a ll mps parts are lead-free and adhere to the rohs directive. f or mps green status, please visit mps websit e under products, quality assura nce page. mps and the future of analog ic technology are registered t rademarks of monolithic power systems, inc. typical application motor bst vin aout1 aout2 bout1 bout2 fault vdd v in mp6507 sena windinga senb r senb c1 c2 c3 off on windingb r sena gnd fault bin2 ain1 ain2 bin1 0.1uf 10uf 2.2uf nsleep motor bst vin aout1 aout2 bout1 bout2 fault vdd v in mp6507 sena senb r senb c1 c2 c3 off on r sena gnd fault bin2 ain1 ain2 bin1 0.1uf 10uf 2.2uf nsleep motor stepper motor application dual dc motor application
mp6507 C2.7v-to-15v, 700ma, stepper motor driver mp6507 rev. 1.05 www.monolithicpower.com 2 4/30/2018 mps proprietary information. patent protected. unauth orized photocopy and duplication prohibited. ? 2018 mps. all rights reserved. ordering information part number package top marking mp6507gf * tssop16-ep (5.06.4mm) mp6507 mp6507gq ** qfn16 (33mm) aec MP6507GR *** qfn16 (4x4mm) mp6507 mp6507gm **** tssop16 (5.06.4mm) mp6507 * for tape & reel, add suffix Cz (e.g. mp6507gfCz); * * for tape & reel, add suffix Cz (e.g. mp6507gqCz); *** for tape & reel, add suffix Cz (e.g. MP6507GRCz); **** for tape & reel, add suffix Cz (e.g. mp6507gmCz); package reference top view top view 1 ain2 nsleep sena aout2 bout2 senb bout1 fault aout1 vin bst bin2 bin1 ain1 vdd gnd mp6507 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 exposed pad on backside connected to gnd sena aout2 senb vin gnd vdd bst 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 bout2 bout1 fault bin1 bin2 ain2 ain1 aout1 nsleep exposed pad on backside connected to gnd mp6507 tssop16-ep (5.06.4mm) qfn16 (33mm)/(4x4mm) nsleep aout1 sena aout2 bout2 senb bout1 fault 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 ain1 ain2 vdd gnd vin bst bin2 bin1 top view tssop16
mp6507 C2.7v-to-15v, 700ma, stepper motor driver mp6507 rev. 1.05 www.monolithicpower.com 3 4/30/2018 mps proprietary information. patent protected. unauth orized photocopy and duplication prohibited. ? 2018 mps. all rights reserved. absolute maximum ratings (1) supply voltage v in .......................... -0.3v to 18v aoutx voltage v aoutx ............... -0.3v to v in +1v boutx voltage v boutx ............... -0.3v to v in +1v bst voltage v bst ....................... -0.3v to v in +7v sense voltage v senx ...................... -0.3v to 0.5v all other pins ................................. -0.3v to 6.5v junction temperature ............................... 150c lead temperature .................................... 260c continuous power dissipation (t a = +25c) (2) qfn16 (33mm) ........................................ 2.1w qfn16 (44mm) ........................................ 2.7w tssop16-ep (5.06.4mm) ....................... 2.8w tssop16 ................................................... 1.4 w operating temperature.............. -40c to +85c recommended operating conditions (3) supply voltage v in ........................... 2.7v to 15v output current i a/bout .............................. 700ma operating junction temp. (t j ). -40c to +125c thermal resistance (4) ja jc qfn16(33mm) ...................... 60 ...... 12 ... c/w qfn16(44mm) ...................... 46 ...... 10 ... c/w tssop16-ep(5.06.4mm) ..... 45 ...... 10 ... c/w tssop16 ............................... 90 ...... 30 ... c/w notes: 1) exceeding these ratings may damage the device. 2) the maximum allowable power dissipation is a function of the maximum junction temperature t j (max), the junction-to- ambient thermal resistance ja , and the ambient temperature t a . the maximum allowable continuous power dissipation at any ambient temperature is calculated by p d (max) = (t j (max)-t a )/ ja . exceeding the maximum allowable powe r dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. internal thermal shutdown circuitry protects the device from permanent damage. 3) the device is not guarante ed to function outside of its operating conditions. 4) measured on jesd51-7, 4-layer pcb.
mp6507 C2.7v-to-15v, 700ma, stepper motor driver mp6507 rev. 1.05 www.monolithicpower.com 4 4/30/2018 mps proprietary information. patent protected. unauth orized photocopy and duplication prohibited. ? 2018 mps. all rights reserved. electrical characteristics v in =2.7v to 15v, t a = 25c, unless otherwise noted. parameter symbol condition min type max units power supply input supply voltage v in 2.7 15 v quiescent current i in nsleep=1, i ou t =0, output disable 1.1 ma i in_sleep nsleep=0, v in =5v 1 a integrated mosfets output on resistance r hs i out =500ma, v in =5v t j =25c 460 m i out =500ma, v in =2.7v t j =25c 565 680 m i out =500ma, v in =5v t j =85c 570 m i out =500ma, v in =2.7v t j =85c 700 m r ls i out =500ma, v in =5v t j =25c 395 m i out =500ma, v in =2.7v t j =25c 515 680 m i out =500ma, v in =5v t j =85c 490 m i out =500ma, v in =2.7v t j =85c 650 m body-diode forward voltage v f i out =500ma 1 v control logic uvlo threshold (rising) v in_rise 2.5 v uvlo hysteresis v hys 70 mv input logic low threshold v il 0.6 v input logic high threshold v ih 2 v nsleep logic, low v sleep_l 0.4 v nsleep logic, high v sleep_h 2 v fault output logic, low v fault_l flag triggered by otp 1ma current. 200 mv fault output leakage current i leak_fault v fault =5v 1 a constant off time t off 27 s propagation delay time (on) t on_delay inx high to outx on 10ma source current 50 150 250 ns propagation delay time (off) t off_delay inx low to outx off 50 150 250 ns
mp6507 C2.7v-to-15v, 700ma, stepper motor driver mp6507 rev. 1.05 www.monolithicpower.com 5 4/30/2018 mps proprietary information. patent protected. unauth orized photocopy and duplication prohibited. ? 2018 mps. all rights reserved. electrical characteristics (continued) v in =2.7v to 15v, t a = 25c, unless otherwise noted. parameter symbol condition min type max units cross over delay t cross hs off to ls on or ls off to hs on for one bridge arm 200 425 650 ns sleep mode wakeup time t wake sleep inactive high to full bridge turn on (v bst =100nf) 1.5 ms protection circuitry current limit sense trip voltage v trip 145 185 225 mv blanking time t blank 2.1 2.7 3.3 s thermal shutdown 165 c thermal shutdown hysteresis 15 c
mp6507 C2.7v-to-15v, 700ma, stepper motor driver mp6507 rev. 1.05 www.monolithicpower.com 6 4/30/2018 mps proprietary information. patent protected. unauth orized photocopy and duplication prohibited. ? 2018 mps. all rights reserved. typical characteristics
mp6507 C2.7v-to-15v, 700ma, stepper motor driver mp6507 rev. 1.05 www.monolithicpower.com 7 4/30/2018 mps proprietary information. patent protected. unauth orized photocopy and duplication prohibited. ? 2018 mps. all rights reserved. typical performanc e characteristics (continued) performance waveforms are tested on the evaluation board of the design example section. i out =500ma, f step =100hz, stepper motor: l=2mh, r=10, t a =25c, unless otherwise noted. ain1 2v/div. aout1 10v/div. aout2 10v/div. iouta 500ma/div. ain1 2v/div. aout1 10v/div. aout2 10v/div. iouta 500ma/div. ain1 2v/div. aout1 10v/div. aout2 10v/div. iouta 500ma/div. ain1 2v/div. aout1 10v/div. aout2 10v/div. iouta 500ma/div. sleep 5v/div. aout1 5v/div. aout2 5v/div. iouta 500ma/div. sleep 5v/div. aout1 5v/div. aout2 5v/div. iouta 500ma/div. sleep 5v/div. aout1 5v/div. aout2 5v/div. iouta 500ma/div. sleep 5v/div. aout1 5v/div. aout2 5v/div. iouta 500ma/div. steady state-full step v in =15v steady state-half step v in =15v power ramp up-full step v in =15v power ramp up-half step v in =15v sleep entry-full step v in =9v sleep recovery-full step v in =9v sleep entry-half step v in =9v sleep recovery-half step v in =9v
mp6507 C2.7v-to-15v, 700ma, stepper motor driver mp6507 rev. 1.05 www.monolithicpower.com 8 4/30/2018 mps proprietary information. patent protected. unauth orized photocopy and duplication prohibited. ? 2018 mps. all rights reserved. pin functions qfn16 pin # tssop16 pin # name description 1 3 sena channel a sense. connec t to current sensor resistor fo r channel a. 2 4 aout2 connect to motor winding a. 3 5 bout2 connect to motor winding b. 4 6 senb channel b sense. connec t to current sensor resistor fo r channel b. 5 7 bout1 connect to motor winding b. 6 8 fault logic low when in over-temperature fault condition. 7 9 bin1 gate signal input to control bout1. 8 10 bin2 gate signal input to control bout2. 9 11 bst charge pump output. co nnect a 10nf-to-100nf ceramic ca pacitor to vin 10 12 vin power supply inpu t. ranges from 2.7v to 15v. 11 13 gnd ground 12 14 vdd internal control and logic supply voltage. connect a 2.2uf capa citor from vdd to gnd. vdd is for internal use only. do not connect any extern al load to vdd pin. 13 15 ain2 gate signal input to control aout2. 14 16 ain1 gate signal input to control aout1. 15 1 nsleep sleep logic input. logic low for sleep mode and logic high to e nable the device 16 2 aout1 connec t to motor winding a
mp6507 C2.7v-to-15v, 700ma, stepper motor driver mp6507 rev. 1.05 www.monolithicpower.com 9 4/30/2018 mps proprietary information. patent protected. unauth orized photocopy and duplication prohibited. ? 2018 mps. all rights reserved. block diagram ` gate driver gate driver control logic fault report ldo motor charge pump bst vin aout1 aout2 bout1 bout2 nsleep fault ain1 ain2 bin1 bin2 v dd vin vin gate signal input vin sena windinga current sense gnd senb r senb current sense c1 c2 c3 off on windingb r sena 0.1uf 10uf 2.2uf v dd 10ko figure 1: function block diagram
mp6507 C2.7v-to-15v, 700ma, stepper motor driver mp6507 rev. 1.05 www.monolithicpower.com 10 4/30/2018 mps proprietary information. patent protected. unauth orized photocopy and duplication prohibited. ? 2018 mps. all rights reserved. operation the mp6507 is a motor driver that integrates 8 n-channel power mosfets for dual, internal full- bridges with 700ma output c urrent capability over an input voltage range of 2.7v to 15v. it can drive a stepper motor or two dc motors. the motor output current can be either controlled by an external pulse width modulator (pwm) or internal pwm current controller. the mp6507 includes the following fault protections: under-voltage lockout (uvlo) and over-temperature protection (otp). it also provides a low-power sleep mode. external pwm current control the motor current can be regulated by applying external pwm signals on the input pins ain1, ain2, bin1 and bin2. for phase a, the ain1 and ain2 input pins control the state of the aout1 and aout2; similarly for phase b, thee bin1 and bin2 input pins control the state of the bout1 and bout2. gate driver motor vin aout1 aout2 ain1 ain2 sena windinga r sena v trip figure 2: full-bridge control circuit table 1 shows the input signal logic and bridge output state. table 1: full-bridge gate logic a/bin1 a/bin2 a/bout1 a/bout2 l l high impedance high impedance l h gnd vin h l vin gnd h h gnd gnd in external pwm control mode, the windings inductive current ramps up when the high-side mosfet is on and freewheels during the high- side mosfets off time to cause the recirculation current. there are two modes for this recirculation current: slow decay and fast decay, both of which are shown in figure 3 for forward operation and figure 4 for reverse operation. vin aout1 aout2 slow decay fast decay forward figure 3: forward operation vin aout1 aout2 slow decay fast decay reverse figure 4: reverse operation for slow decay mode, the current circulates through the two low-side mosfets. for fast decay mode, the current flows through the body diodes of the other diagonal two mosfets. to configure the mp6507 for fast decay mode, apply the pwm signal to one input pin and keep
mp6507 C2.7v-to-15v, 700ma, stepper motor driver mp6507 rev. 1.05 www.monolithicpower.com 11 4/30/2018 mps proprietary information. patent protected. unauth orized photocopy and duplication prohibited. ? 2018 mps. all rights reserved. the other input pin low; for slow decay mode, apply the pwm signal to one input pin and keep the other input pin high. see table 2 for more configuration details and figure 5 for detailed waveforms. table 2: pwm control a/bin1 a/bin2 mode h (pwm) l forward l (pwm) l fast decay l h (pwm) reverse l l (pwm) fast decay h l (pwm) forward h h (pwm) slow decay l (pwm) h reverse h (pwm) h slow decay a/b in1 a/b in2 i a/bout1 forward reverse forward reverse slow decay fast decay 0 0 0 figure 5: external pwm current control waveform internal pwm current control for this control method, the motor current is regulated by an internal constant off-time pwm current control circuit as the following: ? initially, a diagonal pair of mosfets turns on so current can flow through the motor winding. ? the current increases in the motor winding, which is sensed by an external sense resistor (r sense ). during the initial blanking time t blank (3us), the high-side mosfet always turns on in spite of current limit detection. ? when the voltage across r sense reaches the internal reference voltage threshold v trip (185mv), the internal current comparator shuts off the high-side mosfet. ? the stepper motors inductance causes the current to freewheel through the two low-side mosfets (slow decay). ? during this freewheeling time, the current decreases until the internal clock reaches its constant off time (typically 27s). after that, the high-side mosfet is enabled to increase the winding current again. ? the cycle then repeats. calculate the current limit as: trip limit sense v i r ? (1) a/b in1 a/b in2 i a/bout1 forward reverse slow decay i limit constant off time t off 0 0 0 t blank i limit figure 6: internal pwm current control waveform sleep mode the mp6507 provides low-power standby sleep mode. connect the nsleep pin to logic low to enable a low-power sleep state. in this state, the two full bridges are disabled and the internal circuits such as the gate drive, internal regulator, and charge pump all shut down. connect the nsleep pin to logic high to wake up the mp6507
mp6507 C2.7v-to-15v, 700ma, stepper motor driver mp6507 rev. 1.05 www.monolithicpower.com 12 4/30/2018 mps proprietary information. patent protected. unauth orized photocopy and duplication prohibited. ? 2018 mps. all rights reserved. from sleep mode, though there is a delay time of ~1ms until the internal circuitry stabilizes. blanking time there is usually a current spike during the switching transition due to the body diodes reverse-recovery current or the distributed inductance or capacitance. this current spike requires filtering to prevent it from erroneously shutting down the high-side mosfet. an internal blanking time t blank blanks the output of the current sense comparator when the outputs are switched, which is also the minimum on time for high-side mosfet. enable if all the inputs (ain1, ain2, bin1 and bin2) are logic low, the mp6507s outputs are disabled while the charger pump and internal regulator remain active. synchronous rectifier the mp6507 enters a synchronous rectifier (sr) mode during the constant off-time period when the current limit threshold is exceeded, and the load current freewheels in slow decay sr mode. in slow decay mode, the current freewheels through one low-side mosfet and the body diode of the other low-side mosfet to short the winding. the sr mode enables both two low-side mosfets, which feature a lower voltage drop and lower power dissipation during decay operation. thermal shutdown the junction temperature of the ic is internally monitored. if the junction temperature exceeds the threshold value (typically 165oc), the converter is shut down (the fault pin goes low) and recoveries once the junction temperature drops to about 150oc (15oc hysteresis). uvlo protection the mp6507 has uvlo protection. when the vin exceeds the uvlo rising threshold, the mp6507 powers up. it shuts off when vin drops below the uvlo falling threshold.
mp6507 C2.7v-to-15v, 700ma, stepper motor driver mp6507 rev. 1.05 www.monolithicpower.com 13 4/30/2018 mps proprietary information. patent protected. unauth orized photocopy and duplication prohibited. ? 2018 mps. all rights reserved. application information driver mode: the mp6507 could be configured for both full- step and half-step modes by sequentially energizing the two windings. full-step drive energizes two winding phases at any given time. the stator windings are energized as per the sequence shown in table 3. there are a total of four steps for one cycle in the sequence (5) : ab ? a b ? a b ? ab . half-step energizes the stator windings as per the sequence shown in table 4. there are a total of 8 steps for one cycle: ab ? b ? a b ? a ? a b ? b ? ab ? a. figure 7 shows the operating waveforms for both full and half step drives. ain1 ain2 bin1 bin2 h l h l h l h l a out1-out2 b out1-out2 +v in -v in 0 +v in -v in 0 ab ab ab b ab ab ab ab a b ab aab full step half step figure 7: signal logic sequences for full-step and half-step table 3 (6) : full-step drive sequence sequence (full step) 1 2 3 4 a + + b + + a + + b + + table 4 (6) : half-step drive sequence sequence (half step) 1 2 3 4 5 6 7 8 a + + + b + + + a + + + b + + + note: 5) a means +vin between aout1 and aout2 for winding a, while a means -vin between aout1 and aout2. the same applies to winding b. 6) + item is the selected winding voltage.
mp6507 C2.7v-to-15v, 700ma, stepper motor driver mp6507 rev. 1.05 www.monolithicpower.com 14 4/30/2018 mps proprietary information. patent protected. unauth orized photocopy and duplication prohibited. ? 2018 mps. all rights reserved. pcb layout guide the printed circuit board (pcb) should use a heavy ground-plane. the mp6507 must be soldered directly onto the board for better electrical and thermal performance. the sense resistors should be placed as close as possible to the part for accurate current detection. the mp6507 uses an exposed pad, which provides a path for enhanced thermal dissipation. the thermal pad should be soldered directly to copper on the pcb. thermal vias are often used to transfer heat to other layers of the pcb. top layer bottom layer figure 8: pcb layout (tssop16-ep) design example below is a design example following the application guidelines for the specifications: table 5: design example v in 2.7v-15v i out 500ma the detailed application schematic is shown in figure 9. the typical performance and circuit waveforms have been shown in the typical performance characteristics section. for more possible applications of this device, please refer to related evaluation board data sheets. motor bst vin aout1 aout2 bout1 bout2 fault vdd v in mp6507 sena windinga senb r senb c4 c2 c1 off on windingb r sena gnd fault bin2 ain1 ain2 bin1 0.1uf 100nf 2.2uf 400mo 400mo nsleep + c5 c3 100uf 10uf figure 9: detailed application schematic
mp6507 C2.7v-to-15v, 700ma, stepper motor driver mp6507 rev. 1.05 www.monolithicpower.com 15 4/30/2018 mps proprietary information. patent protected. unauth orized photocopy and duplication prohibited. ? 2018 mps. all rights reserved. package information qfn 16 (33mm) side view top view 1 16 13 12 9 8 5 4 bottom view 2.9 0 3.1 0 1.50 1.80 2.90 3.10 1.50 1.80 0.50 bsc 0.18 0.30 0.80 1.00 0.00 0.05 0.20 ref pin 1 id marking 1.70 0.50 0.25 recommended land pattern 2.90 note: 1) all dimensions are in millimeters . 2) exposed paddle size does not include mold flash . 3) lead coplanarity shall be 0.10 millimeter max. 4) drawing conforms to jedec mo-220, variation veed-4. 5) drawing is not to scale. pin 1 id see detail a pin 1 id option a 0.30x45 o typ. pin 1 id option b r0.20 typ. detail a pin 1 id index area 0.70 0.30 0.50
mp6507 C2.7v-to-15v, 700ma, stepper motor driver mp6507 rev. 1.05 www.monolithicpower.com 16 4/30/2018 mps proprietary information. patent protected. unauth orized photocopy and duplication prohibited. ? 2018 mps. all rights reserved. qfn 16 (44mm) side view top view 1 16 13 12 9 85 4 bottom view 3.90 4.10 2.15 2.45 3.90 4.10 2.15 2.45 0.65 bsc 0.25 0.35 0.80 1.00 0.00 0.05 0.20 ref pin 1 id marking 2.30 0.65 0.35 recommended land pattern 3.80 note: 1) all dimensions are in millimeters . 2) exposed paddle size does not include mold flash . 3) lead coplanarity shall be 0.10 millimeter max. 4) jedec reference is mo-220, variation vggc. 5) drawing is not to scale . pin 1 id see detail a pin 1 id option a 0.45x45 o typ. pin 1 id option b r0.25 typ. detail a pin 1 id index area 1.00 0.50 0.70
mp6507 C2.7v-to-15v, 700ma, stepper motor driver mp6507 rev. 1.05 www.monolithicpower.com 17 4/30/2018 mps proprietary information. patent protected. unauth orized photocopy and duplication prohibited. ? 2018 mps. all rights reserved. package information tssop16-ep (5.06.4mm) front view side view bottom view detail "a" note: 1) all dimensions are in millimeters . 2) package length does not include mold flash, protrusion or gate burr. 3) package witdh does not include interlead flash or protrusion. 4) lead coplanarity (bottom of leads after forming) shall be 0.10 millimeters max. 5) drawing conforms to jedec mo-153, variation abt. 6) drawing is not to scale. pin 1 id top view recommended land pattern see detail "a"
mp6507 C2.7v-to-15v, 700ma, stepper motor driver notice: the information in this document is subject to change without notice. please contact mps for current specifications. users should warrant and guarant ee that third party intellectua l property rights are not infringed upon when integrating mps products into any application. mps will not assume any legal re sponsibility for any said applications. mp6507 rev. 1.05 www.monolithicpower.com 18 4/30/2018 mps proprietary information. patent protected. unauth orized photocopy and duplication prohibited. ? 2018 mps. all rights reserved. tssop16 note: 1) all dimensions are in millimeters . 2) package length does not include mold flash , protrusion or gate burr. 3) package width does not include interlead flash or protrusion. 4) lead coplanarity (bottom of leads after forming ) shall be 0.10 millimeters max. 5) drawing conforms to jedec mo-153, variation ab. 6) drawing is not to scale . 0.19 0.30 4.90 5.10 seating plane 0.65 bsc pin 1 id 4.30 4.50 6.20 6.60 18 9 16 0.80 1.05 1.20 max 0.05 0.15 top view front view side view 0.09 0.20 recommended land pattern 5.80 typ 1.60 typ 0.40 typ 0.65 bsc see detail "a" detail a 0.45 0.75 0 o -8 o 0.25 bsc gauge plane

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