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unisonic technologies co., ltd L6219 linear integrated circuit www.unisonic.com.tw 1 of 6 copyright ? 2005 unisonic technologies co., ltd qw-r109-005,b dual full-bridge pwm motor driver description the L6219 motor driver is designed to drive both windings of a bipolar stepper motor or bidirectionally control two dc motors. both bridges are capable of sustaining 45v and include internal pulse-width modulation (pwm) cont rol of the output current to 750ma .the outputs have been optimized for a low output saturation voltage drop (less than 1.8v total source plus sink at 500ma ). for pwm current control, t he maximum output current is determined by the user?s select ion of a reference voltage and sensing resistor. two logic-level i nputs select output current limits of 0, 33, 67,or 100% of the maxi mum level. a phase input to each bridge determines load current direction. the bridges include both ground clamp and flyback diodes for protection against inductive transie nts. internally generated delays prevent cross-over currents when swit ching current direction. special power-up sequencing is not required. thermal protection circuitry disables the outputs if the chip temperature exceeds safe operating limits. features *interchangeable with sgs L6219 *750ma continuous output current *45v output sustaining voltage *internal clamp diodes *internal pwm current control *low output saturation voltage *internal thermal shutdown circuitry sop-24 *pb-free plating product number: L6219l ordering information order number normal lead free plating package packing L6219-s24-r L6219l-s24-r sop-24 tape reel L6219-s24-t L6219l-s24-t sop-24 tube L6219l-s24-r (1)packing type (2)package type (3)lead plating (1) r: tape reel, t: tube (2) s24: sop-24 (3) l: lead free plating, blank: pb/sn
L6219 linear integrated circuit unisonic technologies co., ltd 2 of 6 www.unisonic.com.tw qw-r109-005,b pin configuration ground ground sense 2 r c2 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 v ref2 phase 2 i 12 i 02 out 2b comp in 2 out 2a out 1a load supply sense 1 comp in 1 out 1b i 01 ground ground i 11 phase 1 v ref1 r c1 logic supply vcc pwm2 pwm1 2 1 v bb 1 2 pwm current-control circuitry i 0 i 1 channel 1 terminal numbers shown 40k ? 23 24 15 20 17 22 - + one shot source disable 10k ? 20k ? v bb outa outb v ref sense r s r c c c r t c t r c 10 comp in 1 21 14 truth table phase outa outb h h l l l h
L6219 linear integrated circuit unisonic technologies co., ltd 3 of 6 www.unisonic.com.tw qw-r109-005,b typical application from ? p v bb + stepper motor +5v from ? p v ref r t c t v ref r s rc cc r s rc cc 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 vcc pwm2 pwm1 2 1 v bb 1 2 r t c t
L6219 linear integrated circuit unisonic technologies co., ltd 4 of 6 www.unisonic.com.tw qw-r109-005,b absolute maximum ratings (ta = 25 )
parameter symbol ratings unit motor supply voltage v bb 45 v peak 1.0 a output current continuous i out 750 ma logic supply voltage v cc 7.0 v logic input voltage range v in -0.3 ~ +7.0 v output emitter voltage v sense 1.5 v package power dissipation p d see graph junction temperature t j 125 c operating temperature t opr -20~+85 c storage temperature t stg -40 ~ +150 c note 1.absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device operation is not implied. 2.the device is guaranteed to meet performance specification within 0
~+70 c operating temperature range and assured by design from -20
~+85 c. 3.output current rating may be limited by duty cycle, am bient temperature, and heat sinking. under any set of conditions, do not exceed the specified peak curr ent rating or a junction temperature of +150 c electrical characteristics (ta=25 c, v cc =4.75v to 5.25v, v bb =45v, t j 150 c, v ref =5.0v) parameter symbol test conditions min typ max unit output drivers(outa or outb) motor supply range v bb 10 - 45 v v out =v bb - <1.0 50 a output leakage current i leak v out =0 - <-1.0 -50 a output sustaining voltage v ce(sus) i out = 750ma,l=3.0mh 45 - - v sink driver, i out =+500ma - 0.4 0.6 v sink driver, i out =+750ma - 1.0 1.2 v source driver, i out = -500ma - 1.0 1.2 v output saturation voltage v ce(sat) source driver, i out = -750ma - 1.3 1.5 v clamp diode leakage current i r v r =45v - <1.0 50 a clamp diode forward voltage v f i f =750ma - 1.6 2.0 v i bb(on) both bridges on, no load - 20 25 ma driver supply current i bb(off) both bridge off - 5.0 10 ma control logic v in(1) all inputs 2.4 - - v input voltage v in(0) all inputs - - 0.8 v v in =2.4v - <1.0 20 a input current i in(1) v in =0.8v - -3.0 -200 a reference voltage range v ref operating 1.5 - 7.5 v i 0 =i 1 =0.8v 9.5 10 10.5 - i 0 =2.4v,i 1 =0.8v 13.5 15 16.5 - current limit threshold (at trip point) v ref /v compin i 0 =0.8v,i 1 =2.4v 25.5 30 34.5 - i cc(on) i 0 =i 1 =0.8v ,no load - 40 50 total logic supply current i cc(off) i 0 =i 1 =2.4v ,no load - 10 12 ma thermal shutdown temperature t shdn - 170 - c
L6219 linear integrated circuit unisonic technologies co., ltd 5 of 6 www.unisonic.com.tw qw-r109-005,b pwm current control the L6219 dual bridge is designed to driv e both windings of a bipolar stepper motor. output current is sensed and controlled independently in each bridge by an external sense resistor (rs), internal comparator, and monostable multivibrator. when the bridge is turned on, current increases in the motor winding and it is sensed by the external sense resistor until the sense voltage (v compin ) reaches the level set at the comparator?s input :i trip =v ref /10rs the comparator then triggers the monostable which turns o ff the source driver of t he bridge. the actual load current peak will be slightly higher than the trip point (es pecially for low-inductance loads) because of the internal logic and switching delays. this delay (td)is typically 2s. after turn-off, the mo tor current decays, circulating through the ground-clamp diode and sink transistor. the source driver?s off time (and t herefore the magnitude of the current decrease)is determined by t he monostable?s external r c timing components, where t off =r t c t within the range of 20k ? to 100k ? and 100pf to 1000pf when the source driver is re-enabled, the winding current (the sense voltage) is again allowed to rise to the comparator?s threshold. this cycle repeats itself, mainta ining the average motor winding current at the desired level. loads with high distributed capacitances may result in high turn-on current peaks. this peak (appearing across rs) will attempt to trip the comparator, resulting in erroneous current control or high-frequency oscillations. an external r c c c time delay should be used to further delay t he action of the comparator. depending on load type, many applications will not require these exte rnal components (sense connected to comp in). pwm output current wave form v phase i trip t off t d + - 0 i out load current paths v bb r s bridge on source off all off
L6219 linear integrated circuit unisonic technologies co., ltd 6 of 6 www.unisonic.com.tw qw-r109-005,b typical characteristic 25 0.5 50 100 1.0 1.5 2.5 75 0 125 150 temperature, in
2.0 r jt =6
/w allowable package power dissipation in watts r jt =55
/w utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.

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