unisonic technologies co., ltd 51494 linear integrated circuit www.unisonic.com.tw 1 of 5 copyright ? 2012 unisonic technologies co., ltd qw-r103-005.ba ? description the utc 51494 is a monolithic bipolar integrate circuit that provides same 494 function and built in power good signal circuit for easy using 51494 can be easily implemented by just adding a capacitor. ? features * fully integrated with compact 16-pin dip * all necessary functions included for most popular half bridge circuit. * built-in power good delay and power fail lead function. * power good delay time is linearly. * proportional to external capacitor value. * reduced external components for cost down and components for cost down and compact size. dip-16 sop-16 ? ordering information ordering number package packing lead free halogen free 51494l-s16-r 51494g-s16-r sop-16 tape reel 51494l-s16-t 51494g-s16-t sop-16 tube 51494L-D16-T 51494g-d16-t dip-16 tube
51494 linear integrated circuit unisonic technologies co., ltd 2 of 5 www.unisonic.com.tw qw-r103-005.ba ? pin assignment 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ea1+ ea1- ea0 d t c t rt gnd c1 gnd c pg c2 v cc p.g. v ref ea2- ea2+ pin name function 1 ea1+ error amplifier noninverting input, same as pin 1 of 494 2 ea1- error amplifier inverting input, same as pin 2 of 494 3 ea0 error amplifier output and feedback, same as pin 3 of 494 4 d t dead time control input, same as pin 4 of 494 5 c t connect capacitor to oscillator circuit fo r operating frequency, same as pin 5 of 494 6 r t connect resistor to oscillator circuit for operating frequency, same as pin 6 of 494 7 gnd ground terminal of ic, same as pin 7 of 494 8 c1 collector of output transistor one, same as pin 8 of 494 9 gnd ground terminal of ic 10 c pg terminal for capacitor to determine power good delay time 11 c2 collector of output transistor two, same as pin 11 of 494 12 v cc supply voltage, same as pin 12 of 494 13 p.g. output for power good signal 14 v ref reference voltage output, same as pin 14 of 494 15 ea2- error amplifier inverting input, same as pin 15 of 494 16 ea+ error amplifier noninverting input, same as pin 16 of 494
51494 linear integrated circuit unisonic technologies co., ltd 3 of 5 www.unisonic.com.tw qw-r103-005.ba ? block diagram reference regulator osc + - + - + - + - - + tf.e 12 v cc 14 ref out 7 6 5 4 1 2 16 15 3 gnd r t c t dead-time control non-inv input inv input non inv input inv input feed-back 10 13 9 11 8 dead time comparator pwm comparator ea1 ea2 1.25v c pg p.g. c1 c2 gnd
51494 linear integrated circuit unisonic technologies co., ltd 4 of 5 www.unisonic.com.tw qw-r103-005.ba ? absolute maximum ratings (unless otherwise specified, all is ov er operating free-air temperature range) characteristic symbol rating unit supply voltage v cc 42 v voltage from any pin to ground (except pin8 & pin11) v in v cc +0.3 v collector output voltage v c1 , v c2 42 v peak collector output i c1 , i c2 250 ma power dissipation p d 1500 mw operating temperature t opr 0 ~ +70 storage temperature t stg -40 ~ +150 junction temperature t j 125 note: 1. absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only an d functional device operat ion is not implied. ? electrical characteristics (unless otherwise specified, t a =0~70 , v cc =15v, f=10khz) parameter symbol test conditions min typ max unit reference section reference voltage v ref i ref =1.0ma 4.75 5 5.25 v line regulation v line 7v 51494 linear integrated circuit unisonic technologies co., ltd 5 of 5 www.unisonic.com.tw qw-r103-005.ba ? electrical characteristics(cont.) parameter symbol test conditions min typ max unit output section collector off-state current i c ( off ) v cc =v c =40v,v e =0 2 100 a emitter off-state current i e ( off ) v cc =v c =40v,v e =0 -100 a output saturation voltage common-emitter v ce ( sat ) v e =15v, l c =200ma 1.1 1.3 v output control (pin13) standby power supply current i cc 6 10 ma output ac characteristic raise time common-emitter t r 100 200 ns fall time common-emitter t r 25 100 ns pwm comparator section inhibit threshold voltage v thi zero duty cycle 4 4.5 v output source current i o + 0.5v < v3 < 3.5v 2 ma output sink current i o - 0.5v < v3 < 3.5v -0.2 -0.6 ma power good section power good delay time t pd c d = 1 f 230 280 330 ms c d = 0.47 f 108 130 160 power fail lead time t p1 4 ms output high voltage v oh v pinn = 5v, i l = 1ma 4.75 v output saturation voltage v sat v pinn = 5v, i sink = 4ma 0.4 v output leakage current i oh 100 a 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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