unisonic technologies co., ltd t78040 linear integrated circuit www.unisonic.com.tw 1 of 5 copyright ? 2012 unisonic technologies co., ltd qw-r121-013.c vertical deflection output circuit ? description the utc t78040 is a monolithic integrated circuit and designed for use in high-definition tv and crt monitors. it is intended to directly drive the deflection co il. besides, the t78040 offers a maximum deflection current of 1.8a peak to peak to suitable for small to medium diameter crts. ? features * deflection current can be 1.8a peak value * deflection voltage up to 70v * flyback generator * thermal protection circuit * low cross-over distortion * supports dc coupling ? ordering information ordering number package packing lead free halogen free t78040l-tb7-t t78040g-tb7-t to-220z7 tube
t78040 linear integrated circuit unisonic technologies co., ltd 2 of 5 www.unisonic.com.tw qw-r121-013.c ? pin configurations tab connected to pin 4 5 6 7 4 3 2 1 non-inverting input output stage supply output ground flyback generator supply voltage inverting input ? block diagram
t78040 linear integrated circuit unisonic technologies co., ltd 3 of 5 www.unisonic.com.tw qw-r121-013.c ? absolute maximum ratings (t a = 25 ) parameter symbol ratings unit supply voltage (pin 2 to pin4) v cc 2 34 v output peak power supply voltage (pin 5 to pin 4) v cc 6 70 v output peak current i 5ma x -1.5 ~ +1.5 a power dissipation p d 9 w junction temperature t j 150 operating temperature t opr -20 ~ +85 storage temperature t stg -40 ~ +150 note: 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. ? theraml data parameter symbol ratings unit junction to case jc 4.0 c/w ? electrical characteristics (t a = 25 , v cc = 24v, unless otherwise specified) parameter symbol test conditions min typ max unit supply voltage v cc 16 24 33 v output saturated voltage to gnd v s5-4 i 5 =0.9a 1.3 v output saturated voltage to supply v s5-6 i 5 =-0.9a 3.2 v saturation voltage on pin 3 v s3-4 i 3 = 20ma 1.8 v saturation voltage to pin 3 (2nd part of flyback) v s3-2 i 3 = -0.9a 3.0 v output middle point voltage v o ( mid ) 11 12 13 v quiescent current i q 35 65 ma recommend biggest deflect current i5 p-p 1.8 a
t78040 linear integrated circuit unisonic technologies co., ltd 4 of 5 www.unisonic.com.tw qw-r121-013.c ? application circuits for ac coupling (single power supply) +v cc 1 2 6 3 5 7 flyback generator 4 + - thermal protection power amplifier deflection coil drive stage output stage c f r1 + - v ref 2.2v r2 r4 c s r3 c l r5 0.22 f for dc coupling (dual power supply) 0.47 300
t78040 linear integrated circuit unisonic technologies co., ltd 5 of 5 www.unisonic.com.tw qw-r121-013.c 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 expec ted 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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