october 2003 1/7 tda8172 tv vertical deflection output circuit features n power amplifier n flyback generator n thermal protection description the tda8172 is a monolithic integrated circuit in heptawatt tm package. it is a high efficiency power booster for direct driving of vertical windings of tv yokes. it is intended for use in color and black & white television as well as in monitors and displays. pin connection (top view) block diagram heptawatt (plastic package) order code: tda8172 1
tda8172 2/7 1 absolute maximum ratings note 1: this occurs during the first part of flyback pulse 2 thermal data 3 electrical characteristics (refer to the test circuits, v s = 35v, t amb = 25c unless otherwise specified) symbol parameter value unit v s supply voltage (pin 2) 35 v v 5 , v 6 flyback peak voltage 60 v v 3 voltage at pin 3 (see note 1 ) v s + 3 v v 1 , v 7 amplifier input voltage v s - 0.5 v i 0 output peak current (non repetitive, t = 2ms) 2.5 a i 0 output peak current at f = 50 to 200 hz, t 10s 5 a i 0 output peak current at f = 50 to 200 hz, t > 10s 2 a i 3 pin 3 dc current at v 5 < v 2 100 ma i 3 pin 3 flyback current at f = 50 to 200 hz, t fly 1.5ms 1.5 a i 3 pin 3 sink current at f = 50 to 200 hz, t 10s 5 a p tot total power dissipation at t case = 90 c 20 w t stg , t j storage and junction temperature -40, +150 c symbol parameter value unit r th(j-c) thermal resistance junction-case 3 c/w symbol parameter test conditions min. typ. max. unit fig. i 2 pin 2 quiescent current i 3 = 0, i 5 = 0 816ma1 i 6 pin 6 quiescent current i 3 = 0, i 5 = 0 16 36 ma 1 i 1 amplifier input bias current v 1 = 1 v, v 7 = 2 v - 0.1 - 1 a 1 v 1 = 2 v, v 7 = 1 v - 0.1 - 1 a 1 v 3l pin 3 saturation voltage to gnd i 3 = 20 ma 1 1.5 v 3 v 5 quiescent output voltage v s = 35v, r a = 39 k w 18 v 4 v 5l output saturation voltage to gnd i 5 = 1.2 a 11.4v 3 i 5 = 0.7 a 0.7 1 v 3 v 5h output saturation voltage to supply - i 5 = 1.2 a 1.6 2.2 v 2 - i 5 = 0.7 a 1.3 1.8 v 2 t j junction temperature for thermal shutdown 140 c 1
tda8172 3/7 figure 1. measurement of i 1 , i 2 , i 6 s1: (a) i2 and i6 ; (b) i1 figure 2. measurement of v 5h figure 3. measurement of v 3l , v 5l s: (a) v3l ; (b) v5l figure 4. measurement of v 5 i 2 i 6 +v s 10k w a b s 1v i 1 v 7 7 4 5 6 2 1 tda8172 +v s v 5h 1v v 7 -i 5 1 2 6 5 4 7 tda8172 +v s i 3 or i 5 s1 a b v 5l v 3l v 7 2 6 3 5 4 7 1 tda8172 tda8172 12k w 2v +v s v 5 r a v 7 12k w 5.6k w 1 2 6 5 4 7
tda8172 4/7 figure 5. ac test circuit t o ly * r eco mm ended for v filtering ref tda8172 v s c1 0.1 m f c2 470 m f d1 1n4001 c3 220 m f 2 63 5 7 1 4 v ref r1 10k w rt1 4.7k w vi gnd t 0 in r2 5.6k w r3 12k w c6 4.7 m f r4 8.2k w c5 2200 m f r5ly t 0 r5 8.2 w ry 9.6 w 330 w r6 1.5 w r7 c4 0.22 m f ly 24.6mh v 7 t fly
tda8172 5/7 4 mounting instructions the power dissipated in the circuit is removed by adding an external heatsink. with the heptawatt ? package, the heatsink is simply attached with a screw or a compression spring (clip). a layer of silicon grease inserted between heatsink and package optimizes thermal contact ; no electrical isolation is needed between the two surfaces since the tab is connected to pin 4 which is ground. figure 6. mounting examples
tda8172 6/7 5 package mechanical data 9 pins - plastic heptawatt dimensions millimeters inches min. typ. max. min. typ. max. a 4.8 0.189 c 1.37 0.054 d 2.4 2.8 0.094 0.110 d1 1.2 1.35 0.047 0.053 e 0.35 0.55 0.014 0.022 f 0.6 0.8 0.024 0.031 f1 0.9 0.035 g 2.41 2.54 2.67 0.095 0.100 0.105 g1 4.91 5.08 5.21 0.193 0.200 0.205 g2 7.49 7.62 7.8 0.295 0.300 0.307 h2 10.4 0.409 h3 10.05 10.4 0.396 0.409 l 16.97 0.668 l1 14.92 0.587 l2 21.54 0.848 l3 22.62 0.891 l5 2.6 3 0.102 0.118 l6 15.1 15.8 0.594 0.622 l7 6 6.6 0.236 0.260 m 2.8 0.110 m1 5.08 0.200 dia. 3.65 3.85 0.144 0.152 a c l5 d1 l3 l2 d mm1 e l1 l g2 g1 g f h2 f1 l6 l7 dia. h3
tda8172 7/7 i information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specifications mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectronics. the st logo is a registered trademark of stmicroelectronics ? 2003 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - brazil - canada - china - finland - france - germany - hong kong - india - israel - italy - japan malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - u.s.a. www.st.com 2
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