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september 2003 1/15 version 2.5 STV9302 vertical deflection output for monitor / tv 2 app / 60 v with flyback generator features ? power amplifier ? flyback generator ? output current up to 2 app ? thermal protection description the STV9302 is a vertical deflection booster designed for monitor and tv applications. this device, supplied with up to 32 v, provides up to 2 app output current to drive the vertical deflection yoke. the internal flyback generator delivers flyback voltages up to 60 v. pin connection (top view) block diagram heptawatt (plastic package) order code: STV9302 7 6 5 4 3 2 1 tab connected input (non inverting) output stage supply output ground or negative supply flyback generator supply voltage input (inverting) to pin 4 1 thermal protection 6 4 3 5 STV9302 + - power amplifier 7 2 flyback generator inverting non-inverting input input ground or negative supply output flyback generator output stage supply voltage supply 1
STV9302 2/15 1 absolute maximum ratings note 1: usually, the flyback voltage is close to 2.v s this must be taken into consideration when setting v s. note 2: versus pin 4 note 3: v3 is higher than v s during the first half of the flyback pulse note 4: this repetitive output peak current is usually observed just before and after the flyback pulse. note 5: this non-repetitive output peak current can be observed, for example, during the switch-on/switch-off phases. this peak current is acceptable providing the soa is respected ( figure 8 and figure ) note 6: all pins have a reverse diode towards pin 4, these diodes should never be forward-biased 2 thermal data symbol parameter value unit voltage v s supply voltage (pin 2) - note 1 and note 2 35 v v 5 , v 6 flyback peak voltage - note 2 60 v v 3 voltage at pin 3 - note 2 , note 3 and note 6 -0.4 to (v s + 3) v v 1 , v 7 amplifier input voltage - note 6 - 0.4 to +v s v current i 0 (1) output peak current at f = 50 to 200 hz, t 10s - note 4 5 a i 0 (2) output peak current non-repetitive - note 5 2 a i 3 sink sink current, t<1ms - note 3 1.5 a i 3 source source current, t < 1ms 1.5 a i 3 flyback pulse current at f=50 to 200 hz, t 10 m s - note 4 5 a esd susceptibility esd1 human body model (100pf discharge through 1.5k w )2kv esd2 eiaj norm (200pf discharge through 0 w )300v temperature t o operating ambient temperature -20 to 75 c t s storage temperature -40 to 150 c t j junction temperature +150 c symbol parameter value unit r th(j-c) thermal resistance junction-case 3 c/w t t temperature for thermal shutdown 150 c t jr recommended max. junction temperature 120 c 1
STV9302 3/15 3 electrical characteristics (v s = 35v, t amb = 25c, unless otherwise specified) note 7: when (v2-v4) = 30v, the flyback peak voltage on pin 5 is approximatively equal to 60 v. symbol parameter test conditions min. typ. max. unit fig. supply vs operating supply voltage range (v 2 -v 4 ) note 7 10 30 v i 2 pin 2 quiescent current i 3 = 0, i 5 = 0 520ma1 i 6 pin 6 quiescent current i 3 = 0, i 5 = 0, v 6 =35v 81950ma1 input i 1 input bias current v 1 = 1 v, v 7 = 2.2 v - 0.6 -1.5 a 1 i 7 input bias current v 1 = 2.2 v, v 7 = 1 v - 0.6 -1.5 a v i0 offset voltage 2 mv d v i0 /dt offset drift versus temperature -10 v/c output i 0 operating peak output current 1 a v 5l output saturation voltage to pin 4 i 5 = 1a 1 1.4 v 3 v 5h output saturation voltage to pin 6 i 5 =- 1a 1.6 2.2 v 2 miscellaneous g voltage gain 80 db v d5-6 diode forward voltage between pins 5-6 i 5 = 1a 1.4 2 v v d3-2 diode forward voltage between pins 3-2 i 3 = 1a 1.3 2 v v 3sl saturation voltage on pin 3 i 3 = 20ma 0.4 1 v 3 v 3sh saturation voltage to pin 2 (2nd part of fly- back) i 3 = -1a 2.1 v
STV9302 4/15 figure 1. measurement of i 1 , i 2 , i 6 figure 2. measurement of v 5h figure 3. measurement of v 3l , v 5l 1v (a) 10k w 5 1 (b) i1 (a) : i2 and i6 measurement (b) : i1 measurement s +vs 2 6 i2 i6 4 7 2.2v STV9302 - i5 5 1v 7 2.2v 1 4 +vs 2 6 v 5h STV9302 +vs i3 or i5 3 5 v 5l v 3l (a) (b) (a) : v 5l measurement (b) : v 3l measurement STV9302 1v 7 4 2 6 2.2v 1
STV9302 5/15 4 application hints the yoke can be coupled either in ac or dc. 4.1 dc-coupled application when dc coupled (see figure 4 ), the display vertical position can be adjusted with input bias. on the other hand, 2 supply sources (v s and -v ee ) are required. figure 4. dc coupled application r3 +vs r2 r1 rd(*) yo k e ly vertical position adjustment -v ee vref (*) recommended: ly 50 m s ------------- -rd ly 20 m s ------------- - < < 0.1f 0.1f c f (47 to 100f) power amplifier flyback generator thermal safety 470f 470f output current output voltage i p 7 32 5 6 1 4 v m v m + - 0.22f 1.5 w
STV9302 6/15 application hints ? for calculations, treat the ic as an op-amp, where the feedback loop maintains v 1 = v 7 : centring display will be centred (null mean current in yoke) when voltage on pin 7 is: peak current ? example: for v m =2v, v m = 5 v and i p =1a choose r 1 in the1 w range, for instance r 1 =1 w from equation of peak current: then choose r 2 or r 3 . for instance if r 2 = 10 k w then r 3 =15 k w ? finally, bias voltage on pin 7 should be: (r 1 is negligible) v 7 v m v m + 2 ------------------------ r 2 r 2 r 3 + --------------------- - = i p v m v m C () 2 ---------------------------- - r 2 r 1 x r 3 ----------------- = r 2 r 3 ------- 2i p r 1 v m v m C ----------------------------- 2 3 -- - = = v 7 v m v m + 2 ------------------------ 1 1 r 3 r 2 ------- + ----------------- 3.5 2 ------- - 1 2.5 ------- - 0.7v = = =
STV9302 7/15 ripple rejection when both ramp signal and bias are provided by the same driver ic, you can gain natural rejection of any ripple caused by a voltage drop in the ground (see figure 5 ), if you manage to apply the same fraction of ripple voltage to both booster inputs. for that purpose, arrange an intermediate point in the bias resistor bridge, such that (r 8 / r 7 ) = (r 3 / r 2 ), and connect the bias filtering capacitor between the intermediate point and the local driver ground. of course, r 7 should be connected to the booster reference point, which is the ground side of r 1 . figure 5. ripple rejection r 3 r 2 r 1 rd yo k e ly power amplifier flyback generator thermal safety 7 32 5 6 1 4 + - r 7 r 8 r 9 reference voltage ramp signal driver ground source of ripple
STV9302 8/15 4.2 ac-coupled applications (see figure 6 ) in ac-coupled application, only one supply (v s ) is needed. the vertical position of the scanning cannot be adjusted with input bias (for that purpose, usually some current is injected or sunk with a resistor in the low side of the yoke). figure 6. ac-coupled application r 3 +vs r 2 r 1 rd(*) yo k e ly (*) recommended: ly 50 m s ------------- -rd ly 20 m s ------------- - < < 0.1f c f (47 to 100f) power amplifier flyback generator thermal safety 470f output current output voltage i p 7 32 5 6 1 4 v m v m + - c s r 4 c l r 5 0.22f 1.5 w
STV9302 9/15 application hints ? gain is defined as in the previous case: ? choose r 1 then either r 2 or r 3 ? for good output centering, v 7 must fulfill the following equation: or c s performs an integration of the parabolic signal on c l , therefore the amount of s correction is set by the combination of c l and c s . 4.3 application with differential-output drivers some driver ics provide the ramp signal in differential form, as two current sources i + and i - with opposite variations. let us set some definitions : ? i cm is the common-mode current : ? at peak of signal, i + =i cm +i p and i - =i cm -i p , therefore the peak differential signal is i p - (-i p )=2i p , and the peak-peak differential signal, 4i p . the application is described in figure 7 with dc yoke coupling. the calculations still rely on the fact that v 1 remains equal to v 7 . centring when idle, both driver outputs provide i cm and the yoke current should be null, hence: (r 1 is negligible) peak current scanning current should be ip when positive and negative driver outputs provide respectively i cm -i p and i cm +i p , therefore and since r 7 = r 2 : choose r 1 in the 1 w range, the value of r 2 = r 7 follows. remember that i is one-quarter of driver peak- peak differential signal ! also check that the voltages on the driver outputs remain inside allowed range. i p v m v m C 2 ------------------------ r 2 r 1 r 3 --------------------- - = v s 2 ------- -v 7 C r 4 r 5 + --------------------- - v 7 v m v m + 2 ------------------------ C r 3 -------------------------------------- v 7 r 2 ------- + = v 7 1 r 3 ------- ? 1 r 2 ------- + 1 r 4 r 5 + --------------------- - t v s 2r 4 r 5 + () ------------------------------ v m v m + 2r 3 ------------------------ + = + i cm 1 2 -- -i + i - + () = i cm r 7 i cm r 2 therefore r 7 r 2 = = i cm i C () r 7 i p r 1 i cm i + () r 2 + = i p i ---- - 2r 7 r 1 ----------- C =
STV9302 10/15 ? example : for i cm = 0.4ma, i = 0.2ma (corresponding to 0.8ma of peak-peak differential current), i p =1a choose r 1 = 0.75 w , it follows r 2 = r 7 = 1.875k w . ripple rejection make sure to connect r 7 directly to the ground side of r 1 . figure 7. using a differential-output driver +vs r 2 r 1 rd(*) yo k e ly -v ee 0.22f (*) recommended: ly 50 m s ------------- -rd ly 20 m s ------------- - < < 0.1f 0.1f c f (47 to 100f) power amplifier flyback generator thermal safety + - 470f 470f output current output voltage i p 7 32 5 6 1 4 r 7 + - differential output driver ic i p i cm -i p i cm 1.5 w
STV9302 11/15 the diagram has been arbitrarily limited to max v s (35 v) and max i 0 (2 a) figure 8. output transistor safe operating area (soa) for secondary breakdown figure 9. secondary breakdown temperature derating curve (isb = secondary breakdown current) 100 m s 10ms 100ms 0.01 0.1 1 10 10 60 100 volts ic(a) @ tcase=25c 35
STV9302 12/15 5 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. in dc- coupled applications we recommend to use a silicon tape between the device tab and the heatsink to isolate electrically the heatsink. figure 10. mounting examples
STV9302 13/15 6 pin configuration figure 11. pins 1 and 7 figure 12. pin 3 figure 13. pins 5 and 6 1 7 2 3 2 6 5 4 2
STV9302 14/15 7 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
tda9302 15/15 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 stmicroelectron- ics. specifications mentioned in this publication are subject to change without notice. this publication supersedes and re- places all information previously supplied. stmicroelectronics products are not authorized for use as critical components in life support devices or systems without the express written approval of stmicroelectronics. the st logo is a registered trademark of stmicroelectronics 2003 stmicroelectronics - all rights reserved. purchase of i 2 c components by stmicroelectronics conveys a license under the philips i 2 c patent. rights to use these components in an i 2 c system is granted provided that the system conforms to the i 2 c standard specification as defined by philips. 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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