june 2004 revision 1.4 1/10 ? STV9382 optimwatt tm class-d vertical deflection amplifier for 1.5 amp tv applications main features high-efficiency optimwatt tm power amplifier no heatsink split supply internal flyback generator output current up to 1.5 a pp suitable for dc coupling applications few external components protection against low v cc description designed for tv applications, the optimwatt tm STV9382 is a class-d vertical deflection booster assembled in a 20-pin plastic dip package. it belongs to the optimwatt tm class-d vertical deflection booster family. it operates with supplies up to 18 v and provides an output current up to 1.5 a pp to drive the yoke. the internal flyback generator avoids the need for an extra power supply. pdip 20 order code: STV9382 -v cc -v cc -v cc -v cc -v cc -v cc -v cc pow + v cc pow +v cc eaout in+ in- sgnd out cfly + cfly - boot feedcap1 feedcap freq 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 7 obsolete product(s) - obsolete product(s) obsolete product(s) - obsolete product(s)
pin functions optimwatt tm STV9382 2/10 1 pin functions 2 functional description the STV9382 is a vertical deflection circuit operating in class d. class d is a modulation method where the output transistors work in switching mode at high frequency. the output signal is restored by filtering the output square wave with an external lc filter. the major interest of this ic is the comparatively low power dissipation in regards to traditional amplifiers operating in class ab, eliminating the need of an heatsink. except for the output stage which uses class d modulation, the circuit operation is similar to the one of a traditional linear vertical amplifier. a (sawtooth) reference signal has to be applied to the circuit which can accept a differential or single ended signal. this sawtooth is amplified and applied as a current to the deflection yoke. this current is measured by means of a low value resistor. the resulting voltage is used as a feedback signal to guarantee the conformity of the yoke current with the reference input signal. the overvoltage necessary for a fast retrace is obtained with a chemical capacitor charged at the power supply voltage of the circuit. at the flyback moment, this capacitor is connected in series with the output stage power supply. this method, used for several years with the linear vertical boosters and called ?internal flyback? or ?flyback generator?, avoids the need of an additional power supply, while reducing the flyback duration. the circuit uses a bcd process that combines bipolar, cmos and dmos devices. the output stage is composed of low-r on n-channel dmos transistors. table 1: STV9382 pin descriptions pin name function pin name function 1-v cc negative supply 11 sgnd signal ground 2-v cc negative supply 12 in- error amplifier inverting input 3-v cc negative supply 13 in+ error amplifier non-inverting input 4 out pwm output 14 ea out error amplifier output 5 cfly+ flyback capacitor 15 +v cc positive supply 6 cfly- flyback capacitor 16 +v cc pow positive power supply 7 boot bootstrap capacitor 17 -vccpow negative power supply 8 feedcap1 feed-back integrating capacitor 18 -v cc negative supply 9 feedcap feed-back integrating capacitor 19 -v cc negative supply 10 freq frequency setting capacitor 20 -v cc negative supply obsolete product(s) - obsolete product(s) obsolete product(s) - obsolete product(s)
3/10 optimwatt tm STV9382 functional description figure 1: test and application circuit diagram flyback flyback output + _ drive generator detection +vcc +vcc power cflyback cfly+ in+ in - 1k ? 10k ? ea out -vcc power -vcc -vcc boot cboot 470nf 330pf freq feedcap sgnd pins 1 ,2 ,3 ,18 ,19 and 20 out 0.9 ? deflection yoke* cfly- +vcc 1mh input signal 1k ? 220nf 100nf 100nf 1000 f 1000 f 100 f 14 11 9 17 150 ? 15 16 STV9382 5 6 7 4 13 12 56 ? 10 v ref -vcc 220pf * deflection yoke characteristics: r = 9 ? , l = 12mh 100nf 8 560pf 1f f vert = 50 hz feedcap1 modulator obsolete product(s) - obsolete product(s) obsolete product(s) - obsolete product(s)
absolute maximum ratings optimwatt tm STV9382 4/10 3 absolute maximum ratings note: 1 except pin 6 (+1.4kv/-2kv) 2 during the flyback with v cc = 18 v, the maximum output voltage (pin 4) is close to 72 v, with respect to -v cc (pins 1, 2, 3, 18, 19 and 20). 4thermal data pins 1, 2, 3, 18, 19 and 20 are internally c onnected together and partici pate in heat evacuation. figure 2: thermal resistance with ?on-board? square heatsink vs. copper area symbol parameter value unit v cc dc supply voltage 20 v t stg , t j storage and junction temperature -40 to +150 c t op operating temperature range 0 to +70 c v esd esd susceptibility - human body model (100 pf discharge through 1.5 k ?) (see note 1 ) 2 kv i out output current 1 a v out maximum output voltage (pin 4) with respect to -vcc (pins 1, 2, 3, 18, 19 and 20) and during flyback (see note 2 ) 80 v symbol parameter value unit r thja junction-to-ambient thermal resistance 70 c/w 04812area (cm2) 40 50 60 70 r thja (c/w) copper area 35 m thickness pc board obsolete product(s) - obsolete product(s) obsolete product(s) - obsolete product(s)
5/10 optimwatt tm STV9382 electrical characteristics 5 electrical characteristics t amb = 25 c, v cc = 12 v and f vert = 50 hz unless otherwise specified (refer to figure 1 ) note: 1 input voltage = 0, measured after the filter (e.g. across the 470 nf filter capacitor) 2 supply rejection of the positive or negative power supply. v cc ripple =1 v pp and f =100 hz, measured on the sense resistor. 3 power dissipated in the circuit in the case of the application from figure 1 and the current in the deflection yoke adjusted to 1.5 a pp . the corresponding power dissipated in the vertical deflection yoke is 1.7 w. symbol parameter test conditions min. typ. max. units +v cc positive supply range +10 +18 v -v cc negative supply range -18 -10 v ? v cc maximum recommended difference between +v cc and |-v cc | 4 v v ccstart low v cc detection 6.5 v i q quiescent supply current input voltage = 0 8.5 ma i y maximum vertical yoke current 0.75 a i 13 , i 12 amplifier input bias current -0.1 a v os output offset voltage note 1 -50 +50 mv svr supply voltage rejection note 2 70 db fly thr flyback detection threshold (positive slope) v(14) 1.5 v fly thf flyback detection threshold (negative slope) v(14) 0.5 v p d integrated circuit dissipated power note 3 0.6 w f sw switching frequency c freq = 220 pf 120 155 200 khz f sw-op switching frequency operative range 100 220 khz c freq frequency controller capacitor range pin 10 180 220 240 pf obsolete product(s) - obsolete product(s) obsolete product(s) - obsolete product(s)
i/o waveforms optimwatt tm STV9382 6/10 6 i/o waveforms the following waveforms are obtained with the schematic diagram given in figure 1: test and application circuit diagram : figure 3: current in the deflection yoke (calibration: 0.5 a/div.) figure 4: current and voltage in the deflection yoke during flyback (calibration: 0.5a/div, 10 v/div) obsolete product(s) - obsolete product(s) obsolete product(s) - obsolete product(s)
7/10 optimwatt tm STV9382 i/o waveforms figure 5: current in the deflection yoke and voltage at the error amplifier output (pin 14 - STV9382) during flyback (calibration: 0.5 a/div, 1 v/div) figure 6: current in the deflection yoke and voltage at the output of the STV9382 (pin 4), during the flyback (calibration: 0.5 a/div, 10 v/div) obsolete product(s) - obsolete product(s) obsolete product(s) - obsolete product(s)
package mechanical data optimwatt tm STV9382 8/10 7 package mechanical data figure 7: 20-pin plastic dual in-line package, 300-mil width table 2: dip20 package dim. mm inches min. typ. max. min. typ. max. a 5.33 0.210 a1 0.38 0.015 a2 2.92 3.30 4.95 0.115 0.130 0.195 b 0.36 0.46 0.56 0.014 0.018 0.022 b2 1.14 1.52 1.78 0.045 0.060 0.070 c 0.20 0.25 0.36 0.008 0.010 0.014 d 24.89 26.92 0.980 1.060 e 2.54 0.100 e1 6.10 6.35 7.11 0.240 0.250 0.280 l 2.92 3.30 3.81 0.115 0.130 0.150 number of pins n 20 d e3 sb2 b e a1 a a2 l c e1 e1 g e4 k1 k2 obsolete product(s) - obsolete product(s) obsolete product(s) - obsolete product(s)
9/10 optimwatt tm STV9382 package mechanical data 7.1 change required on application between stv9380/80a/81/83 and STV9382 the stv9380/80a/81/83 and STV9382 are nearly pin to pin compatible except with regards to pins 8,9 and 10. the following application schematic shows the differences: figure 8: esd protection structure obsolete product(s) - obsolete product(s) obsolete product(s) - obsolete product(s)
revision history optimwatt tm STV9382 10/10 8 revision history optimwatt tm is a st deposited trademark for product features allowing optimization of power efficiency at chip/application level information furnished is bel ieved to be accurate and reli able. however, stmicr oelectronics assumes no re sponsibilit y for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result f rom 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 pr eviously supplied. stmicroelectronics products are not authorized for use as critical components in life support devices or systems with out express written approval of stmicroelectronics. the st logo is a registered trademark of stmicroelectronics all other names are the property of their respective owners ? 2004 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - united states www.st.com table 3: summary of modifications version date description 1.0 may 2002 first issue. 1.1 14 october 2002 modification of figure 1: test and application circuit diagram and section 7: package mechanical data . 1.2 23 september 2003 updated chapter 5: electrical characteristics on page 5 . inclusion of chapter 6: i/ o waveforms on page 6 , figure 8: esd protection structure on page 9 and section 7.1: change required on application between stv9380/80a/81/83 and STV9382 on page 9 1.3 october 2003 included optimwatt tm information. added note 1 on page 4 . 1.4 june 2004 removed all references to monitors. removed references to st confidential. obsolete product(s) - obsolete product(s) obsolete product(s) - obsolete product(s)
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