STV9381 Datasheet | STMicroelectronics

CLASS-D VERTICAL DEFLECTION AMPLIFIER FOR TV AND MONITOR APPLICATION Features s HIGH .. s s s s s s s EFFICIENCY POWER AMPLIFIER NO HEATSINK SPLIT SUPPLY INTERNAL FLYBACK GENERATOR OUTPUT CURRENT UP TO 3 APP SUITABLE FOR DC COUPLING APPLICATION FEW EXTERNAL PONENTS PROTECTION AGAINST LOW Vcc PDIP20 (14+3+3) ORDER CODE: STV9381 DESCRIPTION Designed for monitors and TVs, the STV9381 is a class-D vertical deflection booster assembled in PDIP20 Package. It operates with supplies up to +/- 18V, provides up to 3 App output current to drive the yoke. The internal flyback generator avoids the need for an extra power supply. PIN CONNECTION -VCC -VCC -VCC OUT CFLY + CFLY BOOT VREG FEEDCAP FREQ 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 -VCC -VCC -VCC -VCCPOW + VCC POW +VCC EAout IN+ INSGND Version 3.0 September 2003 1/8 PIN FUNCTIONS Pin Number 1 2 3 4 5 Name -VCC -VCC -VCC OUT CFLY+ CFLYBOOT VREG FEEDCAP FREQ SGND ININ+ EA out +VCC +VCCPOW -Vcc POW -VCC -VCC -VCC Negative supply Negative supply Negative supply PWM Output Flyback capacitor Flyback capacitor Bootstrap capacitor Internal voltage regulator Feed-back integrating capacitor Frequency setting resistor Signal Ground Error amplifier inverting input Error amplifier non-inverting input Error amplifier output Positive supply Positive Power supply Negative Power supply Negative supply Negative supply Negative supply Function .. 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 FUNCTIONAL DESCRIPTION The STV9381 is a vertical deflection circuit operating in class D. The 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 low power dissipation paratively to traditional amplifiers operating in class AB, eliminating the need of an heatsink. Except for the output stage...