STV9390 Datasheet | STMicroelectronics

CLASS-D VERTICAL DEFLECTION AMPLIFIER FOR TV AND MONITOR APPLICATION Features s s s s s s s s HIGH EFFICIENCY POWER AMPLIFIER NO HEATSINK SPLIT SUPPLY INTERNAL FLYBACK GENERATOR OUTPUT CURRENT UP TO 2.2 APP SUITABLE FOR DC COUPLING APPLICATION FEW EXTERNAL PONENTS PROTECTION AGAINST LOW Vcc DESCRIPTION Designed for monitors and TVs, the STV9390 is a class-D vertical deflection booster assembled in SO20 Package. It operates with supplies up to +/- 18V, provides up to 2.2 App output current to drive the yoke. The internal flyback generator avoids the need for an extra power supply. m o .c U 4 t e e h S a t a .D w w w SO20 ORDER CODE: STV9390 PIN CONNECTION +VCC 1 2 3 4 5 6 7 8 9 20 19 18 17 16 15 14 13 12 EAOUT IN+ IN- +VCC POW -VCC POW SGND -VCC -VCC NC -VCC -VCC FREQ FEEDCAP VREG BOOT CFLY+ CFLY- September 2003 m o .c U 4 t e e h S a at .D 1 w w w Version 2.0 1/7 PIN FUNCTIONS Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Name +VCC +VCCPOW -VCCPOW NC -VCC -VCC NC OUT CFLY+ CFLYBOOT VREG FEEDCAP FREQ -VCC -VCC SGND ININ+ EAOUT Positive supply Positive power supply Negative power supply Not connected Negative supply Negative supply Not connected PWM output Flyback capacitor Flyback capacitor Bootstrap capacitor Internal voltage regulator Feed-back integrating capacitor Frequency setting resistor Negative supply Negative supply Signal ground Error amplifier inverting input Error amplifier non-inverting input Error amplifier output Function FUNCTIONAL DESCRIPTION The STV9390 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...