VIPER20B - STMicroelectronics

VIPER20B SMPS PRIMARY I.C.

VIPer20B™ combines on the same silicon chip a state-of-the-art PWM circuit together with an optimized high voltage avalanche rugged Vertical Power MOSFET (400V 1.3A). Typical applications cover off line power supplies with a secondary max power capability of 30W. It is compatible from both primary or secondary regulation loop despite using around 50% less co.

Features

a discrete solution. Burst mode operation is an additional feature of this device, offering the possibility to operate in stand-by mode without extra components. OSC DRAIN ON/OFF OSCILLATOR SECURITY LATCH VDD UVLO LOGIC R/S FF S Q PWM LATCH R1 S FF R2 R3 Q OVERTEMP. DETECTOR 0.5 V + _ 2 µs delay 300 ns Blanking + _ + 0.5V _ 6 V/A _ 13 V + ERROR AMPLIFIER CURRENT AMPLIFIER 4.5 V COMP SOURCE FC00490 September 1999 1/17 VIPer20B / VIPer20BSP ABSOLUTE MAXIMUM RATING Symb ol V DS ID VDD V OSC V COMP I COMP V esd I D(AR) P tot Tj T s tg Parameter o Continuous Drain-Source Vol.