VIPER50B - STMicroelectronics

VIPER50B SMPS PRIMARY I.C.

VIPer50B made using VIPower M0 Technology combines on the same silicon chip a state-of-the-art PWM circuit together with an optimized high voltage avalanche rugged Vertical Power MOSFET (400 V / 3 A). Typical applications cover off line power supplies with a secondary power capability of 50W in a US mains lines configuration. It is compatible from both prima.

Features

ondary regulation loop despite using around 50% less components when compared with 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. DRAIN ON/OFF OSCILLATOR SECURITY LATCH VDD PWM LATCH S R1 FF Q R2 R3 UVLO LOGIC R/S FF S Q OVERTEMP. DETECTOR 0.5V _ + + _ 0.5 V ERROR _ AMPLIFIER 13 V + + _ 1.7 µ s DELAY 250 ns BLANKING 1 V/A CURRENT AMPLIFIER COMP SOURCE FC00291B 4.5 V December 1999 1/20 VIPER50B/BSP ABSOLUTE MAXIMUM RATING Symb ol V DS ID VDD V OSC V COMP I COMP.