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VIPER22ADIP-E Datasheet(PDF) 1 Page - STMicroelectronics |
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VIPER22ADIP-E Datasheet(HTML) 1 Page - STMicroelectronics |
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February 2006 Rev1 1/20 20 VIPer22ADIP - E VIPer22AS - E Low Power OFF-Line SMPS Primary Switcher Features ■ Fixed 60kHZ Switching Frequency ■ 9V to 38V Wide Range VDD Voltage ■ Current Mode Control ■ Auxiliary Undervoltage Lockout with Hysteresis ■ High Voltage Start-up Current Source ■ Overtemperature, Overcurrent and Overvoltage Protection with Auto-Restart Description The VIPer22A-E combines a dedicated current mode PWM controller with a high voltage Power MOSFET on the same silicon chip. Typical applications cover off line power supplies for battery charger adapters, standby power supplies for TV or monitors, auxiliary supplies for motor control, etc. The internal control circuit offers the following benefits: – Large input voltage range on the VDD pin accommodates changes in auxiliary supply voltage. This feature is well adapted to battery charger adapter configurations. – Automatic burst mode in low load condition. – Overvoltage protection in HICCUP mode. Typical Power Capability Mains type SO-8 DIP-8 European (195 - 265 Vac) 12W 20W US / Wide range (85 - 265 Vac) 7W 12W DIP-8 SO-8 www.st.com Block diagram ON/OFF 0.23 V DRAIN SOURCE VDD PWM LATCH 60kHz OSCILLATOR BLANKING + _ 8/14.5V _ + FF S R1 R4 Q R3 FB REGULATOR INTERNAL SUPPLY OVERVOLTAGE LATCH OVERTEMP. DETECTOR 1 k Ω 42V _ + R2 FF S R Q 230 Ω |
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