VIPER22AS-E STMicroelectronics

VIPer22A-E VIPer22ADIP-E, VIPer22AS-E Low power OFF-line SMPS primary switcher Features Fixed 60 kHz switching frequency 9 V to 38 V wide range V voltage DD Current mode control SO-8 DIP-8 Auxiliary undervoltage lockout with hysteresis Typical applications cover off line power supplies High voltage start-up current source for battery charger adapters, standby power Overtemperature, overcurrent and overvoltage supplies for TV or monitors, auxiliary supplies for protection with auto-restart motor control, etc. The internal control circuit offers the following benefits: Table 1. Typical power capability Large input voltage range on the V pin DD Mains type SO-8 DIP-8 accommodates changes in auxiliary supply voltage. This feature is well adapted to battery European (195 - 265 Vac) 12 W 20 W charger adapter configurations. US / wide range (85 - 265 Vac) 7 W 12 W Automatic burst mode in low load condition. Description Overvoltage protection in HICCUP mode. The VIPer22A-E combines a dedicated current mode PWM controller with a high voltage power MOSFET on the same silicon chip. Figure 1. Block diagram DRAIN ON/OFF 60kHz OSCILLATOR REGULATOR PWM INTERNAL S LATCH SUPPLY OVERTEMP. FF R1 Q DETECTOR R2 R3 R4 VDD + BLANKING 0.23 V 8/14.5V + OVERVOLTAGE LATCH 230 R + FF S Q 42V 1 k FB SOURCE November 2010 Doc ID 12050 Rev 2 1/21 www.st.com 21Contents VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Contents 1 Electrical data 3 1.1 Maximum ratings 3 1.2 Thermal data . 3 2 Electrical characteristics . 4 3 Pin connections and function . 6 4 Operations . 7 4.1 Rectangular U-I output characteristics 7 4.2 Wide range of VDD voltage 8 4.3 Feedback pin principle of operation 8 4.4 Startup sequence . 11 4.5 Overvoltage threshold . 12 5 Operation pictures . 13 6 Package mechanical data 16 7 Order codes . 19 8 Revision history . 20 2/21 Doc ID 12050 Rev 2