H970

HI-SINCERITY MICROELECTRONICS CORP. Spec. No. : IC200908 Issued Date : 2009.05.27 Revised Date : 2009.12.08 Page No. : 1/14 H970 Switching Power Controller IC General Description H970 is a high performance current mode PWM controller. It’s specifically designed for AC/DC adapter, providing as high as 12W continuous power output in a wide input voltage range from 85V AC to 265V AC. The peak Package Type : DIP-8 Package Code : P Fig.1 output power can reach as high as 18W.The controller can be typically used in fly-back circuit topology, formed a simplicity AC/DC adapter. The distinctively start-up circuit, by using bootstrap circuit and the amplified of power transistors, significantly decreases the power dissipation of the start-up resistor. The oscillator frequency will automatically be lower while the output power is smaller. And this will extremely decrease the IC’s standby power dissipation. At the off-state of power transistor, the reverse bias of Emit of power tran...