GR8875

Preliminary GR8875 Series Green-Mode PWM Controller with High Voltage Startup Circuit Features High-Voltage (700V) Startup Circuit Very Low Startup Current (<30uA) Under-Voltage Lockout (UVLO) HV Discharge Technology to Remove X-cap Discharge Resistors for Good Power Saving 50mW Standby Power Non-Audible-Noise Green-Mode Control 65KHz Switching Frequency with Jittering for Reducing EMI Cycle-by-Cycle Peak Current Limiting Internal Leading-Edge Blanking Internal Slope Compensation Gate Output Maximum Voltage Clamp Internal 6mS Soft Start Soft Driving for Reducing EMI AC Input Brownout Protection with Hysteresis Programmable Over Temperature Latch (OTP) Function Over-Voltage Protection (OVP) on VCC pin Over-Load Protection (OLP) Flexible Latch Shutdown Combination: OVP; OVP+OTP 500mA Driving Capability SOP-8 /SOP-7/DIP-8 Green Package Applications Adaptor/ Open Frame Power Supply LCD Monitor/TV Power Supply Description The GR8875 series is a highly-integrated, low startup current, current mode PWM controller with green-mode function, high-voltage start up circuit, and provides several protections such as OLP, OVP, and OCP for fault conditions. A high-voltage current source supplies the start up current and the traditional start up resistance can be saved in order to reduce the start up power loss. The controller also includes the leading-edge blanking of the current sensing, internal slope compensation and cycle-by-cycle peak current limiting. It is also integrated soft dri...