FAN6861

FAN6861 — Low-Cost, Highly Integrated, Green-Mode PWM Controller for Peak Power Management May 2009 FAN6861 Low-Cost, Highly Integrated, Green-Mode PWM Controller for Peak Power Management Features ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ Low Startup Current: 15µA Maximum Green-Mode and Burst-Mode Operation for Low Standby Power Consumption Internal Soft Start: 10ms Frequency Hopping for EMI Reduction Peak-Current Mode Control with Cycle-by-Cycle Current Limiting Constant Output Power Limit (Full AC Input Range) Built-in Slope Compensation Two-Level Over-Current Protection (OCP) with Delayed Shutdown (780ms) for Peak Power Management Open-Loop / Over-Load Protection (OLP) VDD Over-Voltage Protection (OVP) Programmable Over-Temperature Protection (OTP) Description Highly integrated PWM controller, FAN6861 is optimized for applications with motor load; such as printer and scanner, which inherently impose some kind of overload condition on the power supply during acceleration mode. The two-level OCP function allows the SMPS to stably deliver peak power during the motor acceleration mode without causing premature shutdown and while protecting the SMPS from overload condition. The green-mode and burst-mode functions with a low operating current (2.2mA maximum in green mode) maximize the light load efficiency so that the power supply can meet most stringent standby power regulations. The frequency-hopping function helps reduce electromagnetic interference (EMI) of a power supply by spreading the e...