Description

The highly integrated FSL137H consists of an integrated current mode Pulse Width Modulator (PWM) and an avalanche-rugged 700V SenseFET. It is specifically designed for high-performance offline Switch Mode Power Supplies (SMPS) with minimal external components.

Features

ƒ Built-in 5ms Soft-Start Function

ƒ Internal Avalanche Rugged 700V SenseFET

ƒ Low Audio Noise

ƒ High-Voltage Startup

ƒ Fixed PWM Frequency at 100KHz

ƒ Linearly Decreasing PWM Frequency to 18KHz

ƒ Peak-Current-Mode Control

ƒ Cycle-by-Cycle Current Limiting

ƒ Leading-Edge Blanking (LEB)

ƒ Synchronized Slope Compensation

ƒ Internal Open-loop Protection (OLP)

ƒ VDD Under-Voltage Lockout (UVLO)

ƒ VDD Over-Voltage Protection (OVP)

ƒ Constant Power Limit (Full AC Input Range)

ƒ Internal OTP Sensor with Hysteresis

Applications

General-purpose switch-mode power supplies and flyback power converters, including:

ƒ SMPS for VCR, SVR, STB, DVD & VCD Player,Printer, Facsimile, & Scanner

ƒ Adapter for Camcorder