FSDM0565R Green Mode Fairchild Power Switch (FPS^TM)

Features

• Internal Avalanche Rugged Sense FET

• Advanced Burst-Mode operation consumes under 1 W at 240VAC & 0.5W load

• Precision Fixed Operating Frequency (66kHz)

• Internal Start-up Circuit

• Pulse by Pulse Current Limiting

• Abnormal Over Current Protection (AOCP)

• Over Voltage Protection (OVP)

• Over Load Protection (OLP)

• Internal Thermal Shutdown Function (TSD)

• Auto-Restart Mode

• Under Voltage Lock Out (UVLO) with hysteresis

• Low Operating Current (2.5mA)

• Built-in Soft Start

Application

• SMPS for LCD monitor and STB

• Adaptor

Description

The FSDM0565R is an integrated Pulse Width Modulator (PWM) and Sense FET specifically designed for high performance offline Switch Mode Power Supplies (SMPS) with minimal external components. This device is an integrated high voltage power switching regulator which combine an avalanche rugged Sense FET with a current mode PWM control block.

The PWM controller includes integrated fixed frequency oscillator, under voltage lockout, leading edge blanking (LEB), optimized gate driver, internal soft start, temperature compensated precise current sources for a loop compensation and self protection circuitry. Compared with discrete MOSFET and PWM controller solution, it can reduce total cost, component count, size and weight simultaneously increasing efficiency, productivity, and system reliability. This device is a basic platform well suited for cost effective designs of flyback converters.

Absolute Maximum Ratings

(Ta=25°C, unless otherwise specified)

Notes:

1. Repetitive rating: Pulse width limited by maximum junction temperature

2. L=14mH, starting Tj=25°C

3. L=13uH, starting Tj=25°C

Typical Circuit

Internal Block Diagram

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