FSCM0765R

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FSCM0765R
Features

Green Mode Fairchild Power Switch (FPSTM)
Internal Avalanche Rugged SenseFET Low Start-up Current (max 40uA) Low Power Consumption under 1 W at 240VAC and 0.4W Load Precise Fixed Operating Frequency (66kHz) Frequency Modulation for low EMI Pulse by Pulse Current Limiting (Adjustable) Over Voltage Protection (OVP) Over Load Protection (OLP) Thermal Shutdown Function (TSD) Auto-Restart Mode Under Voltage Lock Out (UVLO) with Hysteresis Built-in Soft Start (15ms) OUTPUT POWER TABLE
230VAC 15%(3) PRODUCT FSCM0565RJ FSCM0765RJ FSCM0565RI FSCM0765RI FSCM0565RG FSCM0765RG Adapter(1) 50W 65W 50W 65W 70W 85W Open Frame(2) 65W 70W 65W 70W 85W 95W 85-265VAC Adapter(1) 40W 50W 40W 50W 60W 70W Open Frame(2) 50W 60W 50W 60W 70W 85W

Table 1. Maximum Output Power
Notes: 1. Typical continuous power in a non-ventilated enclosed adapter measured at 50 C ambient. 2. Maximum practical continuous power in an open-frame design at 50 C ambient. 3. 230 VAC or 100/115 VAC with doubler.

Application
SMPS for VCR, SVR, STB, DVD and DVCD Adaptor SMPS for LCD Monitor

Related Application Notes
AN-4137: Design Guidelines for Off-line Flyback Converters Using Fairchild Power Switch (FPS) AN-4140: Transformer Design Consideration for off-line Flyback Converters using Fairchild Power Switch AN-4141: Troubleshooting and Design Tips for Fairchild Power Switch Flyback Applications AN-4148: Audible Noise Reduction Techniques for FPS Applications

Typical Circuit

DC OUT AC IN

Description
The FSCM0765R is an integrated Pulse Width Modulator (PWM) and SenseFET 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 combines an avalanche rugged SenseFET 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 a discrete MOSFET and PWM controller solution, it can reduce total cost, component count, size, and weight while simultaneously increasing efficiency, productivity, and system reliability. This device is a basic platform well suited for cost effective designs of flyback converters.
PWM
Ilimit Vfb Vcc

Drain

GND

Figure 1. Typical Flyback Application

Rev.1.1.0
2005 Fairchild Semiconductor Corporation