FSCQ-Series

FSCQ0565RT/FSCQ0765RT/FSCQ0965RT/FSCQ1265RT/ FSCQ1465RT/FSCQ1565RT/FSCQ1565RP

Green Mode Fairchild Power Switch (FPS™)

Features

■ Optimized for Quasi-Resonant Converter (QRC)

■ Advanced Burst-Mode Operation for under 1W Standby Power Consumption

■ Pulse-by-Pulse Current Limit

■ Over Load Protection (OLP) – Auto Restart

■ Over Voltage Protection (OVP) – Auto Restart

■ Abnormal Over Current Protection (AOCP) – Latch

■ Internal Thermal Shutdown (TSD) – Latch

■ Under Voltage Lock Out (UVLO) with Hysteresis

■ Low Startup Current (typical: 25µA)

■ Internal High Voltage SenseFET

■ Built-in Soft Start (20ms)

■ Extended Quasi-Resonant Switching

Applications

■ CTV

■ Audio Amplifier

Related Application Notes

■ AN4146: Design Guidelines for Quasi-Resonant Converters Using FSCQ-Series Fairchild Power Switch.

■ AN4140: Transformer Design Consideration for Off-Line Flyback Converters Using Fairchild Power Switch.

Description

A Quasi-Resonant Converter (QRC) typically shows lower EMI and higher power conversion efficiency compared to conventional hard-switched converter with a fixed switching frequency. Therefore, a QRC is well suited for noise-sensitive applications, such as color TV and audio. Each product in the FSCQ-Series contains an integrated Pulse Width Modulation (PWM) controller and a SenseFET, and is specifically designed for quasiresonant off-line Switch Mode Power Supplies (SMPS) with minimal external components. The PWM controller includes an 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, the FSCQ-Series can reduce total cost, component count, size, and weight, while simultaneously increasing efficiency, productivity, and system reliability. These devices provide a basic platform that is well suited for cost-effective designs of quasi-resonant switching flyback converters.

Ordering Information

Typical Circuit

Pin Configuration

Stock Offer (Hot Sell)

CHONGMING GROUP (HK) INT'L CO., LTD. located in Hong Kong and Shenzhen. We are an independent Distributor of Electronic Components,established in 2008. AS a growing fast company, CM GROUP is renowned for its world-class efficiency, excellent services, and extraordinary ability to supply electronic components that are hard to find and even obsolete. We have taken pride in our innovation, reliability and service, especially in the semiconductor marketplace.
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