August 2006

© 2006 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FSCQ510, FSCQ510H Rev. 0.0.3

PRELIMINARY DATASHEET

FSQ510, FSQ510H — Green Mode Fairchild Power

Switch (FPS

– Low EMI and High Efficiency

Features

Uses a DMOS Integrated Power Switch

Optimized for Quasi-Resonant Converter (QRC)

Low EMI through Variable Frequency Control and

Inherent Frequency Modulation

High Efficiency through Minimum Voltage Switching

Extended Quasi-Resonant Switching for Wide Load

Ranges

Small Frequency Variation for Wide Load Ranges

Advanced Burst-Mode Operation for Low Standby

Power Consumption

Pulse-by-Pulse Current Limit

Various Protection Functions: Overload Protection

(OLP), Abnormal Over-Current Protection (AOCP),

Internal Thermal Shutdown (TSD) with Hysteresis

Under-Voltage Lockout (UVLO) with Hysteresis

Internal Start-up Circuit

Internal High-Voltage SenseFET (700V)

Built-in Soft Start (5ms)

Applications

Cell Phone Chargers

Auxiliary Power Supplies for PC and White Goods

Description

A Quasi-Resonant Converter (QRC) generally shows

lower EMI and higher power conversion efficiency than a

conventional hard-switched converter with a fixed

switching frequency. The FSQ510(H) is an integrated

Pulse-Width

Modulation

(PWM)

controller

and

SenseFET specifically designed for quasi-resonant off-

line Switch Mode Power Supplies (SMPS) with minimal

external components. The PWM controller includes an

integrated fixed-frequency oscillator, Under-Voltage

Lockout (UVLO), Leading Edge Blanking (LEB),

optimized gate driver, internal soft start, temperature-

compensated

precise

current

sources

for

loop

compensation, and self-protection circuitry. Compared

with discrete MOSFET and PWM controller solution, the

FSQ510(H) can reduce total cost, component count,

size and weight; while simultaneously increasing

efficiency, productivity, and system reliability. This

device provides a basic platform that is well suited for

cost-effective designs of quasi-resonant switching

flyback converters.

Ordering Information

Maximum Output Power

(1)

230VAC ± 15%

(2)

85-265VAC

Part

Number

Package

Pb-

Free

Operating

Temperature

Range

Current

Limit

(MAX)

Adapter

(3)

Open

Frame

(4)

Adapter

(3)

Open

Frame

(4)

Replaces

Devices

FSQ510

7-DIP

Yes -25℃ to +85℃ 320mA

32

Ω

5W

7W

4W

5W

FSD210B

FSQ510H 8-DIPH

Yes -25℃ to +85℃ 320mA

32

Ω

5W

7W

4W

5W

FSD210HD

Notes:

1.

The junction temperature can limit the maximum output power.

2.

230VAC or 100/115VAC with doubler.

3.

Typical continuous power in a non-ventilated enclosed adapter measured at 50

°C ambient.

4.

Maximum practical continuous power in an open-frame design at 50

°C ambient temperature.