FSQ0170RNA datasheet(2/18 Pages) ONSEMI

2 / 18 page

www.fairchildsemi.com

October 2011

FSQ0170RNA, FSQ0270RNA Rev. 1.0.5

FPSTM is a trademark of Fairchild Semiconductor Corporation.

FSQ0170RNA, FSQ0270RNA

Green Mode Fairchild Power Switch (FPS™)

Features

 Internal Avalanche Rugged 700V SenseFET

 Consumes only 0.8W at 230 VAC & 0.5W Load with

Burst-Mode Operation

 Precision Fixed Operating Frequency, 100kHz

 Internal Start-up Circuit and Built-in Soft-Start

 Pulse-by-Pulse Current Limiting and Auto-Restart

Mode

 Over-Voltage Protection (OVP), Overload Protection

(OLP), Internal Thermal Shutdown Function (TSD)

 Under-Voltage Lockout (UVLO)

 Low Operating Current (3mA)

 Adjustable Peak Current Limit

Applications

 Auxiliary Power Supply for PC and Server

 SMPS for VCR, SVR, STB, DVD & DVCD Player,

Printer, Facsimile & Scanner

 Adapter for Camcorder

Related Application Notes

 AN-4134: Design Guidelines for Off-line Forward

Converters Using Fairchild Power Switch (FPS™)

 AN-4137: Design Guidelines for Off-line Flyback

Converters Using Fairchild Power Switch (FPS™)

 AN-4141: Troubleshooting and Design Tips for

Fairchild Power Switch (FPS™) Flyback Applications

 AN-4147: Design Guidelines for RCD Snubber of

Flyback

 AN-4148: Audible Noise Reduction Techniques for

FPS™ Applications

Description

The FSQ0170RNA, and FSQ0270RNA, consists of an

integrated current mode Pulse Width Modulator (PWM)

and an avalanche-rugged 700V Sense FET. It is

specifically

designed

for

high-performance

off-line

Switch Mode Power Supplies (SMPS) with minimal

external components. The integrated PWM controller

features include: a fixed-frequency generating oscillator,

Under-Voltage Lockout (UVLO) protection, Leading

Edge Blanking (LEB), an optimized gate turn-on / turn-off

driver,

Thermal

Shutdown

(TSD)

protection,

and

temperature compensated precision current sources for

loop compensation and fault protection circuitry.

Compared to a discrete MOSFET and controller or RCC

switching converter solution, the FSQ0170RNA, and

FSQ0270RNA reduces total component count, design

size, and weight while increasing efficiency, productivity,

and system reliability. These devices provide a basic

platform that is well suited for the design of cost-effective

flyback converters, as in PC auxiliary power supplies.

Ordering Information

8-DIP

Product Number

Package

Marking Code

BVDSS

fOSC

RDS(ON) (MAX.)

FSQ0170RNA

8DIP

Q0170RA

700V

100kHz



FSQ0270RNA

8DIP

Q0270RA

700V

100kHz

7.2



FSQ0170RNA Datasheet(PDF) 2 Page - ON Semiconductor

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