FS6X1220R

FS6X0420RJ/ FS6X0720RJ/ FS6X1220RJ Fairchild Power Switch (FPSTM)

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FS6X0420RJ/ FS6X0720RJ/ FS6X1220RJ Fairchild Power Switch (FPSTM)

March 2006

FS6X0420RJ/ FS6X0720RJ/ FS6X1220RJ Fairchild Power Switch (FPSTM)
Features
Current Mode PWM Control with a Fixed Operating Frequency (300kHz) Pulse by Pulse Current Limit Over Load Protection Over Voltage Protection Thermal Shutdown Line Under Voltage Detection and Sleep on/off Function Internal High Voltage SenseFET (200V) Supports Forward or Flyback Topology

Description
The FS6X-Series is specially designed for off-line DC-DC converters with minimal external components. This device combines a current mode PWM controller with a high voltage power SenseFET in a single package. The PWM controller includes integrated fixed frequency oscillator, line under voltage lockout, sleep on/off function, thermal shutdown protection, over voltage protection, pulse-by-pulse current limit, and temperature compensated precise current sources for a loop compensation. Compared with the discrete MOSFET and PWM controller solution, the FS6X-Series can reduce total cost, component count, size, and weight, while simultaneously increasing efficiency, productivity, and system reliability.

Applications
DC-DC Converter PoE Device

OUTPUT POWER TABLE(1)
PRODUCT FS6X0420RJ FS6X0720RJ FS6X1220RJ 36VDC 72VDC 14W 26W 36W

Related Application Notes
AN4137 - Design Guidelines for Off-line Flyback Converters Using Fairchild Power Switch (FPS) AN4140 - Transformer Design Consideration for Off-line Flyback Converters using Fairchild Power Switch AN4141 - Troubleshooting and Design Tips for Fairchild Power Switch Flyback Applications AN4148 - Audible Noise Reduction Techniques for FPS Applications

Table 1. Maximum Output Power
Note: 1. Maximum practical continuous power in an open frame design at 50 C ambient.

Ordering Information
Part Number
FS6X0420RJ FS6X0720RJ FS6X1220RJ FS6X0420RJX FS6X0720RJX FS6X1220RJX
(2)

Operating Temp. Range
-25 C to 85 C -25 C to 85 C -25 C to 85 C -25 C to 85 C -25 C to 85 C -25 C to 85 C

Pb-Free
Yes Yes Yes Yes Yes Yes

Package
D2-Pak-6L D2-Pak-6L D2-Pak-6L D2-Pak-6L D2-Pak-6L D2-Pak-6L

Packing Method
Tube Tube Tube Tape Reel Tape Reel Tape Reel

Marking Code
6X0420R 6X0720R 6X1220R 6X0420R 6X0720R 6X1220R

Note: 2. X : Tape Reel
FPSTM is a trademark of Fairchild Semiconductor Corporation
2006 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FS6X0420RJ/ FS6X0720RJ/ FS6X1220RJ Rev. 1.0.1