FSDH0170RNB Datasheet, PDF (1/19 Pages) Fairchild Semiconductor – Green Mode Fairchild Power Switch (FPSTM)

March 2006
FSDH0170RNB/FSDH0270RNB/FSDH0370RNB
Green Mode Fairchild Power Switch (FPS™)
Features
„ Internal Avalanche Rugged 700V Sense FET
„ Consumes only 0.8W at 230 VAC & 0.5W load with
Burst-Mode Operation
„ Frequency Modulation for EMI Reduction
„ 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), Over Load 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
„ SMPS for Printer, Facsimile & Scanner
„ Adapter for Camcorder
Related Application Notes
„ AN-4137, AN-4141, AN-4147 (Flyback)
„ AN-4134 (Forward)
Description
The FSDH0170RNB/FSDH0270RNB/FSDH0370RNB
consists of an integrated current mode Pulse Width Mod-
ulator (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 oscillator with frequency mod-
ulation for reduced EMI, Under Voltage Lock Out (UVLO)
protection, Leading Edge Blanking (LEB), an optimized
gate turn-on/ turn-off driver, Thermal Shut Down (TSD)
protection, and temperature compensated precision cur-
rent sources for loop compensation and fault protection
circuitry. Compared to a discrete MOSFET and controller
or RCC switching converter solution, the FSDH0170RNB/
FSDH0270RNB/FSDH0370RNB reduces total compo-
nent 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
Product Number
FSDH0170RNB
FSDH0270RNB
FSDH0370RNB
Package
8DIP
8DIP
8DIP
Marking Code
DH0170R
DH0270R
DH0370R
BV_DSS
700V
700V
700V
f_OSC
100KHz
100KHz
100KHz
R_{DS(ON) (MAX.)}
11Ω
7.2Ω
4.75Ω
©2006 Fairchild Semiconductor Corporation
1
FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Rev. 1.0.2
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