FSD176MRT Datasheet, PDF (1/17 Pages) Fairchild Semiconductor – Green-Mode Fairchild Power Switch (FPS™)

September 2011
FSD176MRT
Green-Mode Fairchild Power Switch (FPS™)
Features
 Advanced Soft Burst-Mode Operation for
Low Standby Power and Low Audible Noise
 Random Frequency Fluctuation for Low EMI
 Pulse-by-Pulse Current Limit
 Various Protection Functions: Overload Protection
(OLP), Over-Voltage Protection (OVP), Abnormal
Over-Current Protection (AOCP), Internal Thermal
Shutdown (TSD) with Hysteresis, Output-Short
Protection (OSP), and Under-Voltage Lockout (UVLO)
with Hysteresis
 Low Operating Current (0.4mA) in Burst Mode
 Internal Startup Circuit
 Internal High-Voltage SenseFET: 650V
 Built-in Soft-Start: 15ms
 Auto-Restart Mode
Description
The FSD176MRT is an integrated Pulse Width
Modulation (PWM) controller and SenseFET specifically
designed for offline 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 a discrete MOSFET and PWM
controller solution, the FSD176MRT can reduce total
cost, component count, size, and weight; while
simultaneously increasing efficiency, productivity, and
system reliability. This device provides a basic platform
for cost-effective design of a flyback converter.
Applications
 Power Supply for LCD Monitor, STB, and
DVD Combination
Ordering Information
Part Number
Output Power Table⁽²⁾
Package
Operating
Junction
Temperature
Current
Limit
R_DS(ON)
(Max.)
230V_AC ±15%⁽³⁾
Adapter⁽⁴⁾
Open
Frame⁽⁵⁾
85~265V_AC
Adapter⁽⁴⁾
Open
Frame⁽⁵⁾
Replaces
Device
TO-220
FSD176MRTUDTU 6-Lead⁽¹⁾
U-Forming
-40°C ~
+125°C
3.50A 1.6Ω
80W
90W
48W
70W FSGM0765R
TO-220
FSD176MRTLDTU 6-Lead⁽¹⁾
L-Forming
-40°C ~
+125°C
3.50A 1.6Ω
80W
90W
48W
70W FSGM0765R
Notes:
1. Pb-free package per JEDEC J-STD-020B.
2. The junction temperature can limit the maximum output power.
3. 230V_AC or 100/115V_AC with voltage doubler.
4. Typical continuous power in a non-ventilated enclosed adapter measured at 50C ambient temperature.
5. Maximum practical continuous power in an open-frame design at 50C ambient temperature.
© 2011 Fairchild Semiconductor Corporation
FSD176MRT • Rev. 1.0.0
www.fairchildsemi.com