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FSL176MRT
Green-Mode Fairchild Power Switch (FPS™)
Features
Description
Advanced Soft Burst-Mode Operation for
The FSL176MRT is an integrated Pulse Width
Modulation (PWM) controller and SenseFET specifically
designed for offline Switched-Mode Power Supplies
(SMPS) with minimal external components. The PWM
controller includes an integrated fixed-frequency
oscillator, Under-Voltage Lockout (UVLO), LeadingEdge 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 FSL176MRT 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.
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
Applications
Power Supply for LCD Monitor, STB, and
DVD Combination
Ordering Information
(2)
Output Power Table
Part Number
Package
Operating
Current RDS(ON)
Junction
Limit (Max.)
Temperature
TO-220
6-Lead(1)
FSL176MRTUDTU
UForming
-40°C ~
+125°C
3.50A
1.6Ω
230VAC ±15%(3)
Adapter(4)
80W
85~265VAC
Open
Open
(4)
(5) Adapter
(5)
Frame
Frame
90W
48W
70W
Replaces
Device
FSGM0765R
Notes:
1. Pb-free package per JEDEC J-STD-020B.
2. The junction temperature can limit the maximum output power.
3. 230VAC or 100/115VAC with voltage doubler.
4. Typical continuous power in a non-ventilated enclosed adapter measured at 50C ambient temperature.
5. Maximum practical continuous power in an open-frame design at 50C ambient temperature.
© 2012 Fairchild Semiconductor Corporation
FSL176MRT • Rev. 1.0.0
www.fairchildsemi.com
FSL176MRT — Green-Mode Fairchild Power Switch (FPS™)
August 2012
FSL176MRT — Green-Mode Fairchild Power Switch (FPS™)
Application Circuit
VO
AC
IN
VSTR
Drain
GND
FB
VCC
Figure 1.
Typical Application Circuit
Internal Block Diagram
VSTR
VCC
Drain
6
3
1
ICH
VBURST
0.30V / 0.45V
Vref
Soft Burst
VCC Good
7.5V / 12V
Random
VCC
Vref
2.0µA
IDELAY
FB
OSC
90µA
IFB
Soft-Start
PWM
4
S
Q
R
Q
Gate
Driver
3R
R
N.C.
LEB (300ns)
5
tON