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FSL146MRBN Datasheet, PDF (1/16 Pages) Fairchild Semiconductor – Green-Mode Fairchild Power Switch (FPS™)
April 2012
FSL146MRBN
Green-Mode Fairchild Power Switch (FPS™)
Features
 Advanced Soft Burst-Mode Operation for
Low Standby Power and Low Audible Noise
 Random Frequency Fluctuation (RFF) 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 FSL146MRBN is an integrated Pulse Width
Modulation (PWM) controller and SenseFET 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 FSL146MRBN can reduce total cost, component
count, size, and weight; while simultaneously increasing
efficiency, productivity, and system reliability. This
device provides a basic platform suited for cost-effective
design of a flyback converter.
Applications
 Power Supply for LCD Monitor, STB, and
DVD Combination
Ordering Information
Part Number
Package
Output Power Table(2)
Operating
Junction
Temperature
Current
Limit
RDS(ON)
(Max.)
230VAC ±
Adapter
15%(3)
Open
85-265VAC
Adapter Open
Replaces
Device
(4)
Frame(5)
(4)
Frame(5)
FSL146MRBN
8-DIP
-40°C ~
+125°C
1.50A 2.6 23W 35W 17W
26W
FSFM260
N
Notes:
1. Lead-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 50C ambient temperature.
5. Maximum practical continuous power in an open-frame design at 50C ambient temperature.
© 2012 Fairchild Semiconductor Corporation
FSL146MRBN • Rev. 1.0.0
www.fairchildsemi.com
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