Fairchild FSL146MRBN Data Handbook
Summary
The FSL146MRBN is an advanced integrated PWM controller and SenseFET optimized for high-efficiency, low-noise offline Switch-Mode Power Supplies (SMPS). Featuring Green Mode technology, it offers soft burst operation, minimal components, and built-in protections (OVP/OCP) ideal for cost-effective power adapter design. This technical manual provides detailed application circuits, absolute maximum ratings, pin definitions, efficiency data, and dimensional specs. It is essential documentation for electrical engineers designing compact, reliable power supply solutions for consumer electronics like LCD monitors and STBs.
Page 1 Text Content
146M reen -M e F airch ild er S itch (F
April 2012
FSL146MRBN Green-Mode Fairchild Power Switch (FPS™)
Features
Description
Advanced Soft Burst-Mode Operation for
The FSL146MRBN is an integrated Pulse Width
Low Standby Power and Low Audible Noise
Modulation (PWM) controller and Sense FET designed Random Frequency Fluctuation (RFF) for Low EMI for offline Switch-Mode Power Supplies (SMPS) with minimal external components. The PWM controller
Pulse-by-Pulse Current Limit
includes an integrated fixed-frequency oscillator, Under- Various Protection Functions: Overload Protection Voltage Lockout (UVLO), Leading-Edge Blanking (LEB), (OLP), Over-Voltage Protection (OVP), Abnormal optimized gate driver, internal soft-start, temperature- Over-Current Protection (AOCP), Internal Thermal compensated precise current sources for loop Shutdown (TSD) with Hysteresis, Output-Short compensation, and self-protection circuitry. Compared Protection (OSP), and Under-Voltage Lockout with a discrete MOSFET and PWM controller solution, (UVLO) with Hysteresis the FSL146MRBN can reduce total cost, component count, size, and weight; while simultaneously increasing
Low Operating Current (0.4m A) in Burst Mode
efficiency, productivity, and system reliability. This Internal Startup Circuit device provides a basic platform suited for cost-effective design of a flyback converter.
Internal High-Voltage Sense FET: 650V Built-in Soft-Start: 15ms Auto-Restart Mode
Applications Power Supply for LCD Monitor, STB, and DVD Combination
Ordering Information
Output Power Table(2)
Operating
Current RDS(ON) 230VAC ± 15%(3) 85-265VAC Replaces
Part Number Package Junction
Limit (Max.) Device
Temperature Adapter Open Adapter Open
Frame(5) Frame(5)
-40°C ~ FSFM260
FSL146MRBN 8-DIP 1.50A 2.6 23W 35W 17W 26W
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 50C ambient temperature. 5. Maximum practical continuous power in an open-frame design at 50C ambient temperature.
© 2012 Fairchild Semiconductor Corporation www.fairchildsemi.com FSL146MRBN • Rev. 1.0.0
Page Summary Contents For Fairchild FSL146MRBN Data Handbook
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 16 |
| File Size | 828.29 KB |
| Published | July 22, 2026 |
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