650V Integrated Power Switch with 100kHz frequency and adjustable current limit for 10W offline flyback converters

The FSL106HR integrates a Pulse Width Modulator (PWM) and SenseFET is specifically designed for highperformance offline Switch-Mode Power Supplies (SMPS) with minimal external components. FSL106HR includes integrated high-voltage power switching regulators that combine an avalanche-rugged SenseFET with a current-mode PWM control block.     The integrated PWM controller includes: Under-Voltage Lockout (UVLO) protection, Leading-Edge Blanking (LEB), a frequency generator for EMI attenuation, an optimized gate turn-on/turn-off driver, Thermal Shutdown (TSD) protection, and temperaturecompensated precision current sources for loop compensation and fault protection circuitry. The FSL106HR offers good soft-start performance. When compared to a discrete MOSFET and controller or RCC switching converter solution, the FSL106HR reduces total component count, design size, and weight; while increasing efficiency, productivity, and system reliability. This device provides a basic platform that is well suited for the design of cost-effective flyback converters.


  • Internal Avalanche-Rugged SenseFET (650V)
  • Under 50mW Standby Power Consumption at265VAC, No-load Condition with Burst Mode
  • Precision Fixed Operating Frequency withFrequency Modulation for Attenuating EMI
  • Internal Startup Circuit
  • Built-in Soft-Start: 15ms
  • Pulse-by-Pulse Current Limiting
  • Various Protections: Over-Voltage Protection(OVP), Overload Protection (OLP), Output-ShortProtection (OSP), Abnormal Over-CurrentProtection (AOCP), Internal Thermal ShutdownFunction with Hysteresis (TSD)
  • Auto-Restart Mode
  • Under-Voltage Lockout (UVLO)
  • Low Operating Current: 1.8mA
  • Adjustable Peak Current Limit
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Product Product &
Eco Status
Unit Price/
1K Order
Packing Method Convention Package Marking
FSL106HR Full Production
Green as of Oct 2015

MDIP 8L  -  Details

PDF MDIP 8L  Drawing
Last Update: Oct 2015 PDF MDIP-8L, PACKING DRAWING
Last Update: May 2013 PDF DIP 8TUBE
Last Update: Oct 2015
Line 1$Y (Fairchild logo)
&E (Space)
&Z (Plant Code)
&2 (2-Digit Date Code)

Line 2FSL106HR

ESD (CDM) 2000V

ESD (HBM) 5000V


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Application Note Description
AN-4138 PDFDesign Considerations for Battery Charger Using Green Mode Fairchild Power Switch (FPS™)
Last Update : 28-Jun-2014
AN-4137 PDFDesign Guidelines for Offline Flyback Converters using FPS™
Last Update : 03-Apr-2015
AN-4140 PDFTransformer Design Consideration for Offline Flyback Converters Using Fairchild Power Switch (FPS™)
Last Update : 28-Jun-2014
AN-4141 PDFTroubleshooting and Design Tips for Fairchild Power Switch (FPS™) Flyback Applications
Last Update : 28-Jun-2014
AN-4148 PDFAudible Noise Reduction Techniques for FPS™ Applications
Last Update : 10-Oct-2013

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