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FSL3276ALR: Green Mode Fairchild Buck Switch

Datasheet: FSL3276ALR Green Mode Fairchild Buck Switch
Rev. A (975kB)
Product Overview
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The FSL3276ALR integrate Pulse Width Modulator (PWM) and SenseFET is specifically designed for high-performance offline buck, buck-boost, and non-isolation flyback Switched Mode Power Supplies (SMPS) with minimal external components. This device integrates a high-voltage power regulator that enables operation without auxiliary bias winding. An internal transconductance amplifier reduces external components for the feedback compensation circuit.
The integrated PWM controller includes: 10 V regulator for no external bias circuit, Under-Voltage Lockout (UVLO), Leading-Edge Blanking (LEB), an optimized gate turn-on / turn-off driver, EMI attenuator, Thermal Shutdown (TSD), temperature-compensated precision current sources for loop compensation, and fault-protection circuitry. Protections include: Overload Protection (OLP), Over-Voltage Protection (OVP), Open Feedback Loop Protection (OFLP), and Abnormal Over-Current Protection (AOCP). FSL3276ALR offers good soft-start performance during startup.
The internal high-voltage startup switch and the Burst-Mode operation with very low operating current reduce the power loss in Standby Mode. As the result, it is possible to reach power loss of 120 mW without external bias and 25 mW with external bias when input voltage is 230 VAC.
Features
 
  • Built-in Avalanche Rugged SenseFET: 650 V
  • Fixed Operating Frequency: 50 kHz
  • No-Load Power Consumption: < 25 mW at 230 VAC with External Bias; <120 mW at 230 VAC without External Bias
  • No Need for Auxiliary Bias Winding
  • Frequency Modulation for Attenuating EMI
  • Pulse-by-Pulse Current Limiting
  • Ultra-Low Operating Current: 250 µA
  • Built-in Soft-Start and Startup Circuit
  • Adjustable Peak Current Limit
  • Built-in Transconductance (Error) Amplifier
  • Various Protections: Overload Protection (OLP), Over-Voltage Protection (OVP), Open Feedback Loop Protection (OFLP), AOCP (Abnormal Over-Current Protection), Thermal Shutdown (TSD)
  • Fixed 650 ms Restart Time for Safe Auto-Restart Mode of All Protections
Applications
  • This product is general usage and suitable for many different applications.
Evaluation/Development Tool Information
Product Status Compliance Short Description Action
FEBFSL3276ALR-IO01U25A-GEVB Active
Pb-free
Integrated Controller; 0.25W Auxiliary Power Supply
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
FSL3276ALRN Lifetime
Pb-free
Halide free
FSL3276ALR PDIP-7 626A-01 NA Tube 3000 $0.4217
Market Leadtime (weeks) : Contact Factory
Case Outlines
626A-01   
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