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Home » NEWEST Products » New by Manufacturer » Fairchild Semiconductor » FAN501/FAN501A Offline PWM Controllers - Fairchild
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Fairchild FAN501/FAN501A Offline DCM/CCM Flyback PWM Contollers

Fairchild FAN501/FAN501A Offline DCM/CCM Flyback
PWM Controllers

Fairchild FAN501/FAN501A Offline DCM/CCM Flyback PWM Controllers are an advanced PWM controller that simplifies isolated power supply design that requires CC regulation of the output. The output current is precisely estimated with only the information in the primary side of the transformer and controlled with an internal compensation circuit, removing the output current-sensing loss and eliminating external CC control circuitry. With an extremely low operating current (250µA), Burst Mode maximizes light-load efficiency, allowing conformance to worldwide Standby Mode efficiency guidelines.

  • WSaver® Technology Provides Ultra-Low Standby Power Consumption for Energy Star's 5-Star Level (<30mW)
  • Constant-Current (CC) Control without Secondary-Side Feedback Circuitry for Discontinuous Conduction Mode (DCM) and Continuous Conduction Mode (CCM)
  • Dual-Frequency Function Changes Switching Frequency (140kHz/85kHz) According to Input Voltage to Maximize Transformer Utilization and Improve Efficiency
  • Frequency Hopping to Reduce EMI Noise
  • High-Voltage Startup
  • Precise Maximum Output Power Limit by CC Regulation through External Resistor Adjustment
  • Peak-Current-Mode Control with Slope Compensation to Avoid Sub-Harmonic Oscillation
  • Programmable Over-Temperature Protection with Latch Mode through External NTC Resistor

  • VS Over-Voltage Protection with Latch Mode
  • VDD Over-Voltage Protection with Auto Restart
  • Available in MLP 4x3 Package

  • Battery Chargers for Smart Phones, Feature Phones, and Tablet PCs
  • AC-DC Adapters for Portable Devices or Battery Chargers that Require CV/CC Control

Additional Resources
FAN501 Datasheet FAN501 Datasheet
FAN501A Datasheet FAN501A Datasheet
  • Fairchild Semiconductor