Offline DCM / CCM Flyback PWM Controller
FAN501A — Offline DCM / CCM Flyback PWM Controller for Charger Applications
April 2014
FAN501A Offline DCM / CCM Flyba...
Description
FAN501A — Offline DCM / CCM Flyback PWM Controller for Charger Applications
April 2014
FAN501A Offline DCM / CCM Flyback PWM Controller for Charger Applications
Features
WSaver® Technology Provides Ultra-Low
Standby Power Consumption for Energy Star’s 5-Star Level (<30 mW)
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 (140 kHz / 85 kHz) According to Input Voltage to Maximize Transformer Utilization and Improve Efficiency
High Power Density and High Conversion
Efficiency in CCM Compact Charger Applications
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
Two-Level UVLO Reduces Input Power in Output
Short Situation
VS Over-Voltage Protection with Latch Mode VDD Over-Voltage Protection with Auto Restart Available in MLP 4 X 3 Package
Description
The advanced PWM controller, FAN501A, 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 t...
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