Offline DCM / CCM Flyback PWM Controller
FAN501 — Offline DCM / CCM Flyback PWM Controller for Charger Applications
April 2014
FAN501 Offline DCM / CCM Flyback...
Description
FAN501 — Offline DCM / CCM Flyback PWM Controller for Charger Applications
April 2014
FAN501 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 with CCM Operation in Typical 10 W to15 W 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
VS Over-Voltage Protection with Latch Mode
VS Under-Voltage Protection with Auto-Restart
VDD Over-Voltage-Protection with Auto-Restart Available in MLP 4 X 3 Package
Description
The advanced PWM controller, FAN501, 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 ci...
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