FAN102

FAN102 — Primary-Side-Control PWM Controller FAN102 Primary-Side-Control PWM Controller Features  Constant-Voltage (CV) and Constant-Current (CC) Control without Secondary-Feedback Circuitry  Green Mode: Frequency Reduction at Light Load  Fixed PWM Frequency at 42 kHz with Frequency Hopping to Reduce EMI  Cable Voltage Drop Compensation in CV Mode  Low Startup Current: 10 μA  Low Operating Current: 3.5 mA  Peak-Current-Mode Control in CV Mode  Cycle-by-Cycle Current Limiting  VDD Over-Voltage Protection with Auto-Restart  VDD Under-Voltage Lockout (UVLO)  Gate Output Maximum Voltage Clamped at 18 V  Fixed Over-Temperature Protection with Auto- Restart  SOP-8 Package Available Applications  Battery Chargers for Cellular Phones, Cordless Phones, PDA, Digital Cameras, Power Tools  Replaces Linear Transformer and RCC SMPS  Offline High Brightness (HB) LED Drivers Description The primary-side PWM controller significantly simplifies power supply design that requires CV and CC regulation capabilities. The FAN102 controls the output voltage and current precisely with the information in the primary side of the power supply, not only removing the output current sensing loss, but eliminating all secondary feedback circuitry. The green-mode function with a low startup current (10 µA) maximizes the light-load efficiency so the power supply can meet stringent standby power regulations. Compared with a conventional secondary-side regulation approach, the FAN102 can reduce...