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This literature is subject to all applicable copyright laws and is not for resale in any manner.FAN302UL PWM Controller for Low Standby Power Battery-Charger Applications mWSaver Technology January 2013 FAN302UL PWM Controller for Low Standby Power Battery- Charger Applications mWSaver Technology Features Description mWSaver Technology Provides Advanced PWM controller FAN302UL significantly Best-in-Class Standby Power simplifies isolated power supply designs that require Constant Current (CC) regulation of the output. The Achieves <10 mW, Far Below Energy Stars 5-Star output current is precisely estimated with information in Level (<30 mW). the primary side of the transformer and controlled with Proprietary 500 V High-Voltage JFET Startup an internal compensation circuit, not only removing the Reduces Startup Resistor Loss output current sensing loss, but also eliminating external CC control circuitry. A Green-Mode function with an Low Operation Current in Burst Mode: extremely low operating current (200 A) in Burst Mode 350 A Maximum maximizes light-load efficiency, enabling conformance Constant-Current (CC) Control without Secondary- to worldwide Standby Mode efficiency guidelines. Side Feedback Circuitry Integrated protections include two-level pulse-by-pulse Fixed PWM Frequency at 140 kHz with Frequency current limit, Over-Voltage Protection (OVP), brownout Hopping to Reduce EMI protection, and Over-Temperature Protection (OTP). High-Voltage Startup Compared with a conventional approach using external control circuit in the secondary side for CC regulation Low Operating Current: 3.5 mA the FAN302UL reduces total cost, component count, Peak-Current-Mode Control with Slope size, and weight, while simultaneously increasing Compensation efficiency, productivity, and system reliability. Cycle-by-Cycle Current Limiting Maximum V O V Over-Voltage Protection (Auto-Restart) Typical DD Minimum V Over-Voltage Protection (Latch Mode) S V Under-Voltage Lockout (UVLO) DD Gate Output Maximum Voltage Clamped at 15 V Fixed Over-Temperature Protection (Latch Mode) Available in an 8-Lead SOIC Package Applications I O Battery chargers for cellular phones, cordless phones, Figure 1. Typical Output V-I Characteristic PDA, digital cameras, and power tools. Replaces linear transformers and RCC SMPS. Ordering Information Operating Packing Part Number Package Temperature Range Method 8-Lead, Small-Outline Integrated Circuit (SOIC), FAN302ULMY -40C to +105C Tape & Reel JEDEC MS-012, .150-Inch Narrow Body 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN302UL Rev. 1.0.4