SG6849 Datasheet | Fairchild Semiconductor

- Low-Power, Green-Mode PWM Flyback Power Controller without Secondary Feedback Low-Power, Green-Mode PWM Flyback Power Controller without Secondary Feedback Features - Linearly Decreasing PWM Frequency - Green-Mode Under Light-Load and Zero-Load Conditions - Constant Voltage (CV) and Constant Current (CC) - No Secondary Feedback - Low Startup Current: 5μA - Low Operating Current: 3.6m A - Leading-Edge Blanking (LEB) - Constant Power Limit - Universal AC Input Range - Synchronized Slope pensation - 150°C OTP Sensor with Hysteresis - VDD Over-Voltage Clamping - Cycle-by-Cycle Current Limiting - Under-Voltage Lockout (UVLO) - Fixed PWM Frequency: 65k Hz - Gate Output Maximum Voltage Clamped at 16.7V - Small SSOT-6 Package Applications Low-power, flyback power converters, such as: - Battery chargers for cellular phones, cordless phones, PDAs, digital cameras, and power tools - Power adapters for ink jet printers, video game consoles, and portable audio players - Open-frame SMPS for TV/DVD standby and other auxiliary supplies, home appliances, consumer electronics, and PC 5V standby-power - Replacements for linear transformers and RCC SMPS Description This highly integrated PWM controller provides several Features to enhance the performance of low-power flyback converters. To minimize standby power consumption, the proprietary green-mode function provides off-time modulation to linearly decrease the switching frequency under light-load and zero-load conditions. This green-mode function enables the power supply to meet international power conservation...