器件名称:
FAN103
功能描述:
Primary-Side-Regulation PWM Controller
文件大小:
952.3KB 共16页
简 介:
FAN103 — Primary-Side-Regulation PWM Controller October 2009 FAN103 Primary-Side-Regulation PWM Controller Features Low Standby Power Under 30mW High Voltage Startup Fewest External Component Counts Constant-Voltage (CV) and Constant-Current (CC) Control without Secondary-Feedback Circuitry Green-Mode Function: Linearly-Decreasing PWM Frequency Fixed PWM Frequency at 50kHz with Frequency Hopping to Solve EMI Problem Cable Compensation in CV Mode 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 15V Fixed Over-Temperature Protection with Auto Restart Available in the 8-Lead SOP Package Description This third-generation Primary-Side-Regulation (PSR) and highly integrated PWM controller provides several features to enhance the performance of low-power flyback converters. The proprietary topology, TURECURRENT, of FAN103 enables precise CC regulation and simplified circuit for battery charger applications. A low-cost, smaller and lighter charger results as compared to a conventional design or a linear transformer. To minimize standby power consumption, the proprietary green-mode function provides off-time modulation to linearly decrease PWM frequency under light-load conditions. This green mode assists the power supply in meeting the power conservation requirement. By using the FAN103, a charger can be implemented with few extern……
