This third-generation Primary-Side-Regulation (PSR)and highly integrated PWM controller provides severalfeatures to enhance the performance of low-powerflyback converters. The proprietary topology,TRUECURRENT®, of FAN103W enables precise CCregulation and simplified circuit for battery chargerapplications. A low-cost, smaller and lighter chargerresults as compared to a conventional design or a lineartransformer.To minimize standby power consumption, theproprietary green-mode function provides off-timemodulation to linearly decrease PWM frequency underlight-load conditions. This green mode assists the powersupply in meeting the power conservation requirement.By using the FAN103W, a charger can be implementedwith few external components and minimized cost. Atypical output CV/CC characteristic envelope is shownin Figure 1.
●Features
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● 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
