FAN103W: Primary-Side-Regulation PWM Controller (PWM-PSR)
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
- 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
Ordering CodeProduct | Product & Eco Status | Unit Price/1K Order | Packing Method Convention | Package Marking Convention* |
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FAN103WMY | Full Production
Green as of Oct 2010
China RoHS
Restrictions apply. Not to be shipped into the U.S.A. | $0.4788 | SO 8L NB
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1.75 x 3.9 x 4.9mm,
TAPE REEL | Line 1$Y (Fairchild logo) &Z (Plant Code) &2 (2-Digit Date Code) &K
Line 2FAN103
Line 3WMYR
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