FAN102 − Primary-Side-Regulation PWM Controller

The primary-side PWM controller significantly simplifies power supply design that requires CV and CC regulation capabilities. The FAN102 controls the output voltage and current precisely with the information in the primary side of the power supply, not only removing the output current sensing loss, but eliminating all secondary feedback circuitry. The green-mode function with a low startup current (10µA) maximizes the light-load efficiency so the power supply can meet stringent standby power regulations. Compared with a conventional secondary-side regulation approach, the FAN102 can reduce total cost, component count, size, and weight; while simultaneously increasing efficiency, productivity, and system reliability.

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Product Status/Pricing/Packaging

Product Product & Eco Status *Pricing Packaging & Packing Info **Package Marking Convention Qualification Support Compliance Certificates
0 FAN102MY Full Production
Green as of Aug 2008
$0.43 SO 8L NB Details TAPE REEL Line 1:$Y (Fairchild logo)
&Z (Plant Code)
&2 (2-Digit Date Code) &K
Line 2:FAN102
Line 3:MYI
FIT :  1  
ESD (CDM) :  1250  V
ESD (HBM) :  4500  V
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Features

  • Constant-Voltage (CV) and Constant-Current (CC) Control without Secondary-Feedback Circuitry
  • Green Mode: Frequency Reduction at Light Load
  • Fixed PWM Frequency at 42kHz with Frequency Hopping to Solve EMI Problem
  • Cable Voltage Drop Compensation in CV Mode
  • Low Startup Current: 10µA
  • Low Operating Current: 3.5mA
  • 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 18V
  • Fixed Over-temperature Protection with Auto Restart
  • SOP-8 Package Available

Applications

  • Mobile Handsets
  • Lighting

Application Notes

Reference Designs

Application Document Number Featured Products Output
Power
Input
Voltage
Topology
Cell Phone Charger RD-336 FAN102 3.9W 90-265VAC Primary-Side Regulated Flyback Converter


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