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AN-6067
Design and Application of Primary-Side Regulation (PSR)
PWM Controller
FAN100 / FAN102 / FSEZ1016A / FSEZ1216
Abstract
This application note describes a typical charger using the
PSR controller. Both the features of this controller, as well
as the operation of the power supply adaptor, are presented
in detail. Based on the proposed design guideline, a design
example with detailed parameters is given to demonstrate
the superior performance of the controller.
Applications
Battery chargers for cellular phones, cordless phones,
PDAs, digital cameras, power tools
Optimal choice for the replacement of linear
transformers and RCC SMPS
Features
Constant-Voltage (CV) and Constant-Current (CC)
Control without Secondary-Feedback Circuitry
Accurate Constant Current Achieved by Fairchild’s
Proprietary TRUECURRENT™ Technique
Green-Mode Function: PWM Frequency Decreasing
Linearly
Fixed PWM Frequency at 42kHz with Frequency
Hopping to Solve EMI Problems
Low Startup Current: 10μA (Typical)
Low Operating Current: 3.5mA (Typical)
Peak-Current-Mode Control
Cycle-by-Cycle Current Limiting
VDD Over-Voltage Protection (OVP)
VDD Under-Voltage lockout (UVLO)
Gate Output Maximum Voltage Clamped at 18V
Fixed Over-Temperature Protection (OTP)
Cable Compensation for Tight CV Regulation
(FAN102 / FSEZ1216)
PSR PWM Controller
FAN100
FAN102
FSEZ1016A
FSEZ1216
PSR PWM Controller
FAN100 + Cable Compensation
FAN100 + MOSFET (1A/600V)
FAN102 + MOSFET (1A/600V)
Pin Configurations
Figure 1. FAN100
Figure 2. FAN102
© 2008 Fairchild Semiconductor Corporation
Rev. 1.0.1 • 1/26/10
Figure 3. FSEZ1016A
Figure 4. FSEZ1216
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