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FAN104W 平板电脑和智能手机电池充电解决方案
发布时间:2012/9/15 10:24:00 来源:
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Fairchild公司的FAN104W是高频初级调整的PWM控制器,能提高低功率反激转换器的性能.待机功耗小于30mW,满足能量之星五星标准,突发模式工作电流600uA,具有输出短路保护,输出过压保护(VSOVP),VDD过压保护和超温保护等功能,主要用在智能手机,PAD,PDA和数码相机电池充电器等.本文介绍了FAN104W主要特性,方框图,典型应用电路以及10W平板电脑和智能手机充电器参考设计主要特性,电路图,变压器电路和PCB布局图.
This highly integrated PWM controller, FAN104W, provides several features to enhance the performance of low-power flyback converters. The proprietary topology of FAN104W enables simplified circuit design for battery charger applications. The result is a lowercost,smaller, and lighter charger compared to a conventional design or a linear transformer.To minimize standby power consumption, a proprietary green-mode function provides off-time modulation to linearly decrease PWM frequency under light-load conditions. Green Mode assists the power supply in meeting power conservation requirements. By using FAN104W, a charger can be implemented with few external components and minimized cost.


FAN104W主要特性:
 Achieves <30 mW; Energy Star’s 5-Star Level
 Proprietary 500 V High-Voltage JFET Startup Reduces Startup Resistor Loss
 Low Operation Current in Burst Mode: 600 μA
 Constant-Voltage (CV) and Constant-Current (CC)
Control without Secondary-Feedback Circuitry
 Green Mode: PWM Frequency Linearly-Decreasing
 PWM Frequency at 85 kHz with Frequency Hopping to Solve EMI Problem
 Boundary-Conduction-Mode (BCM) Operation at Lower AC Input Voltage
 Cable Compensation in CV Mode
 Cycle-by-Cycle Current Limiting
 Gate Output Maximum Voltage Clamped at 14 V
 VDD Under-Voltage Lockout (UVLO) Available
 Built-in Protections:
- Output Short-Circuit Protection
- Output Over-Voltage-Protection (VSOVP) with Latch Mode
- VDD Over-Voltage-Protection (VDD OVP)
- CS Pin Single-Fault Protection
- VS Pin single-Fault Protection
- Over-Temperature-Protection (OTP) with Latch Mode
 SOIC Package

FAN104W应用:
 Battery chargers for smart phones, Pad, PDA,digital cameras.
 Best choice to replace linear transformer and RCC SMPS

图1.FAN104W方框图

图2.FAN104W典型应用电路图

10W平板电脑和智能手机充电器参考设计

This reference design supports inclusion of the FAN104W in the design of a 10W charger with BCM operation and Primary-Side Regulation (PSR) technology. It should be used in conjunction with the FAN104W datasheet as well as Fairchild’s application notes and technical support team.

10W充电器参考设计主要特性:
 Low Standby-Power Consumption: < 50mW at 264VAC
 Constant-Voltage (V) and Constant-Current (CC) Control without Secondary-Feedback Circuitry
 PWM Frequency at 85kHz with Frequency Hopping to Reduce EMI
 Frequency-Reduction Technology for BCM Operation
 Cable-Voltage-Drop Compensation in CV Mode
 High-Voltage Startup
 Low Burst-Mode Operating Current: 600A(Typical) and Normally-Operating Current: 3.5mA (Typical)
 Output Over-Voltage Protection (OVP), VDD Over-Voltage Protection (OVP),VDD Under-Voltage Lockout (UVLO), Over-Temperature Protection (OTP),CS-Pin- Short Protection, VS-Pin Single-Fault Protection
 SOIC-8 Package

图3.10W充电器参考设计电路图

图4.10W充电器参考设计变压器电路图


图5.10W充电器参考设计外形图

图6.10W充电器参考设计PCB布局图

 
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