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关键词: Fairchild , FAN302HL , 充电器 , 手机
Fairchild公司的FAN302HL是高度集成的PWM控制器,采用mWSaver™技术,提供业界最好的待机功耗,低于10mW,远低于能源之星的30mW要求.固定的PWM频率85kHz和跳频技术解决了EMI问题.主要用在手机,无绳电话,PDA和数码相机以及电动工具等的电池充电器.本文介绍了FAN302HL主要特性,方框图, 反激转换器电路图, 典型应用电路图以及采用FAN302HL的5V / 1A PSR手机电池充电器主要指标,电路图,材料清单和PCB布局图.
2011-12-29 12:38:19 上传
FAN302HL: mWSaver™ PWM Controller for Low Standby Power Battery-Charger Applications
This highly integrated PWM controller, FAN302HL, provides several features to enhance the performance of general flyback converters. The constant-current control, proprietary topology enables simplified circuit designs without secondary feedback circuitry for batterycharger applications. A proprietary Burst-Mode function with low operation current minimizes standby power consumption.
The FAN302HL controller also provides several protections. Cycle-by-cycle current limiting ensures the fixed peak current limit level, even if a short circuit occurs. The gate output is clamped at 15V to protect the power MOS from high gate-source voltage conditions. If either VS OVP or internal OTP is triggered, the circuit enters Latch Mode until AC power is removed.
Using FAN302HL, a charger can be implemented with few external components and minimized cost, compared to a conventional design or a linear transformer.
FAN302HL主要特性:
mWSaver™ Technology Provides Industry’s Bestin-Class Standby Power
- Achieve Under 10mW; Far Below Energy Star’s 5-Star Level (<30mW)
- Proprietary 500V High-Voltage JFET Startup Reduces Startup Resistor Loss
- Low Operation Current in Burst Mode: Maximum 350μA
Constant-Current (CC) Control without Secondary-Feedback Circuitry
Fixed PWM Frequency at 85kHz with Frequency Hopping to Solve EMI Problem
Low Operating Current: 3.5mA
Peak-Current-Mode Control in CV Regulation
Cycle-by-Cycle Current Limiting
VDD Over-Voltage Protection (Auto-Restart)
VS Over-Voltage Protection (Latch Mode)
VDD Under-Voltage Lockout (UVLO)
Gate Output Maximum Voltage Clamped at 15V
Fixed Over-Temperature Protection (Latch Mode)
Available in an 8-Lead SOIC Package
FAN302HL应用:
Battery chargers for cellular phones, cordless phones, PDA, digital cameras, and power tools. Replaces linear transformers and RCC SMPS.
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