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Fairchild FAN302HL低待机功耗PWM电源控制方案

文章出处:8gled.com作者:格烁光电发表时间:2018-07-23
成都代孕-产后频道uGlU【承诺帮你成功】Fairchild公司的FAN302HL是低待机功耗电池充电器用的PWM电源代孕产子-【了解助孕第一选择H1mN】孕期频道控制器,采用恒流模式控制,在230VAC时的带机功耗低于10mW,固定PWM频率85kHz和跳频,以降低EMI,工作电流3.5A,栅极输出最大电压箝位在15V,具有高压起动功能,主要用在手机,无绳电话,PDA和数码相机等电池充电器.本文介绍了FAN302HL主要特性, 功能方框图, 高压(HV)起动电路图, 反激转换器电路图和典型应用电路图以及变压器结构图和绕组指标.

FAN302HL 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:

Ultra-Low Standby Power: Under 10mW at 230VAC

Constant-Current (CC) Control without Secondary- Feedback Circuitry

Fixed PWM Frequency at 85kHz with Frequency Hopping to Solve EMI Problem

High-Voltage Startup

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.

图1.FAN302HL功能方框图

图2.FAN302HL简化反激转换器电路图

图3.FAN302HL高压(HV)起动电路图

图4.FAN302HL典型应用电路

图5.FAN302HL典型应用电路图

图6.FAN302HL变压器结构图
变压器绕组指标:


成都代孕-产后频道uGlU【承诺帮你成功】 Fairchild FAN302HL低待机功耗PWM电源控制方案原创编辑请注明出来http://www.yzxinfa.com

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