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ADIADP5065兼容USB功率電能快速電池充電管理方案

2013-01-18

ADI公司的ADP5065是一款內(nèi)嵌互聯(lián)直流電壓充電輸出端與電池端的FET器件,通過(guò)FET可以實(shí)現(xiàn)電池隔離,當(dāng)系統(tǒng)驅(qū)動(dòng)電能來(lái)自于廢電池或沒(méi)有電池時(shí),系統(tǒng)會(huì)立即切換到USB供電模式。ADP5065的輸入電壓范圍為4V至5.5V,最大輸入電壓高達(dá)20V。ADP5065充電器兼容USB2.0、USB3.0和USB電池充電規(guī)范1.1。本文通過(guò)總結(jié)ADP5065器件的特點(diǎn),分別介紹器件、特性、應(yīng)用方向及內(nèi)部結(jié)構(gòu)框圖,并給參考設(shè)計(jì)實(shí)例原理圖、制板圖及元器件清單。

The ADP5065 charger is fully compliant with the USB 2.0, USB 3.0, and USB Battery Charging Specification 1.1 and enables charging via the mini USB VBUS pin from a wall charger, car charger, or USB host port.

The ADP5065 operates from a 4 V to 5.5 V input voltage range but is tolerant of voltages of up to 20 V. This alleviates the concerns about the USB bus spiking during disconnect or connect scenarios.

The ADP5065 also features an internal FET between the dc-to-dc charger output and the battery. This permits battery isolation and, hence, system powering under a dead battery or no battery scenario, which allows for immediate system function on connection to a USB power supply.
Based on the type of USB source, which is detected by an external USB detection chip, the ADP5065 can be set to apply the correct current limit for optimal charging and USB compliance.
The ADP5065 comes in a very small and low profile 20-lead WLCSP (0.5 mm pitch spacing) package.

ADP5065主要特性:

3 MHz switch mode charger

1.25 A charge current from dedicated charger

Up to 680 mA charging current from 500 mA USB host

Operating input voltage from 4.0 V up to 5.5 V

Tolerant input voltage −0.5 V to +20 V (USB VBUS)

Dead battery isolation FET between battery and charger output

Battery thermistor input with automatic charger shutdown for when battery temperature exceeds limits

Compliant with the JEITA Li-Ion battery charging temperature specification

SYS_EN_OK flag to hold off system turn-on until battery is at minimum required level for guaranteed

system startup due to minimum battery voltage and/or minimum battery charge level requirements

EOC programming with C/20, C/10 and specific current level selection

ADP5065應(yīng)用:

Digital still cameras

Digital video cameras

Single cell Li-Ion portable equipment

PDA, audio, GPS devices

Mobile phones


圖1. ADP5065方框圖

ADP5065設(shè)計(jì)原理圖:

圖2. ADP5065設(shè)計(jì)原理圖

ADP5065設(shè)計(jì)方案材料清單:


PCB元件布局圖:











 


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