Austriamicrosystems AS3610 USB兼容锂电池充电解决方案

1、austriamicrosystems as3610 usb兼容锂电池充电解决方案austriamicrosystems公司的as3610/11是兼容的降压锂电池充电器,1.25a 3mhz dc/dc充电器,100/500ma usb限制,其它电流限制900a,可通过otp rom编程.充电器还能产生用于usb otg的5.05v输出,22v过压庇护,主要用在手机和手持设备的单个锂电池充电器.本文介绍了as3610/11主要特性,方框图, usb检测框图以及as3610-db演示板和布局图.as3610/11: usb compliant step down charger for li -

2、ion portable devicesthe as3610/11 is a highly integrated standalone or optional i2c controlled step down charger. all supervision and regulation functions are realized internal and independent from the processor.the 100/500ma usb current limit can be set via a dedicated control pin. other limits lik

3、e 900ma can be programmed in the otp rom. in addition, the charger can generate a 5.05v output supply at vbus for usb otg.as3610 features an i2c interface which can be used by a microcontroller to fully control all functionality of the chip. charging current and eoc current can be set with external

4、resistors and adjusted via register settings if needed.as3611 is a stand-alone version of this charger ic. charging and eoc current is set by resistor only. functions like otg boost mode or max current limit for wall adapter mode can be enabled using dedicated pins.as3610/11主要特性:dcdc usb charger1.25

5、a, 3mhz dcdc chargerotg boost with low iq (700;a) up to 500ma22v over voltage protectionseamless 100% modereverse polarity protection on vbusntc supportlow side driverno external shunt resistor required“no battery” operation without voltage droppackage: mlpd14 3x3mmthe as3610/11 device serves as a s

6、tandalone battery charge controller supporting rechargeable lithium ion (li+) batteries. requiring only a few external components, a full-featured battery charger with a high degree of flexibility can easily be realized. the main features of the controller are:charge adapter detectioninternal voltage regulatorlow current (soft) charginglow current (trickle) chargingconstant current chargingconstant voltage charging22v input overvoltage protectionbattery presence indicationoperation without batteryinput current limitationinput voltage drop regulat