Cypress MB39A134锂电池充电解决方案

cypress公司的MB39A134是用于锂电池充电的DC/DC转换器,采用脉宽调制(PWM)来单独控制充电电压和充电电流.器件内置独立于 DC/DC 转换器控制部分的 AC 适配器检测比较器,可控制系统的电压供给源,支持 2, 3 和 4Cell 电池包.主要用在笔记本电脑等的内置充电器和便携式终端机等.本文介绍了MB39A134主要特性,框图和应用电路及其所用元件列表,以及基于LPC MCU MB95F223K和MB39A134, MB95F223K的F²MC - 8FX锂电池充电器硬件框图,电路图,材料清单和PCB设计图.

The MB39A134 is a DC/DC converter IC for charging Li-ion battery, which is suitable for down conversion, and uses pulse widthmodulation (PWM) for controlling the charge voltage and current independently.

MB39A134 has a AC adapter detection comparator independent of the DC/DC converter controller, and can control the source ofpower supply to a system. It supports a wide input voltage range, enables low current consumption in standby mode, and cancontrol the charge voltage and charge current with high precision, which is perfect for the built-in Li-ion battery charger used indevices such as notebook PC.

MB39A134主要特性:

• Support 2, 3 and 4 Cell Battery Pack

• Built-in two constant current control loops

• Built-in AC adapter detection function (ACOK pin)

• Charge voltage accuracy :+/-0.7% (Ta =-10° C to 85° C)

• Built-in charging voltage control without external setting resistor (4.20 V/Cell or 4.10 V/Cell)

Adjustable to charge voltage with external resistor

• Built-in two high accurate current detection amplifiers (+/-1%) (At input voltage difference 100 mV)

(+/-5%) (At input voltage difference 20 mV)

Input offset voltage: 0 mV (Current Amp1)

: +3 mV (Current Amp2)

• Built-in Charging Current Contro...