一種超低功耗鋰離子電池保護(hù)電路設(shè)計(jì)

基于減少鋰離子電池能量的額外損耗，本文設(shè)計(jì)了一款超低功耗鋰離子電池保護(hù)電路。
本電路不僅可以對(duì)鋰離子電池進(jìn)行全面有效的保護(hù)，而且實(shí)現(xiàn)了低功耗。利用MOSFET 的亞閾值導(dǎo)電特性，使電路消耗的電流小于3μA；并且芯片在檢測(cè)到過放電時(shí)進(jìn)入到休眠狀態(tài)，此時(shí)電路消耗的電流僅為0.2μA 左右，大大減少了不必要的能量損耗。
關(guān)鍵詞：亞閾值，低功耗，保護(hù)電路，鋰離子電池
An Ultra Low Power Li-ion Battery Protection circuit Design
Feng Xu, Hu Jiamin, Han Min, Wang Songlin
（School of Mechano-electronic Engineering,Xi Dian University,xi’an,710071,china）
Abstract：The paper presents an ultra low power Li-ion battery protection circuit based on reducing the extra
energy waste of Li-ion battery. The circuit not only protects Li-ion battery effectively, but also achieves low power.
Taking advantage of the MOSFET’s sub-threshold characteristics, the current consumption of this circuit is lower
than 3μА. Once the over-discharge is detected, the whole circuit is shut down with a standby current of 0.2μА,which greatly reduces unnecessary energy consumption.
Key words: Sub-threshold, Low Power, Protection circuit, Li-ion Battery