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电源管理BQ29700

BQ29700保护芯片  在使用时,若电池第一次连接  需要将V- 和VSS 短接多久?才能使能放电功能????

电池现在已经和板子连接  但是29700的DOUT 对地是负的电池电压  是什么问题? COUT 对地是0????

求助。。。