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BQ20Z75不工作问题



BQ20Z75装机不工作,1脚及38脚无输出,电池为2P3S,VCC为电池电压,REG33 3.3V正常,REG25  2.5V正常,请问此IC是否还要烧录程序吗?此款产品是老机种,之前直接购买此IC就能工作的,最近购买的IC就不能工作,换了BQ20Z75-V160,BQ20Z75-V180 IC都不能工作