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BQ25756: 输出电压设置

Part Number: BQ25756

使用BQ25756电源芯片,通过配置FB反馈电压来得到输出电压,遇到问题如下:

1.配置3串电池组,上电阻选择249K,下电阻选择34.8K,VFB=1.536V,公式计算输出电压12.5V,实际测量12.5V满足要求;

2.配置10串电池组,上电阻选择249K,下电阻选择9.53K,VFB=1.536V,公式计算输出电压41.6V,实际测量只有37V。

请问在配置10串电池组时,为什么输出电压达不到计算的电压?需要配置哪里吗