TI中文支持网Part Number:BQ76952Other Parts Discussed in Thread:TIDA-010247
Our product is used in 32S battery with two BQ7695202 in series. Currently, the AFE PACK Pin and LD pin on the low side are connected to GND. Actually, the REG1 and REG2 pins of the AFE on the low side have no voltage output, while the AFE PACK pin and LD pin on the high side are connected to B32+. The two pins of REG1 and REG2 on the high side of AFE have voltage output, and the voltage is 5.6V. May I ask whether the AFE PACK and LD pins on the low side should be connected to B16+? Or could you please provide the recommended connection position of LD and PACK pins
Star Xu：
您好， LD 和PACK级联接法请参考参考设计TIDA-010247
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Xiang Yang：
这边32串两个BQ7695202均未用到电流采样，只用到电压采样功能，TIDA-010247中的参考设计中有电流采样功能，BQ7695202没有用电流采集时，请问下LD和PACK怎么接
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Star Xu：
您好，正在询问更了解这款芯片的TI工程师，稍后回复。
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Xiang Yang：
您好，请问下工程师那边有回复了吗
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Star Xu：
您好，请参考下面内容
The answer depends on whether the FET configuration is high-side or low-side.
For high-side, see the TIDA-010247 reference design schematic for how we recommend connecting the LD and PACK pins on both devices.
For low-side, see the figure below, take from this application note:
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Xiang Yang：
AFE不采电流，PACK和LD怎么接呢
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Star Xu：
您好，已经在E2E英文论坛发帖，请继续关注。
e2e.ti.com/…/bq76952-two-bq7695202-cascade-how-to-connect-ld-and-pack-pin
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Star Xu：
您好，您的FET是高侧还是低侧？
If the FETs are high-side, I recommend reading this application note to provide some more information on high-side stacked configurations.
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Xiang Yang：
我们这边32串用两个AFE级联，两个AFE均只做电压、温度采集，不控制充放电MOS和不采集充放电电流
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Star Xu：
您好，正在询问更了解这款芯片的TI工程师，稍后回复。
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Star Xu：
您好，If the devices are only for measuring voltage and temperature, then the PACK and LD pins can be connected as show in the diagram below, except for the LD on the lower device, which can be shorted directly to VSS on the lower device.
