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Hi
The customer design with 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+?
32S battery with two BQ7695202 in series do not use current sampling, only use voltage sampling function,
How to connect LD and PACK when BQ7695202 is not using current collection?
Waiting for your reply.
Thanks
Star
Hi Star,
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:
Regards,
Max Verboncoeur
Hi Star,
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.
Regards,
Max Verboncoeur
