BQ76952: How-to daisy chain for more cells

Hi Guillermo,

The BQ76952 has no features to directly make it stackable.  If you connect 2 devices to different stacked cells You can add external circuits to allow a MCU to communicate with the upper device through a communication isolator or level shift circuit.  ALERT from the upper device can be level shifted to signal the MCU to take action.  For the protection signals DDSG and DCHG can be used to input to DFETOFF and CFETOFF of the other device.  The high side DSG driver does not have a negative voltage range so some circuit will be required if you want high side switching.  Low side switching may be accomplished using appropriate external drivers and if you have a communication port it will likely need isolation. No reference design or schematic is presently available.  While it is for a different family of devices and not all circuits will apply, see TIDA-01093 for an example of stacking parts which do not directly support stacking.

Thanks for you fast reply.

I was considering the same i2c isolating device. It is one of the cheapest available on the market.
However, I used before npn-pnp level-shifter for uart transmision between mcu at different voltage level in cell packs.

Thanks