BQ24070: Running BQ24070 Devices in Parallel

Damon Kutten

Part Number: BQ24070

To gain additional output current capacity, I want to connect four of these devices in parallel. Each device would have the same input voltage source, and connection to the same high-current battery. The status and control signals would be managed separately for each device. The output of each device would be independent and isolated.

Is this possible to do?

Thanks,

Damon

over 8 years ago

0 Raheem over 8 years ago

TI__Mastermind 21590 points

Damon,

I'll suggest you use a switching charger instead to get higher charge currents. They can be found here.

Regards,

Raheem

0 Damon Kutten over 8 years ago in reply to Raheem

Prodigy 90 points

Raheem,

Yes, a switching charger would handle higher current, but I would like to know if there are any issues specifically with using the BQ24070 in this configuration.

Regards,

Damon

0 Raheem over 8 years ago in reply to Damon Kutten

TI__Mastermind 21590 points

Hello,
Since there is no feedback with the linear chargers, there will be a lot of timing issues with connecting them in parallel.
Regards,
Raheem

0 Damon Kutten over 8 years ago in reply to Raheem

Prodigy 90 points

Raheem,

By "timing issues" do you mean that it would be difficult for each device to know when charging has completed?

Regards,

Damon

0 Raheem over 8 years ago in reply to Damon Kutten

TI__Mastermind 21590 points

Damon,
That is correct. Different batteries terminate at different times. This will be difficult to achieve if the batteries are in parallel.
Regards,
Raheem

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BQ24070: Running BQ24070 Devices in Parallel