BQ40Z50-R1: Bq40z50-r1 precharged prohibition

Jason Zhao58

Part Number: BQ40Z50-R1

Hi,

How is the precharge of bq40z50-r1 prohibited? We see a data manual describing Setting the Precharge Start Voltage and Charging Voltage Low = 0 mVdisables the Precharge function.

However, in actual use, even after we set Precharge Start Voltage and Charging Voltage Low = 0 mV, we find out the pre-charging section, still have action.

over 7 years ago

0 WM5295 over 7 years ago

TI__Guru 54715 points

Hi Jason,
I don't see any issue recorded with this feature. What is your pack configuration and what is the action you see? Please post a configuration file and log of the improper behavior.

0 Swaminathan Ramanathan75031 over 7 years ago

TI__Expert 6575 points

Hi Jason,
There will not be a voltage setting that will prevent the pre-charge range from being indicated. There is a diagram in Section 4.3 of the TRM that has a picture that explains this. (www.ti.com/.../sluubc1)
Also the section 4.9 explains how the pre-charge indication works, and how to use the Charge FET for precharge range in case you would not like to use a pre-charge circuit.
Regards,
Swami

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BQ40Z50-R1: Bq40z50-r1 precharged prohibition