BQ34Z100-G1: volsel configuration

Julian Andres Gomez

Part Number: BQ34Z100-G1
Other Parts Discussed in Thread: BQ34Z100

volsel configuration
hello when setting the volsel parameter to 0 the indicator voltage is 6870 volts when I make the change to volsel at 1 the indicator voltage is 0 I use a sterile voltage divider for 12 volt lead battery

Thank you for your attentionarchivo12vpba7a.gg.csv

over 5 years ago

0 Andy Liu (BMS) over 5 years ago

TI__Guru 52115 points

Are you using a bq34z100-g1 EVM? If not, please provide the schematic.

Andy

0 Julian Andres Gomez over 5 years ago in reply to Andy Liu (BMS)

Intellectual 360 points

hello the design made for the bq34z100 g1 is an own design attached schematic
Thank you for your attention

0 Julian Andres Gomez over 5 years ago in reply to Andy Liu (BMS)

Intellectual 360 points

hello the design made for the bq34z100 g1 is an own design attached schematic
Thank you for your attention

0 Andy Liu (BMS) over 5 years ago in reply to Julian Andres Gomez

TI__Guru 52115 points

Are you working on a multi-cell application? If so, you need to enable the VEN pin.

I would suggest you follow our reference schematic (Figure 16) in the bq34z100-g1 datasheet to redesign your board.

Andy

0 Julian Andres Gomez over 5 years ago in reply to Andy Liu (BMS)

Intellectual 360 points

Hello for the design of the configuration with the pin see of the bq34z100 g1, it is necessary to implement the integrated bss84 and 2n7002, could you suggest that other integrated ones can be used as a replacement or what criteria should I have to implement different mosfets without affecting the measurements that perform the bq34z100
Thank you for your attention

0 Kang Kang over 5 years ago in reply to Julian Andres Gomez

TI__Mastermind 24870 points

Hello Julian,

I don't believe those are necessary.

The gauge portion just requires a voltage divider circuit, a sense resistor and a thermistor for I, V, T measurement.

0 Julian Andres Gomez over 5 years ago in reply to Kang Kang

Intellectual 360 points

Hello, thanks for the recommendation, in the case of using multiple cells, it is necessary to implement the pin see bq34z100 g1, my case is that of a 6-cell 2-volt lead battery

thank you for the attention

0 Julian Andres Gomez over 5 years ago in reply to Andy Liu (BMS)

Intellectual 360 points

hello, make the modifications by adding the skip and the respective adaptation to the pin, come.
the implemented mosfets are irf9507 and the irf540n the voltage presents an oscillation between 0 volts and 21 volts respectively
I must take some additional step to remove the oscillations.
the voltage is 12 volts from a lead battery
Thank you for your attention

0 Wyatt Keller over 5 years ago in reply to Julian Andres Gomez

TI__Guru** 105760 points

Hello Julian,

The 21V cannot be generated from the gauge and is most likely coming from external sources on your board.

Sincerely,

Wyatt Keller

Power management

Power management forum

BQ34Z100-G1: volsel configuration