tps6507x and Battery life

tommy tommy

Prodigy 30 points

Other Parts Discussed in Thread: TPS65070, BQ27510, BQ27541

HI,I use Tps65070 in my ARM11 board,hardware use PMIC tps65070,Board use Linear Battery(4.2V),MY board use linux.

I found that Linux has support tps65070 PMIC driver,in following directory:

drivers/mfd/tps6507x.c

drivers/regulator/tps6507x-regulator.c

How can i use them to implement a PM driver that can display battery life such as (10%,20%,30%....%100,Charging etc).

Tommy

over 14 years ago

0 Matthew Day over 14 years ago

TI__Mastermind 36110 points

We are unable to assist with software drivers for this IC at this time. The TPS65070 contains an A/D converter that measures the battery voltage as well as many other parameters. You can use this to calculate a rudimentary voltage based battery life indicator. TI's line of gas gauges provide much more accurate battery life measurements if you choose to take this approach.

0 tommy tommy over 14 years ago in reply to Matthew Day

Prodigy 30 points

According to My HW design,PMIC Internal A/D converter need to use for other functions.

BTW,Internal A/D converter driver ,TI has implemented or not ?Or I just implement by self,by I2C Read/Write?

0 Matthew Day over 14 years ago in reply to tommy tommy

TI__Mastermind 36110 points

You can control the TPS65070 A/D with the I2C settings. You can turn it on and off, select which A/D to read via the I2C interface.

0 tommy tommy over 14 years ago in reply to Matthew Day

Prodigy 30 points

Staff in deyisupport,told me that TPS65070 Just integrate a 2A charger unit,if just use CPU to drive TPS65070 To implement Batter life monitor,is not enough,need to use bq27510/bq27541 to implement batter monitor.

0 Matthew Day over 14 years ago in reply to tommy tommy

TI__Mastermind 36110 points

If you need accurate battery life indication, I agree that you need a gas gauge (bq27510). Otherwise, you can use the onboard A/D to monitor battery voltage. Determining battery life from battery voltage is not very accruate. You must evaluate your needs and make the decision on which solution you want to use.

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tps6507x and Battery life