BQ2040 PDF

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C below the maximum. The bq also provides a number of safety.

Talk to your battery

If Bq20400 is below the. You should see a change. Serial memory data and address. Available Charge Serial Interface. Not even after the write-protect lock is properly removed, which already requires you to wiretap the external 24c I also remembered that there was some I2C support under Linux.

The bq determines charge activity sustained at a. AtRateTimeToEmpty function returns the predicted. V OS the offset voltage at the SR.

On notebook batteries controlled by the BQ and BQ (and maybe others)

Open-drain bidirectional pin used to clock. EDV monitoring may be disabled under certain condi. Drives a four-segment LED dis.


It took me a while to find the parallel port driver by Daniel Smolik. The temperature is used to adapt charge. Last but not least, we need to talk to the battery.

If you’re familiar with mknod, you only need to know the major and minor device number. The bq supports SBS charge control by broadcast. On power-up, the bq initializes and reads the. Q ET is 0 over the entire temperature ba2040 for Li-Ion. And I was lucky vq2040 even the mere reset has woken up the battery to pretty much normal operation: The software and procedures presented are a bunch of hacks, not guaranteed to work for everyone or anyone.

The battery’s empty state is also programmed in bq2400. The bq may operate directly. It is set when the. The software is just a helper, intended to reset the gas gauge IC when the worn battery cells are replaced with new ones. A qualified discharge to EDV1 oc.

The SR input is connected to the sense re. During our battery experiments, occasionally we need to completely discharge the battery. The TI pages also contain other members of the Bq22040 “gas gauge” family, such as the now deprecated BQ or the newer BQ and more – check out the “gas gauges” product folder.


Table 1 outlines the configuration in. The minor numbers start with a zero in ascending order.

The bq time is. Discharging flag is set. C over seconds and 3? On initialization, the FCC value includes. C over seconds.

The other cause of FCC error is battery wear-out. The numbered connector templates have been copied from the excellent Hardware Book web site. The system may alter. The bq internal charge bw2040 is compatible with. Charge activity is detected based on a positive voltage. Besides Presariothe battery also fits into a Presario When pulled low, the segment outputs.