Part Number: BQ25750 Hi
We had some problems when we tested the BQ25750EVM:
1/
When the BAT is charging and the VSYS is discharging(about >3.2A) simultaneously, then we power off the AC source , the VSYS can not work continuously and the BAT can not discharge…
Hi Ethan,
got it, thanks for your help and reply,
may i know why is the BQ25750EVM devlopment board only design for input range of 4.2~55v? and charge voltage only 30v?
the ic can reach 70v input & output, right?
Hello Deepakji,
Here are the BQ25750 design files: BQ25750EVM(2025Feb12).zip
When using an 8S battery, I recommend installing a 10Ω resistor in series with BATDRV and the BATFETs and a 10nF capacitor from BATDRV to BATSRC.
We also have an FAQ on…
Hello Subramanian,
I recommend refering to the BQ2575xFAQ homepage: https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1357460/faq-bq2575x-central-faq-page?tisearch=e2e-sitesearch&keymatch=BQ2575x#
Here you…
Part Number: BQ25792 Other Parts Discussed in Thread: BQ77915 , BQ25750 , BQ25750EVM , TPS25751EVM Tool/software: Hi,
I am designing a USBC-PD charging circuit for a LiPo battery pack used in our UAV. I was intending to use a 3 chip solution:
TPS25751S -…
Hello Mulin,
Mulin Chou said: VBATLOWV not in the SPEC
VBATLOWV is a percentage because the VBATLOWV voltage will change as the battery charge voltage setting changes.
Mulin Chou said: When the CV mode, ICHG spikes.
What's your test set up here? Are you…
Hello Tamura,
The BQ25750 does not have a PSPICE model. We do have the BQ25750EVM available for testing though.
Let me know if you have any questions about this.
Best Regards, Ethan Galloway
Part Number: BQ25750 Tool/software: Hi,
In the section “8.3.3.1 VAC Operating Window Programming (ACUV and ACOV)” in DATASHEET (SLUSDY3 - DECEMBER 2023), is there a lower limit for the intermediate resistance RAC2? I would like to know along…
Hi Ethan,
With these registers, the power supply was connected to the charger VAC.
I had to remove the JP4 for the charging voltage to appear on the BAT connector.
I see that the BQ25750EVM was released with a power path, so I will be changing to that…
Hello Paolo, The BQ25750 ICHG register can't be set to below 400mA. Would it be possible to write EN_CHG=0 to get the 0mA charge current needed? You can also leave the ICHG pin disconnected. This will not let the BQ25750EVM charge until EN_ICHG_PIN=0…
