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When designing, the maximum attainable LED current is not internally limited because the LM3409/09HV is a controller. Instead it is a function of the system operating point, component choices, and switching frequency allowing the LM3409/09HV to easily…
Can you provide a register dump?
Do you have a system load? Do you see this issues without a system load?
What is the battery voltage and charge current?
Do you have a current limit on the input supply?
Hi Team,
I would like to add a little more information. The power supply settings are: voltage 23.5V, current limit 2.1A. The current is 2.1A when the host is charging. The test is as shown on the right, which meets the current limit requirements. The…
Is this for the gate driver? You can check the supply current whether its supply current exceeds HV start-up current out of VDD, the typical value is 250uA. The gate driver VCC sink current is too large to limit the VDD rising up.
You can refer to the…
Other Parts Discussed in Thread: BQ25672 请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。 https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1619950/bq25672-incorrect-charging-voltage-400mv-differenc…
Hi,
The board could hit input current limit. Could you try below register settings with input current limit/protection disabled?
* Created: Thu Jul 24 09:50:03 CDT 2025
*
* Format: Register Name tab Character,\t Hexadecimal register value.
* Device…
Does this happen on multiple boards or just this one? Are you able to measure 5V at VIN? Do you see any current flowing from your VIN supply? Is the supply current-limited?
When VSYS is 3.7V with a 3.7V battery connected to BAT, it indicates that the…
Other Parts Discussed in Thread: BQ40Z50 请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。 https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1607207/bq40z50-r2-bq40z50-max-charge-current-limit-and-max…
