Other Parts Discussed in Thread: LP5813
Tool/software:
Hi support team,
If the external capacitor connected to the C1+ and C2+ terminals is shorted,
the IC heats up but the LED remains lit.
I want to detect this from the MCU using I2C access, but even when I try to read register 0x83 GENERAL_FAULT with the C1+ and C2+ terminals shorted, it reads 0x00.
I tried changing the read timing, such as while the LED is dimming or after a switch reset, but I have not been able to successfully detect the error.
(For now, I can read 0x00 whenever I read it)
The settings related to the CP are as follows:
cp_mode: Auto
cp_return_1x: default
cp_dis_disch: default
Are there any register settings that need to be made to detect LED driver abnormalities?
There is no explanation for this register in the D/S, so I don't know how to use it.
Could you please let me know the specific steps for:
- Detecting abnormal IC heat generation
- Detecting CP errors caused by capacitor shorts, etc.
Here's the background.
In an open/short circuit test to verify the safety of our in-house products, we found that abnormal heat generation occurred when a capacitor connected to a CP was short-circuited.
We are currently investigating ways to detect this abnormality and shut down the IC.
(Even when shorted, some of the LEDs would light up and the IC would heat up.)
So, we thought it might be possible to detect this with the cp_cap_missing register, so we tried it, but there was no reaction, which is why we contacted you.
Regards,
Dice-K
