Other Parts Discussed in Thread: TDA4VH
Tool/software:
Hi all:
We encountered a situation where the PMIC suddenly powered off the TDA4VH power supply when TDA4VH was running TIDL. When running TIDL, the power supply current would increase significantly. After a few seconds, the PMIC powered off. It was not directly turned off but followed the power-off process of PDN. After the PMIC was powered off, reading the PMIC register again would return abnormal values. Even if we read the device address and version number, i.e. 0x1, 0x2, 0x3, it would return various abnormal values such as 000000/33333/0303030303. The OV&UV threshold of VCCA is ±10%. We have tested the UV&OV function of VCCA, and the fault will recur. So we don’t understand why the overvoltage of LDO2 will cause the state machine of the entire PMIC to have an error. Our current NVM version is 03.
This weekend, we located that the output of LDO2 exceeded the threshold of VMON. When the VMON function of LDO2 was turned off, the fault no longer occurred. LDO2 is a 3.3V bypass output. By reading the register, the value of VMON UV&OV of LDO2 is ±5%/50mV. I want to confirm whether the output of LDO2 is based on ±5% of 3.3V or 50mV. If it is 3.3V, a 50mv fluctuation should be normal. Secondly, I want to confirm which voltage reference this fluctuation is based on, AMXOUT?
Our power supply test does not seem to cover the operating conditions of TIDL. How does TI test the power supply of the development board? Can you provide us with some reference? Or is there any test software similar to FurMark, or test software developed by TI that can test the TDA4VH power supply status under full power consumption?
This is our PMIC version information, read from address 0x1。
Thanks
