MP2886A programming

[zesko]

Hi everyone,
I have a board with a dead pwm on mp2886a. I order the chip without thinking about programming, and now I just realize my mistake.

Someone know if it's 100% needed to program the chip ? And if so, how to program it ? I see some dedicated board and software but, software is a bit tricky to me, the bad part of the job...

p.s : with the dead pwm chip, the GPU work fine when I disconnect the shorted pwm (6), with the new chip Pgood is 0 and the gpu doesn't start, so I guess it need to be programmed, or it's fake chip..

p.s 2 : Sorry for my English, I do my best 😬

[truclacicr]

https://datasheet.chipset.com.tr/dat...mps/mp2886.pdf

The MP2886A provides an EEPROM to store custom configurations. A 4-digit part number suffix is assigned for each application. The default configuration for each 4-digit part can be pre-programmed at the MPS factory. The data can be programmed again using the STORE_USER_ALL (15h) command via the PMBus and requires 200ms for the data to be stored to the EEPROM. The EEPROM is read automatically during the power-on sequence or by the RESTORE_USER_ALL (16h) command via the PMBus and requires at least 300µs for data to be restored from the EEPROM.

If the data from the EEPROM is checked as invalid by the cyclic redundancy code (CRC) during the system initialization process, the system enters an EEPROM fault state without outputting power and waits for the error clear command. The configuration from the EEPROM is ignored. There are three ways to clear the EEPROM fault and start up again with the restored value from the EEPROM:

1. Clear the EEPROM fault via the PMBus command (FFh).

2. Clear the fault status via the PMBus command (03h).

3. Store the configuration into the EEPROM and restart.

[zesko]

Thanks, I will buy the programer 👍

[SMDFlea]

Thanks, I will buy the programer 👍

There`s some cheap programmers on aliexpress https://www.aliexpress.com/item/1005008165456707.html

[zesko]

yeah that's the one I find on Ali, thanks 🙏