After multiple tries, and several EEPROM bricked !!!!
I find a process to program correctly the EEPROM, Connect the USB cable, Connect ground from my power supply to GND, Select the register i want to modify, plug the 20.6V on /CS pin then burn the EEPROM.
But i need to burn several TLI 4970 EEPROM, when programming next EEPROM, I burn the EEPROM, then I have "Communication LOST" and it damaged the EEPROM. I cannot program efficiently my 3 TLI4970 on my board without destroying at least one !
I noticed that the evaluation board have a heat increase after one programmation.
I will continue my research.
Can you please help me, to identify the problem or give me the suitable procedure. it is very important project