I designed a board with 4 adm1276, all independant, except for the I2C link.
On the board :
3 ADM1276 are OK, One, I2C adresse "11", is always "ON", ENABLE pin has no effect. voltage level are OK. Enable PIn toggle with correct level.
plus, it is not responding on I2C, no ACK. the 3 others are reachable via I2C.
I have three PCB, 1 is OK , 2 have the same Problem. No Short Circuit, no missing voltage.
Any suggestions ?