Hi,
I'm using a TPS65185 chip to power up a E-ink screen (ED060) and I am having some issue powering up the EPDC. The device is set to ACTIVE through I2C communication.
With the screen unplugged, the power rails are in regulation.
(VN in Yellow - VNeg in Blue)
Otherwise, once the display is plugged into the connector, the PMIC doesn't power up and the interrupt register shows a VNeg under voltage error, and the Power Good register shows 0xA0 (when 0xFA without the display).
(VN in Yellow - VNeg in Blue)
I tried to increase the delay between the ramp up of the rail, without success. The only load on the rail is the EPDC (so I don't think the current exceed the capacity).
I tried different displays, and I experienced the same issue. Any idea of what could cause this problem?
Best,
Vincent