We are using a TPS65185 with a E-ink screen on a custom board and we are experiencing some issues with repetitive partial-refreshes. The black and the white are getting grey at each partial refresh.
We discovered that the fading occurs at the power-down of the TPS65185. We are partially refreshing the screen at least every seconds and currently, the active discharge is not implemented on our board. The discharge of the rail seems to be too slow for the refresh frequency (especially VCOM).
Is it a known issue, and can the active discharge fix it?
What power consumption increase should we expect by implementing the active discharge?
Since we are refreshing the screen every second, is it worth it to turn off the TPS65185, or should we just keep it active as long as we refreshing the screen often?