I have the input being driven by a DC power supply, 3A capable no current limiting. It is set to 5.0V. I have a pair of Eaton 300F caps attached to the board, connected as required to Vout, Vmid, GND. The board is set for NORMAL, with Vclamp at 4.9V. The board jumpers are set for 2A output limit.
I begin by discharging the caps through a load until voltage is around 4V. I then enable the power supply, and as expected, current on the supply is indicating around 210mA, about 1/10th.
4.4V, current rises to 600mA
When it reaches 4.85V, it shuts off as expected. It sits around that for about 30 seconds, the power supply indicates it's consuming a bit of current, about 30mA. Then the cap voltage starts to bleed down until it reaches 4.78V, then it switches back on, goes to 4.85, then shuts off...this repeats over and over. It's like the 4425 sprung a leak and is bleeding off current.
Can someone explain why the part (board) is behaving in this bizarre manner?