Guru
Joined: 12/11/2017
Location: United StatesPosts: 441
| Posted: 06:14am 25 Jun 2023 |
Except for the mosfet and bulk capacitor count that board is similar to what I am working on. I hope you also have the small board that gets soldered to the two oblong slots.
In the schematic, U1 and the two trimpots(R3,R4) are use for monitoring battery voltage. And if pin1 and pin2 of the 6-pin connector are connected together, Q1 and Q2 can control the turn on/off of relay K1. If K1 is energized, it applies 12vdc to the 5vdc regulator applying power to the EGS002 board.
R4 sets the battery low voltage cutoff and R3 sets the battery high voltage cutoff. So, if the battery voltage is higher than the low cutoff and lower than the high cutoff, K1 will be energized.
The lower U2 is for the overcurrent sensing(IFB). I don't know where the upper U2 is used, depends upon where R15 is connected.
I hope this helps.
Edited 2023-06-25 16:16 by tinyt