Page 11 2019-05-10
4. Why need to manage the end charge voltage
Disabling the charge current when it
’s closed to the fully charge voltage can prevent the battery cells from over
charge thus would be good for battery life time. That is the first reason. The second reason is that some audio
applications have sweet voltage, program the end charge voltage can make it falling into the sweet spot each time
when it
’s turned on. Please keep in mind that when the charger goes to standby mode, the displayed battery
voltage (discharge voltage at standby) could be lower than the end charge voltage. The difference could be around
0.1V up to how much the charging current it was.
5. How to move the OLED board to front panel
(1). Break the OLED board from the power supply main PCB.
(2). Mound the OLED board to the front panel.
(3). Connect the OLED board with the main PCB through the supplied 10 pin FFC cable from J9 to J14.
Please see the picture “Connection between main PCB and external OLED board” for the orientation of cable.
6. How to have on/off button and power LED at front panel without removing OLED board
Connect the front panel on/off button and the power LED indicator to connector J11 by a jumper wire cable.
7. How to use multiple power supplies to get more voltage rails or extend the voltage range
(1). Link the power supplies together through the supplied bridge cable. The cable will be connected from J16 of
the master power supply to the J15 of the slave power supply, and so on.
(2). It is recommended to use separate DC input for each power supply. However, you can also share one DC input
with all power supplies through input terminal J6, but have to make sure the DC adapter can deliver enough
current.
(3). Since all pure battery outputs are galvanic isolated, you can connect different voltage rails in serial to extend
the voltage range.
(4). Can also work with later on ultra capacitor power supply in the same way.
8. How to replace fuse
Voltage rail J1, J2, J3 and J4 equipped with fuses for over current protection. You need to confirm whether they are
blown if there is no output. To replace a fuse, you will need:
(1). Lift one of the fuse terminals up by a needle. And then pick up it by a tweezers.
(3). Plug a new fuse into the socket. The P/N of the fuse: 0451005. Manufacturer: Littelfuse.
9. How to configure six isolated/independent 3.3V rails
It is possible to have six isolated/independent 3.3V rails under the following configurations.
(1). Install battery cells or battery holders to BT7, BT2, BT9, BT6, BT5 and BT3 positions.
(2). Short TP11 and TP12, and then short TP5 and TP6 at back side of PCB
Under this configuration, six pure 3.3V battery rails can be used, which are
J1, J2, J3, J4 and
Additional 3.3V rail: TP1(+) to TP3(-)
The other additional 3.3V rail: TP7(+) to TP9(-)
The additional 3.3V rails can be picked up/connected from back side of PCB. If it is possible, include fuses in the
connections.
