I'm trying to debug the DC512B (with the LTC4100).
I prepared the setup:
- Configured the board for a 3S with ILM 3A
- Connected the power supply to DCin with 16V and 3.2Amp.
- Connected a thermistor of 10k on the "T" plug and the battery between Bat and GND
At the beginning I also connected the SCL and SDA to the smart battery pin. I checked with the oscilloscope that the 0x12 commands (current and voltage) was available on the bus.
After turned on the power supply, the ACP led switched on and also the CHGEN.
But I can ear very clearly a switching noise coming from the board and I saw the power supply current demanding completely not constant.
In the second stage I unconnected the SDA and SCL and I tried a “dry run” also with a load of about 50 ohm connected, but the behaviour was the same. (I read that the charger can work also without configuration)
I think that there is something of wrong, but I cannot understand what it is.
I attach the screenshot form the oscilloscope, where you can see the voltage on the battery (blue), the yellow and purple are the two pins of the coil.
Thnaks for the support