We purchased DC2174A-A to evaluate LTC3882EUJ#PBF. I tried to configured the output voltage by installing the voltage divider resistor. But it seems the default value are still giving the output.
The LTC3882 on DC2174A-A has been programmed to "ignore resistor configuration pins" and therefore even you put resistors on VOUT_CFG pins the output voltage won't change. You can connect the board to LTpowerPlay through DC1613A dongle and change the setting to "respect resistor configuration pins" or just simply change the VOUT through LTpowerPlay.
There is statement in the manual of Demo board. "The DC2174A powers up to default settings and produces power based on configuration resistors or with its non-volatile memory without the need for any serial bus communication. This allows easy evaluation of the DC-DC converter."
What if we used the regulator on our actual product. It will work if the we use manual configuration via resistor instead of via LTpowerplay. Right?
The bit 6 of MFR_CONFIG_ALL_LTC3882 is set to 0 by default (meaning that the LTC3882 will respect the resistor configuration). So if you put a default LTC3882 on your product (or make sure bit 6 of MFR_CONFIG_ALL_LTC3882 is set to 0), yes you can use resistor configuration on VOUT_CFG pins to program the VOUT.
Retrieving data ...