Disable system power configuration on B5 SOM

[thrmttnw]

Also note that B5 modules are not configured to work on 2G out of the box. A painfull debug, with deliberately obfuscated data sheet schematics, and customer service unwilling to disclose what components are actually in the power rail on the module:

Default max current draw too low for 2G

After spending 4 weeks with support, this is listed here to help others. A device based on boron (B5) without a battery, frequently reset while on 2G (requires around 2A). This also failed on the SOM evaluation board. I may have previously had a similar baffling experience with a Boron 2G/3G. While the B5 data sheet mention that a 2A adapter is needed, it does not seem to mention that Gen 3 devices default come with a powerSourceMaxCurrent set to 950mA. So out of the box 2G is not supported wi…