spacewrench
Active member
I got bit-bang SMBus running on my Power Playground board: the Teensy read the monitoring chip and got a reasonable voltage reading back out. The board was designed to work up to about 30V, so I stacked a 6V battery on top of the 12V I was using and hooked it up. (My Teensy supply circuit, based on the MP2456 buck converter, is supposed to be good to 50V, and the Teensy was only drawing ~25mA, so I figured it ought to be good.)
Not good.
Quick smoke from the MP2456, and the Teensy won't run off USB power any more either.
I'm really not sure what would have changed from 12V to 18V...the chips that touch it (sensor, buck converter, gate drivers) are designed for it.
Kinda disappointing...especially since I don't have a reasonable rework station, so it'll be tough to get all the chips off the board and salvage the useable ones. Plus I'd like to know what went wrong, so I don't blow up the next one too.
[insert sad trombone here]
Not good.
Quick smoke from the MP2456, and the Teensy won't run off USB power any more either.
I'm really not sure what would have changed from 12V to 18V...the chips that touch it (sensor, buck converter, gate drivers) are designed for it.
Kinda disappointing...especially since I don't have a reasonable rework station, so it'll be tough to get all the chips off the board and salvage the useable ones. Plus I'd like to know what went wrong, so I don't blow up the next one too.
[insert sad trombone here]