PWR Monitoring , today i thought its gonna be a fast finish but it totally wasnt .. i started chossing a current meter ic and there were many options eg. : hall effect but this isnt suitable for such a pcb , the routing and interference relally is not needet here , i originally planned to pick an current ic (1 channel with shunt circuit and i2c) but then i thought i have for the fpga part 4 rails i want to watch withouth interfereing with them , but the problem is that shunts at eg 1v20a full load would take to much W for my application from the bus … so i need small shunt values but some are too small for the ic to read and depending on ic have bad resolution .. So i picked for the 1v20a (most crutial rail) a 2.5mohm and for the rest a 5 ohm resistor .. Back to my solution , I went with a MICROCHIP PAC1934T-I/JQ (cheap , high stock and good specs , also has 4 channels wich is perfect !) , i hooked the circuit up after some datasheet and ref design reading and i am planning to maybe add another one to the board later for eg the usb of pcie pwr draw watching ! And also for the rockchip maybe but i will first have to check if the rockchips pmic already does it standalone ..
Comments 0
No comments yet. Be the first!
Sign in to join the conversation.