Hi Sir:

1\ In ADP1051's datasheet, page 6, test condition for CS2 current measurement sense accuracy is "4.99 kΩ** (0.01%)** level shift resistors"; is that a typo? it's impossible to use 0.01% precision resistor in real application, right?

what's the accuracy for 0.1% resistor used;

2\ the CS2 current measurement sense accuracy for low side mode is +/-2.28mV(0.01% resistor); for 1mohm current sense resistor used in the ADP1051 reference design, how to guarantee the output current detected precision of less than +/-1A? 2.28mV/1mOhm=2.28A??

Hi Jun Yin,

Actually according to 0xFE65[1:0] an update rate of 10ms corresponds to 14 bits of accuracy. Higher values like 52ms and so on will be much higher in averaging accuracy. However, this is only for reporting the IOUT value using the PMBUS command READ_IOUT. The over current fault is selectable to 7 bits or 9 bits.

Lt Comm Data.