I have a design with two UCD9248 devices, controlling in total eight rails. All the rails uses UCD7242 drivers, in either single or dual phase configuration. The design works fine, with the exeption of Iout and Temp readings. No Iout reading reports any value below ~1.4 A, regardless of how small the load actually is. The IMON pins are connected to a 10 kohms resistor to ground in parallel with a 10 nF capacitor.
The temperature readings are also off the scale if I use the datasheet values with a gain of 10 mV/C and an offset of 0.47 V. When I use a gain of 15 mV/C and an offset of 0.7 V, the readings becomes more realistic. The TMON pins are connected to a 10 nF capacitor to GND and then via a CD74HC4051 analog mux to the Temperature pin on the UCD9248. The Temperature pin on the UCD9248 also has a 100 pF capacitor to ground.
Thanks,
Lukas
