We have MP6619 Eval board. However The voltage at Iset to GND measures about 0.8V no matter where the pot is set…shouldn’t it measure around 0.15V?? When we move the pot RV1, the Iset reading is not changing (stays around 0.8V)…any idea why? We are trying to set our current limit.
Noticed there is a different sgnd at pin 4 of CN1 (we connected to the large pin gnd instead). Are these GND, SGND and AGND tied together? Where? SGND shows being tied to agnd which goes nowhere on the eval schematic, yet the eval board just labls them as GND at all the wiring pins.
GND of R11, c8, C1, etc does not seem to tie to SGND anywhere. Why does the eval manual not mention sgnd?