RHFL7913A

Application information

11/19

6.1

Remote sensing operation

When load is physically far away from device output, the adjustable line can be set as a

kelvin sense line by implementing the divider resistor bridge as close as possible form

device, with a decoupling capacitor. The adjust pin kelvin sense line (to be not coupled with

power line) picks-up load voltage (load also locally decoupled with a capacitor). This layout

eliminates ohmic drop in load power wire. Similarly, by taking advantage of two separate

ground terminals: power ground pin shall be directly connected to load ground terminal

which is also the system ground, device signal ground shall be separately connected to load

ground terminal by another kelvin line: In this way, ground ohmic errors are minimized

because the only current flowing into device signal ground pin kelvin line is device Iq (a

matter of a few mA).