PCA9451A single phase config for buck1 & buck3

[danipower]

hi, i am using the NXP PCA9451A and i try to figure out how i can (and if it can done at all) to operate buck 3 as a standalone converter and not as part of the dual phase with buck 1.

buck 1 work great when i disconnect it for buck 3 (j36 on EVK) but buck 3 wont work (and i checked the remote sense config).

thanks.

[danipower2]

hi, (answering from my newer user) i did connected the R_SNSP3_CFG pin to BUCK3 output? By setting the J30 to 2-3 position. and also removed J36 that connect the converters but still there is no output voltage at BUCK3, only in BUCK1.

* input power is ok (3.3V)

*there is valid communication with the computer

* the rest of the converters work well

there is something i am missing?

[JozefKozon]

Hi Dan,

yes, the PCA9451A support BUCK1 and BUCK3 single-phase configuration. To avoid misunderstanding, please confirm, have you connected the R_SNSP3_CFG pin to BUCK3 output? By setting the J30 to 2-3 position. The remote sensing.

With Best Regards,

Jozef