Combining Dual Half Bridge Outputs

[HKS_TRD]

I need to PWM a fuel pump with a maximum current draw of 19A. Is it possible to connect both of the outputs of the Dual Half Bridge together to meet the current requirement

[Stephen Dean]

Hi,

I am presuming that you mean the DHB external controller? (P/N 41213)?

If so, then you can do this with these units, I would however recommend that the DHB is used to low side switch the pump, rather than high side.

[HKS_TRD]

Hi Stephen
That is the controller I am referring to.
I have two pumps and will be running each off a 20A output on my PDM30. If I use the DHB to low side switch the pump will I be able to use the 1 DHB to independently control each pump?

[Stephen Dean]

Hi,

For that current draw, you would need to have a separate DHB for each pump.

[HKS_TRD]

Thanks Stephen.
I do have an extra DHB which I hadn't allocated a use to yet, though I do need to PWM 2 MAC valves as well and the factory PPS solenoid in the steering rack

[Stephen Dean]

The ECU can drive the MAC Valves, they are low current draws.

The PPS Solenoid will most likely have a quite high current draw (60A+) and usually has a dedicated control circuit built in.