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Combining Dual Half Bridge Outputs
Posted:
Thu Sep 05, 2019 11:13 pmby 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
Re: Combining Dual Half Bridge Outputs
Posted:
Fri Sep 06, 2019 8:59 amby 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.
Re: Combining Dual Half Bridge Outputs
Posted:
Fri Sep 06, 2019 11:28 amby 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?
Re: Combining Dual Half Bridge Outputs
Posted:
Fri Sep 06, 2019 12:17 pmby Stephen Dean
Hi,
For that current draw, you would need to have a separate DHB for each pump.
Re: Combining Dual Half Bridge Outputs
Posted:
Fri Sep 06, 2019 1:25 pmby 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
Re: Combining Dual Half Bridge Outputs
Posted:
Fri Sep 06, 2019 3:14 pmby 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.