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rusefi / alphax-4chan

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Can High side Outputs drive VVT solenoids #173

Open ElDominio opened 8 months ago

ElDominio commented 8 months ago

Ask question states, can high side output drive a VVT solenoid that has one side wired to ground?

rusefillc commented 8 months ago

@ElDominio please provide context what pins are you asking about? ignition control pins I am sure are too weak

ElDominio commented 8 months ago

Internal High1 and High2, the ones on the molex microfit

rusefillc commented 8 months ago

@Qwerty-OFF needs your help

https://jlcpcb.com/partdetail/Pjsemi-PJM2319PSA%2FC411720#EC says 3A do we trust this 3A for PWM? is it just unprotected? Do we need to experiment?

Qwerty-OFF commented 8 months ago

Yes, we need an experiment. Perhaps long-term operation with a current of 3 Amps will cause significant heating. These outputs are unprotected. Flyback diodes are present, you can control the inductive load using PWM.

ElDominio commented 8 months ago

I don't think VVT solenoids ask for more than half an amp, so we should be fine?

rusefillc commented 8 months ago

we need an experiment

@ElDominio would you be able to make an experiment happen?

ElDominio commented 8 months ago

What is the experiment

rusefillc commented 8 months ago

@ElDominio please wire up a VVT solenoid on bench or real car and see what happens

ElDominio commented 6 months ago

This will be tested eventually

ElDominio commented 3 months ago

It may not be because #179 happened