topic Re: PT2001 Vboost shortcut questions in Powertrain and Electrification Analog Drivers

PT2001 Vboost shortcut questions

Fast — Thu, 09 Jan 2025 16:52:40 GMT

PT2001SWUG Rev 3.0 says "Note that in order to use the async or sync mode, the low-side use for DCDC has to be set as shortcut 2 (ex: dfsct undef ls7 undef). "

Yet no examples of firmware use that line of code. Is statement true, is it another hangover from PT2000?

Re: PT2001 Vboost shortcut questions

guoweisun — Mon, 13 Jan 2025 06:36:40 GMT

Hi Fast

Could you please give more explain about your issue/questions? That's difficult for understanding!

Re: PT2001 Vboost shortcut questions

Fast — Mon, 13 Jan 2025 11:02:14 GMT

Good morning guoweisun,

Please see the conversation with RafaR.

I am looking for guidance on DCDC code using the PWM mode ( AKA manual mode) , all microcode. That is not using the resonant mode since PT2001 cannot support on LS7 as no Vds sensing. I am led to believe that in PWM mode, and with Vboost capacitor grounded, so Vboost not effected by Iboost phase at injector which disturbs current control.

Re: PT2001 Vboost shortcut questions

guoweisun — Tue, 14 Jan 2025 01:54:38 GMT

Hi Fast

Since Rafael Rojas supported to you before please directly contact with him for continuous support.

Rafael is my colleague I think he will help you continuously.

Thanks!

Re: PT2001 Vboost shortcut questions

Fast — Tue, 14 Jan 2025 09:47:46 GMT

Yes close. Can you link these conversations. I do not want to "fall between two stools", I am surprised that this is a new question, considering the age of the MC33816. Please pick up the "baton", RafaR. Sorry for the English idioms.

Re: PT2001 Vboost shortcut questions

Fast — Fri, 17 Jan 2025 16:07:38 GMT

See Vboost using PWM (manual) NOT hysteretic. Set LS7 Slewrates to max, very clean waveforms at 100kHz