Regarding the schematic and pin functionality of the 'MC33PT2000' chip.

Doublemint — Fri, 12 Jan 2024 18:05:18 GMT

Dear NXP engineer,

I have several inquiries regarding the operation of a specific component in my project.

1.From the MC33PT2000 datasheet, as indicated in the previous inquiry and referring to the diagram below:

Referring to a previous inquiry, for a 24V system, the datasheet advises setting the VCCP pin register to '1,' i.e., vccp_ext_en='1.' However, it mentions a side effect: "But for 24 V system operation, the internal VCCP linear regulator dissipates too much power."

Therefore, I am considering applying an external 7V voltage to this pin. However, the provided text does not describe the method for connecting the +7V voltage. Is the connection method I am using in Cadence (for pin 48 VCCP) correct?

2.In the 'KTPT2000FRDM3CUG' file, a partial schematic of the chip is shown, but I am curious about the resistor labeled 'SH' next to the current sensing resistor.

The following sentence reads 'Zero ohm Cut Trace 0603 PADS; No Part to Order.' I find it challenging to understand, especially the meaning of 'cut trace.' Does this imply using a 0603 surface-mount zero-ohm resistor?

3.Concerning the functionality of OA_1 and OA_2 pins, despite repeated readings of the datasheet, I haven't fully comprehended their purpose. My understanding is that these two current detection pins continuously monitor circuit current, perform AD conversion, and transmit data to the MCU's ADC module. Hence, during testing, retrieving data from these pins should provide detailed waveform information of the electromagnetic valve without the necessity of an oscilloscope's current probe. Is my interpretation accurate?

Your guidance and insights on these matters would be greatly appreciated.

Respectfully, Doublemint

Re: Regarding the schematic and pin functionality of the 'MC33PT2000' chip.

guoweisun — Mon, 15 Jan 2024 03:10:00 GMT

1: Correct in your side.

2: These are convenient for disconnect debug if necessary.

3: you can read AN5203 Page5:3.5 Analog output (OAx)

Re: Regarding the schematic and pin functionality of the 'MC33PT2000' chip.

Doublemint — Mon, 15 Jan 2024 07:25:37 GMT

Thanks,I get it.

topic Re: Regarding the schematic and pin functionality of the 'MC33PT2000' chip. in Other NXP Products

Regarding the schematic and pin functionality of the 'MC33PT2000' chip.

Re: Regarding the schematic and pin functionality of the 'MC33PT2000' chip.

Re: Regarding the schematic and pin functionality of the 'MC33PT2000' chip.