Is there voltage protection range information for S32G3-VNP-RDB3 and can that range be adjusted?

ohlongjohnson — Thu, 15 May 2025 15:32:57 GMT

Is there any information on the voltage protection range set for the S32G3-VNP-RDB3/GOLDBOX3 and if it can be adjusted? When trying to test using the device in a running vehicle I noticed that the voltage increase from starting the engine seemed to trigger an over-voltage cutoff on the board that caused it to shutoff until the car was turned off.

I tested the board on a bench top power supply with it starting at an output of 12 V and then gradually increased the output voltage by 0.1 V increments until the board shutoff at around 13.8 V. This seems a bit on the low end for starting a cutoff since generally a vehicles alternator will operate between ~13.5V and ~14.5V (15 V if its starting to go bad).

I couldn't find any exact documentation on the boards power protection and/or what might be enacting the cutoff at around this specific voltage.

I know that in the schematic the 12 V Input is feeding through some kind of protection circuit that prior to feeding into the VRR5510 PMIC. I think it might be operating as an over-voltage protection cutoff circuit, but I am not that familiar with them or how to determine a cutoff from this.

The VRR510 also according to its data sheet seems to have the ability to cut off power with its voltage supervisor in the event of under or over voltage according to section 22.6 of its data sheet.

I the VR5510 also looks configurable over I2C, but its not clear to me how it could be causing the shutoff if its whats causing it.

Any assistance and insight with this Is greatly appreciated it.

-Chris

Re: Is there voltage protection range information for S32G3-VNP-RDB3 and can that range be adjusted?

carlos_o — Thu, 15 May 2025 23:40:32 GMT

Hi @ohlongjohnson,

Thanks for your question, I'm working on it, I'll come ASAP with further information.

Re: Is there voltage protection range information for S32G3-VNP-RDB3 and can that range be adjusted?

carlos_o — Fri, 16 May 2025 20:44:05 GMT

Hi @ohlongjohnson

Apologies for the late reply.

The protection circuit of the S32G3 RDB3 board is mainly implemented to a bad connection of polarity and low voltage.

As you say, the chapter 22.6 Voltage supervisor of the datasheet of the PMIC specify in which situations the PMIC can cutoff. I suggest you review the AN13182, VR5510 Device Design Guidelines at the chapter 7 you could see how you can configure the PMIC.

S32GのトピックRe: Is there voltage protection range information for S32G3-VNP-RDB3 and can that range be adjusted?

Is there voltage protection range information for S32G3-VNP-RDB3 and can that range be adjusted?

Re: Is there voltage protection range information for S32G3-VNP-RDB3 and can that range be adjusted?

Re: Is there voltage protection range information for S32G3-VNP-RDB3 and can that range be adjusted?