Power ManagementのトピックCurrent measurement

Current measurement

Gad_usr1 — Wed, 26 Jun 2024 12:12:24 GMT

Hi, how can we measure current of battery pack using RD33771CDSTEVB and BATT14C emulator. Where should we connect the shunt resistor and in which channel in BATT 14c emulator is the current measurement done. Kindly clarify.

Re: Current measurement

ErikaC — Thu, 27 Jun 2024 16:53:06 GMT

Hello,

For this RD33771CDSTEVB,the shunt current detection pins are connected with ground.

So, I think you can refer to FRDM33771CSPEVB

Regards.

Re: Current measurement

Gad_usr1 — Fri, 28 Jun 2024 03:56:06 GMT

We are using this along with MPC5775B-EVB as part of the MPC5775B and MC33771 high-voltage BMS Evaluation System. MPC57775B-EVB supports only TPL. Is there any other board of MC33771C which has TPL and current sensing both enabled. I believe FRDM33771CSPEVB supports only SPI.

Re: Current measurement

ErikaC — Mon, 01 Jul 2024 15:40:48 GMT

Hello

So for your desired two function I think you can refer to EVB -RD33771-48VEVM.

RD33771-48VEVM Reference Design | NXP Semiconductors

Re: Current measurement

Gad_usr1 — Tue, 02 Jul 2024 04:08:17 GMT

Thank you. Is there any limit on the current sense for this board? For example can it support a battery pack of 48V, 200Ah