MCT8316Z-Q1: MCT8316Z ILIM SET

oben enes sucu

Part Number: MCT8316Z-Q1

Tool/software:

Hello Dear All,

I want to set up my ILIM limit to 3A, for this value how can I calculate my ILIM resistors? Is there any formula or resistor value?

I checked evm manual and datasheet but I did not see.

Best Regards

4 months ago

0 Venkatadri Shantaram84961 4 months ago

TI__Mastermind 22842 points

Hi,

You can use below formula

Input IOUTA+IOUTB+IOUTC to 3A and find the VMEAS required to achieve this.

Thanks and Best Regards

Venkatadri S

0 oben enes sucu 4 months ago in reply to Venkatadri Shantaram84961

Intellectual 295 points

Hello,

I confused about that formula, could you please calculate for me as 3A?

Regards

0 Sachin S 4 months ago in reply to oben enes sucu

TI__Expert 6011 points

Hi Oben,

V_AVDDis 3.3V, and you can take the sum of currents as 3A. So that gives us VMEAS = 1.75V - (3xGAIN/3).

So set the voltage on ILIM pin equal to VMEAS = (1.75 - GAIN), here GAIN is in V/A which you will set. For e.g if you are using the HW variant, the GAIN is constant at 0.15V/A which gives us VMEAS = (1.75 - 0.15) = 1.6V. So if you set 1.6V on ILIM pin, you will get a 3A limit.

Regards,

Sachin S

0 oben enes sucu 3 months ago in reply to Sachin S

Intellectual 295 points

I did it, but speed is so slow right now and when I put lot of load to motor is not going fault condiotion.

I want to make when motor is 3A load, mct will go fault or stop condiotion.

Regards

0 Venkatadri Shantaram84961 3 months ago in reply to oben enes sucu

TI__Mastermind 22842 points

Hi Oben,

For ILIMIT to 3A VLIM (VMEAS) should be set for 1.5V

CSA_GAIN should be 0.15V/A and in hardware configuration it is always 0.15V/A.

AVDD = 3.3V

Now calculate IOUT by re arranging the equation which will be 3A.

Thanks and Best Regards

Venkatadri S

0 Venkatadri Shantaram84961 2 months ago in reply to Venkatadri Shantaram84961

TI__Mastermind 22842 points

Hi Oben,

Did we clarify your question?

Thanks and Best Regards

Venkatadri S

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MCT8316Z-Q1: MCT8316Z ILIM SET