TPS25200: Current limit calculation

Satoshi

Guru 19645 points

Part Number: TPS25200

Question about calculation for current limit setting on TPS25200 datasheet Page-15.

For example; when RILIM set to 250kΩ, IOS_max will be about 450mA by equation (1).

But Figure-18 is found about 550mA.

Why above IOS_max difference?

Best regards,

Satoshi

over 6 years ago

0 Rakesh over 6 years ago

TI__Guru** 105561 points

Hi Satoshi-san,

I will reply you soon.

Best Regards,
Rakesh

0 Satoshi over 6 years ago in reply to Rakesh

Guru 19645 points

Rakesh-san

Thank you for reply,
I looking forward your update.

Best regards,
Satoshi

0 Rakesh over 6 years ago in reply to Satoshi

TI__Guru** 105561 points

Hi Satoshi-san,

Equation (1) is correct. Please use as per that equation.
Looks like Figure 18 is done with curve fitting for two values RILIM = 150 kΩ, RILIM = 1100 kΩ and hence the error. I will check what needs to be done and update datasheet accordingly.

Best Regards,
Rakesh

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TPS25200: Current limit calculation