TPS1211-Q1: V(SNS_SCP) V(SNS_WRN) Value Confirm

junsong gu

Prodigy 150 points

Part Number: TPS1211-Q1

Hi TI,

For TPS12110-Q1 how to confirm the value of V(SNS_SCP) and V(SNS_WRN) ? Is there any equation to calculate?

Junsong Gu

9 months ago

0 Rakesh 9 months ago

TI__Guru** 102761 points

Hi Junsong Gu,

Thanks for reaching out!

RSNS * IOC gives V(SNS_WRN)

RSNS * ISC gives V(SNS_SCP)

Best Regards,

Rakesh

0 junsong gu 9 months ago in reply to Rakesh

Prodigy 150 points

HI Rakesh,

Thanks for your reply, actually as the spec show it is the V(SNS_WRN) decide the Rsns, so I'm confused about V(SNS_WRN) and V(SNS_SCP), Which parameter give the value of V(SNS_WRN) and V(SNS_SCP)?

Junsong Gu

0 Rakesh 9 months ago in reply to junsong gu

TI__Guru** 102761 points

Hi Junsong Gu,

yes, V(SNS_WRN) decides the Rsns.

The user/designer has to select V(SNS_WRN). The recommended range of the overcurrent protection threshold voltage, V(SNS_WRN), extends from 10 mV to 200 mV. Values near the low threshold of 10 mV can be affected by the system noise. Values near the upper threshold of 200 mV can cause high power dissipation in the current sense resistor. To minimize both the concerns, 25 mV is selected as the overcurrent protection threshold voltage for the application example in the data sheet.

Best Regards,

Rakesh

0 junsong gu 9 months ago in reply to Rakesh

Prodigy 150 points

HI Rakesh,

As your reply, we can use 25mV to calculate Rsns for any application?

Junsong

0 Rakesh 9 months ago in reply to junsong gu

TI__Guru** 102761 points

yes.. 25mV is a good starting point for most of the applications.

0 junsong gu 9 months ago in reply to Rakesh

Prodigy 150 points

Got it, thank you!

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TPS1211-Q1: V(SNS_SCP) V(SNS_WRN) Value Confirm