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LP8860-Q1: Rsense

tateo yamashiro
Guru 10890 points
Part Number: LP8860-Q1

Hi,

We got a questions from the customer about LP8860-Q1.
Could you help us?

[Question]
- They want to use 22mohm for Rsense. Are there any concerens about this usage?
- If 22mohm is ok, how much is the SW current limit at BOOST_IMAX_SEL=1000? Is it 6.82A?
- How much is the variation of the SW current limit?

Best Regards,
tateo

  • 0
    TI__Expert 4565 points
    Hi Yamashiro-san,

    Your calculation is correct. Boost current limit will be 6.82A with 22mohm resistor.
    And variation range we control is pretty wide though. min 3.6A and max 8A, but actual variation is within 10% from typ value.
    Hope this helps,