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LP87524-Q1: LP87524-Q1

Rogers Chen
Intellectual 825 points
Part Number: LP87524-Q1

Hi,

My customer decided to use LP87524-Q1 for their new product, but he has a question about this chip. There are 4 power output channels of LP87524-Q1, but why there are only three EN pins? And how to control 4 converters independently by 3 enabe pins? Thanks!

  • 0
    TI__Genius 11020 points

    Hello Roger,

    EN pins are multiplexed as GPIOs and depending on programming they can be used for controlling bucks, or they can be GPIO outputs/inputs. Sequencing and control is programmed to the device registers. In most cases EN1 is used for initiating the sequencing for all bucks startup/shutdown and you can configure the delays in the registers. See more details on the app note: https://www.ti.com/lit/ug/snvu596/snvu596.pdf. Note customer can only change the registers which are volatile memory and the settings would be lost on power down. 

    Thanks.

    Regards,

    Tomi Koskela