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Original question:

AWR1642: Can I change the voltage of LP 87524 using mmWavwSDK

IWR1443: Can I change the voltage of LP 87524B using mmWavwSDK to meet the voltage requirements for 1443 without LDO.

Hui Chen
Intellectual 430 points
Part Number: IWR1443

Hi  TI experts,

As there is a mistake for BOM, we got some 1443 based RADAR board with LP87524B power solution without LDO, i.e,  1.8V and 2.3V are powered to 1.0V and 1.8V power rails directly.

Although we kenw that is high risk for RADAR SoC, it woks "properly" now, just lost some detection range.    

Can I change the voltage of LP 87524B using mmWavwSDK to meet the voltage requirements for 1443 without LDO. 

There is an IIC interface connected between IWR1443 and LP87524B on our board, therefore, theoretically, there should be a way to change the output voltages of bulk2 and bulk3 of LP87524B, I wonder whether the SDK has support these operations and how to do it? 

Thanks very much!

Best Regards.

 

  • 0
    TI__Mastermind 31680 points

    Hello Hui, 

    Thankyou for reaching out on this concern. 

    We're looking into this and will get back to you within 24 hrs. 

    Hope that's okay. 

    Regards,

    Ishita

  • 0 in reply to Ishita Kochar
    TI__Mastermind 25805 points

    Hello Hui Chen,

        We strongly recommend to change the power management device from LP87524B to LP87524J to avoid any further damage to mmWave sensor as by default their voltage rails are not correct for the external LDO bypass option. 

    SDK provides the drivers for the I2C interface

    drivers/i2c/I2CSlave.h File Reference

    After the SDK installation you could refer to the below package for the I2C interface reference examples.

    C:\ti\mmwave_sdk_0x_0x_00_0x\packages\ti\drivers\i2c

    Thanks and regards,

    CHETHAN KUMAR Y.B.