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Original question:

BQ76952: Recovery from SCDL by Load detect

BQ76952: When does the Load detect start?

Sho Takayama
Intellectual 390 points
Part Number: BQ76952

Tool/software:

Hello.

Please teach me the Load detect.

I understand that the Load detection is enabled until Protection:Load Detect:Timeout or .
When does the Load detect start?

Is it when you turn on the power? Or when SCDL or OCDL protection occurs?

In the former case, should I send the LOAD_DETECT_RESTART() command when SCDL or OCDL protection occurs?

Thank you,

Takayama

  • +1
    TI__Expert 4320 points

    Hello Takayama,

    Load detect will start when a SCDL or OCDL fault occurs. When these faults trigger a current source will be enabled on the LD pin. This current source will be enabled for a time determined by Protections:Load Detect:Active Time. When Protections:Load Detect:Active Time has ended the device disables the current source and waits for a time determined by Protections:Load Detect:Retry Delay before re-enabling the current source. If the device is unable to detect the load has been removed before Protections:Load Detect:Timeout  the Load Detect functionality is disabled. You should send the LOAD_DETECT_RESTART() command after Protections:Load Detect:Timeout and the Load Detect functionality has been disabled. Sending the LOAD_DETECT_RESTART() command will restart the Load Detect sequence talked about previously.

    Best regards,

    Thomas Rainey

  • 0 in reply to Thomas Rainey
    Intellectual 390 points

    Hello,

    Thank you your reply.

    I understood as below.

    Because Load detect will start when SCDL or OCDL fault occurs, it will never be disable before SCDL or OCDL fault occers.