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INA230: INA230 Alert setting

Alan Chang
Intellectual 1960 points
Part Number: INA230

Hi there,

  I have questions about INA230 alert below;

1. from data sheet,  "If multiple alert functions are enabled, the selected function in the highest significant bit position takes priority and responds to the Alert Limit register value. For example, if the SOL and the SUL are both selected, the ALERT pin asserts when the Shunt Voltage Over Limit register exceeds the value in the Alert Limit register". Does it say only SOL will send alert? SUL will not trigger, even SUL is set at enable? Only 1 item can be monitored in case 2 or more items are set, right?

2.  In Alert register (07H), how do I set the threshold value? Does it support over current feature? example: bus over voltage, Vin = 12V normally, 13.2V is OVP target. 13.2V or 1.2V should be used in Alert register? And only 1 protection can be stored, right?  

  

  • 0
    TI__Mastermind 26660 points

    Hey Alan,

    For question 1, yes, the ALERT pin will only respond to one of the alert functions even if multiple alert function (SOL, SUL, BUL, etc.) are set in the Mask/Enable Register (06h).

    To set a threshold value for an alert function, you need to write the corresponding value into the Alert Limit Register (07h). So if BOL (bus over voltage) is set in Mask/Enable, then the threshold bus voltage needs to be written in register 07h. The value should be determined by using the bus voltage LSB. Keep in mind that the Alert Limit Register is compared to the corresponding measurement register to determine if the condition has been met.

    Hope this helps.

    Best,

    Peter