we are getting a 5-10microSEC pulse on the output when we connect the load. The peak of the spike is 3-4 times what is expected by calculation. After the 5-10microSEC the INA199 opeartes as expected.
1) How can we avoid having this spike?
2) can we use the INA199 as a feedback to a current limit (PWM)?
Hi Zevi, Thank you for posting on the E2E Foruns. The INA199 requires a blanking time at startup. Our own tests have shown the device can peak for up to 30uS under some circumstances, when used as a low side sense. The peak is normally not directly related to the measured current, so you would not be able to calculate it. Can you elaborate more on current limit feedback required? Cycle by cycle or average? What would the required response time be? What is the PWM frequency?
Carlos S., TI Sensing Products, Applications Support
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