Pins A and B input 24V voltage, chip pins will burn out,
What is the maximum voltage that A\B pin can input?
This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
The bus pins for this device can withstand up to +-70V applied to them with respect to device ground. If the device is driving the bus while such a short is applied, the short-circuit output current will be internally limited to avoid damaging the device. The device will remain operational as long as the bus conditions remain within the recommended range of +-25V. Once this range is exceeded, functionality during the fault cannot be guaranteed, but the device will not be damaged until the absolute maximum range is exceeded.
Have you experienced a damaged device due to a fault test? If so, I would be interested in learning more about your test setup to identify what might be causing this failure.
Similar situation happened in my customer side. They add 24V in PIN A and found the part been damaged.
They tie RE and DE together and the MCU output high level to both of it. It means that this device is in driver mode.
I am intresting about how we limit the short circuit current when the tranciver operate as a driver.
The maximum voltage level we could handle during driver being short is +/-25V?
What's the data condition for this spec? (I suppose the maximum voltage spec is different when we are sending the data through D pin, and certain duty cycle will making the short current follow through different FET. But if we add constant level in D pin the short current will only follow through one internal FET)
The test conditions for the specification of this and other devices is outlined in this document. Section 2.2.5 details the short-circuit output current setup.
Could you share the test circuit your using?