Rev. 01/2021
19
Power on Self Test
Each time the driver is powered on, it performs a test of its internal safety features.
The MEN pin (pin 8, Master Enable) has to be HIGH, while the ENABLE pin
(pin 7) has to be LOW for the self test to work properly.
Changing either of the signals during the self test will result in a failure. The driver cannot be
enabled until a self test has been performed successfully. The PULSER_OK signal will be
pulled high when the test has been successful. (“PULSER” here stands for “diode driver)
The test will take less than 5 seconds, but can take up to 15 seconds due to internal time outs
if any failure is detected. The following diagram shows the individual tests and the
approximate time it will take:
