Texas Instruments Incorporated
LOW COST METHOD-B HIGH VOLTAGE ISOLATION SCREEN TEST

Abstract:

A method includes applying an AC test voltage signal to a terminal of an electronic device, the AC test voltage signal having a test frequency of 100 Hz or more, sensing a current signal of the electronic device during application of the AC test voltage signal, and identifying the electronic device as passing an isolation test in response to the current signal being less than a current threshold. After identifying the electronic device as passing the isolation test, the method includes applying a second AC test voltage signal to the terminal of the electronic device, the second AC test voltage signal having a second test frequency of 100 Hz or more, measuring a partial discharge of the electronic device during application of the second AC test voltage signal, and identifying the electronic device as passing a partial discharge test in response to the partial discharge being less than a threshold.