Keysight Technologies B1505A User Manual page 232

Measurement Examples
Gate Charge Measurement
g. Save this setup to the preset group created in Step 1.
3. Create a test setup for high voltage gate charge measurement as follows.
a. Open the Qg (High Vds + JESD24-2) application test.
b. Set the InCaseOfError parameter to Continue to prevent an abort of the
automatic test execution when an error occurs on a device test. You can set
this in the Extended Setup dialog box opened by the Extended Setup ...
button.
c. Specify an approximate expected total gate charge value to the QgMaxXAxis
parameter and specify an expected threshold voltage to the VgsTh parameter.
d. Specify the Off voltage to the VdsOff parameter according to your switching
condition.
e. Specify the measurement range of the gate voltage using the VgsOff and
VgsOn parameters.
f. Save this setup to the preset group created in Step 1.
4. Create a test setup for extracting the high current and high voltage gate charge
characteristics from the above two characteristics results as follows.
a. Open the Qg (JESD24-2 High Id + JESD24-2 High Vds) application test.
b. Set the InCaseOfError parameter to Continue to prevent an abort of the
automatic test execution when an error occurs on a device test. You can set
this in the Extended Setup dialog box opened by the Extended Setup ...
button.
c. Specify an approximate expected total gate charge value to the QgMaxXAxis
parameter and specify an expected threshold voltage to the VgsTh parameter.
d. Save this setup to the preset group created in Step 1.
5. Build up a test sequence in the Quick Test mode.
Click the Quick Test tab on the main screen. The tab is in the leftmost column on
the screen.
The Quick Test screen lists the test setups created in steps 2 to 4.
If they are not listed according to the following order, change the order using the
Up/Down buttons.
a. Qg (High Id + JESD24-2)
b. Qg (High Vds + JESD24-2)
5-14 Keysight B1505A User's Guide, Edition 12