USER GUIDE
UG499: Si828x-AW-GDB Gate Driver Boards
Skyworks Solutions, Inc. • Phone [949] 231-3000 • [email protected] • www.skyworksinc.com
206359B • Skyworks Proprietary Information • Products and Product Information are Subject to Change without Notice
11
November 10, 2022
To set an appropriate overcurrent trip level, see the module data sheet for the ID vs. VDS output characteristic curves. For
example, the pulse-current rating of the CAB450M12XM3 is 900 A at TJ = 25 °C; it follows that an overcurrent trip point of
1000 A at 25 °C should be selected. The drain-to-source voltage at the 1000 A operating condition is approximately 3.0 V, as
seen on the ID vs. VDS curve. From that, the overcurrent trip voltage, VOC-Trip, should be approximately 3.0 V. This trip volt-
age can be used to calculate the required Zener voltage, VZ, with the equation above.
Note that the HS-Drain connector, JT2, cannot be left floating because the over-current fault will trip immediately when the
high-side gate is taken high. If bench testing of the gate driver is required without the XM3 module, one may short the HS-
Drain connection to the high-side source to prevent the overcurrent fault from tripping. The low-side exhibits the same
behavior, and one may short the high-side source (low-side drain) to the low-side source for bench testing. The Reset signal
must be activated to acknowledge the over-current fault condition so as to return the gate driver to normal operation.
7.5. Si828x-AW-GDB - XM3 Test Circuits
The Si828x-AW-GDB is designed to operate with Wolfspeed's XM3 Evaluation Tool and the XM3 Three-Phase Inverter Demon-
stration Platform. The Si828x-AW-GDB was tested extensively with the XM3 module on the Wolfspeed's XM3 Evaluation Tool
with excellent test results. The Si828x-AW-GDB fits directly to the gate driver slots of the XM3 Three Phase Demonstration
Platform. Below are the links to the documentation for test setup and test results.
Si828x-XM3 Test Report: AN1362
XM3 Evaluation Tool: KIT-CRD-CIL12N-XM3