Application Note
11
<Revision 1.2>
<2017-11-09>
Manual for HybridKIT Evaluation Gate Board
HybridKIT Evaluation Gate Driver Board for 750V EDT2 IGBT
Quickstart Guide
4.4.2
Switching the gate driver
After the DEBUG mode is activated (section 4.4.1) the gate driver is ready to be switched without SPI
communication.
Before switching the gate driver, it has to be enabled:
Connect 5V_DIG with EN (see Figure 7).
nFLTA LED ON (close to signal connector) will indicate the driver ready signal.
Now the gate can be controlled by the PWM signal:
Connect 5V_DIG with PWM_xx OR connect a 5V signal generator between GND_DIG and PWM_xx and
perform pulses (see Figure 7).
Short Circuit (desaturation) or IGBT open detection:
A IGBT desaturation (DESAT) event is indicated to the operator by turning off the corresponding nFLTA
LED (close to the signal connector). The gate driver is than looked and prevented from performing
output pulses. It can be reactivated by the following sequence:
Disconnect 5V_DIG from EN. Disabling the gate driver resets all error states.
Connect 5V_DIG with EN. Enabling the gate driver again.
The nFLTA LED will indicate driver again a ready signal.
Figure 7 The testpads GND_DIG, 5V_DIG, PWM_xx, EN can be used to perform simple output pulses. The
testpads on the right picture simplify the access to the testpads (only revision “Sense_V1.2” and later).
