Gan Systems GS-EVB-HB-0650603B-HD Manuel technique - Page 10

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An inductor is placed in parallel with the high side switch. The goal of this inductor is to establish the test

level current in the low side switch at the end of the first on pulse (1). The magnitude of the test level

current at the end of period 1 is given by:

During period 2, the inductor current will naturally decay. The duration of period 2 should not be too long

that inductor current deviates significantly from the desired test level.

During period 3, the inductor current will again rise. Period 3 should not be so long that the inductor

current rises to an excessive level.

The falling edge of pulse 1 is used to examine the hard turn off characteristics of the switch. The rising

edge of pulse 3 is used to examine the hard turn on characteristics of the switch. By only applying these

two pulses, the switches are only on for a very short time and should not overheat.

3.2 Components Specification

Drivers:

Inductor:

GS-EVB-HB-0650603B-HD TM Rev. 210712

Test level

current

Figure 8: Double Pulse Test Waveforms

COMPONENTS

Heyday HEY1011-L12C

49uH 360mΩ Air Core

10

1

Please refer to the Evaluation Board/Kit Important Notice on page # 16

GS-EVB-HB-0650603B-HD

Half Bridge Bipolar Drive Switch Board

Hard switching edges

Technical Manual