LMG3410 Datasheet, PDF (9/33 Pages) Texas Instruments – 600-V 12-A Single Channel GaN Power Stage

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7 Parameter Measurement Information
LMG3410
SNOSD10A – APRIL 2016 – REVISED JUNE 2016
7.1 Switching Parameters
The circuit used to measure most switching parameters is shown in Figure 9. The top LMG3410 in this circuit is
used to recirculate the inductor current and functions in third-quadrant mode only. The bottom device is the
active device; it is turned on to increase the inductor current to the desired test current. The bottom device is
then turned off and on to create switching waveforms at a specific inductor current. Both the drain current (at the
source) and the drain-source voltage is measured. The specific timing measurement is shown in Figure 10.
LMG3410
FAULT
IN
500 µH
Id
LMG3410
FAULT
IN
VIN
Cpcb
+
VBUS
Vds
400 V
-
Copyright © 2016, Texas Instruments Incorporated
Figure 9. Circuit Used to Determine Switching Parameters
IN
50%
50%
tpd,on
tpd,off
ID
1A
tdelay,on
tr
80%
VDS
20%
tdelay,off
tf
80%
20%
Figure 10. Measurement to Determine Propagation Delays and Slew Rates
Copyright © 2016, Texas Instruments Incorporated
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