GS66508T-EVBHB 650V
GaN E-HEMT Half Bridge Evaluation Board
User’s Guide
_____________________________________________________________________________________________________________________
GS66508T-EVBHB UG rev. 150917
© 2015 GaN Systems Inc.
www.gansystems.com 11
Please refer to the Evaluation Board/Kit Important Notice on page 21
CAUTION:
Limit the maximum switching current to
30A
and ensure maximum
drain voltage including ringing is below
650V
for pulse testing.
Exceeding this limit may cause damage to the devices.
Buck/Standard half bridge mode
This is standard half bridge configuration that can
be used in following circuits :
•
Synchronous Buck DC/DC
•
Single phase half bridge inverter
•
ZVS LLC
•
Phase leg for full bridge DC/DC or
•
Phase leg for a 3-phase motor drive
Boost mode
When the output becomes the input and the load
is attached between VBUS+ and VBUS-, the board
is converted into a boost mode circuit and can be
used for:
•
Synchronous Boost DC/DC
•
Totem pole bridgeless PFC
Quick start procedure (pulse test mode)
1.
Equipment and components you will need to get started:
•
Four-channel oscilloscope with 500MHz bandwidth or higher
•
high bandwidth (500MHz or higher) passive probe
•
high bandwidth (500MHz) high voltage probe (>600V)
•
AC/DC current probe for inductor current measurement
•
12V DC power supply for board gate drive circuit
•
Signal generator capable of creating testing pulses
•
High voltage power supply (0-400VDC) with current limit.
•
HV Differential probe for high side measurement (optional)
•
External power inductor (recommend toroid inductor 50-200uH/40A)
1.
Check the board for any visual damage and ensure jumper
J3
is properly installed at “INT”
position.
D
S
D
S
CON3
Q1
GS66508T
CON1
G
Q2
GS66508T
VBUS-
CON4
G
C6-C10
CON2
L
OUT
400V DC
+
VBUS+
CON6
CON5
VSW
C
OUT
D
S
D
S
CON3
Q1
GS66508T
CON1
G
Q2
GS66508T
VBUS-
CON4
G
C6-C10
CON2
L
IN
+
VBUS+
CON6
CON5
VSW
VIN
INPUT
