GS-EVB-HB-66508B-RN Technical Manual
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GS-EVB-HB-66508B-RN Rev. 210118 © 2021 GaN Systems Inc.
www.gansystems.com 2
Please refer to the Evaluation Board/Kit Important Notice on page 26
Overview
The GS-EVB-HB-66508B-RN is a RTK226110DE0010BU RAA226110
https://www.renesas.com/products/raa226110
gate drive demo board following GS665XXX-EVBDB
daughter board style. This evaluation kit consists of two GaN Systems 650V GaN Enhancement-mode
HEMTs (E-HEMTs) and all necessary circuits including half bridge gate drivers, isolated power supplies
and optional heatsink to form a functional half bridge power stage. It allows users to easily evaluate the
GaN E-HEMT performance in any half bridge-based topology, either with the universal mother board
(P/N: GS665MB-EVB) or users’ own system design. The GS-EVB-HB-66508B-RN demo board provides 0V
turn-off voltage solution. 0V turn-off solution is normally used in low power application. 0V turn-off
solution is easy to implement as there is no need a negative power supply rail. And the reverse
conduction voltage drop of GaN is lower. For E-mode GaN device the Vgs threshold voltage is low (typ:
1.7V). 0V turn-off has the risk of false turn-on when the GaN device is in off state. Also, the switching-off
loss will be higher than negative turn-off voltage. The 0V turn-off solution is normally used in the low
power applications.
Features:
•
Serves as a reference design and evaluation tool as well as deployment-ready solution for easy in-
system evaluation.
•
Vertical mount style with height of 35mm, which fits in majority of 1U design and allows
evaluation of GaN E-HEMT in traditional through-hole type power supply board.
•
Current shunt position for switching characterization testing
•
Universal form factor and footprint for all products
•
0V turn off voltage
The daughter board and universal mother board ordering part numbers are below:
Table 1 Ordering part numbers
Part Number
GaN E-HEMT P/N:
Description
GS-EVB-HB-66508B-RN
GS66508B
GaN E-HEMT 650V/30A, 50m
Ω
With
RAA226110 gate driver, 0V turn off voltage
GS665MB-EVB
Universal 650V Mother Board
Control and Power I/Os:
The daughter board GS-EVB-HB-66508B-RN circuit diagram is shown in Figure 1. The control logic
inputs on 2x3 pin header J1 are listed below:
