Gan Systems GS66504B-EVBDB GaN E-HEMT, User Manual

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GS66504B-EVBDB 650V
GaN E-HEMT Evaluation Board
User’s Guide
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GS66504B-EVBDB UG rev. 161120 © 2016 GaN Systems Inc. www.gansystems.com 2
Please refer to the Evaluation Board/Kit Important Notice on page 29
Overview
The GS665XXX-EVBDB daughter board style 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.
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
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
GS66502B-EVBDB GS66502B GaN E-HEMT 650V/7.5A, 200m
Ω
GS66504B-EVBDB GS66504B GaN E-HEMT 650V/15A, 100m
Ω
GS66508B-EVBDB GS66508B GaN E-HEMT 650V/30A, 50m Ω
GS66508T-EVBDB GS66508T GaN E-HEMT top side cooled 650V/30A, 50m Ω
GS66516T-EVBDB GS66516T GaN E-HEMT top side cooled 650V/60A, 25m Ω
GS665MB-EVB Universal 650V Mother Board
Control and Power I/Os:
The daughter board GS665XXX-EVBDB circuit diagram is shown in Figure 1. The control logic inputs on
2x3 pin header J1 are listed below:
Table 2 Control pins
Pin Descriptipon
ENA Enable input. It is internally pulled up to VCC, a low logic disables all the PWM gate
drive outputs.
VCC +5V auxillary power supply input for logic circuit and gate driver. On the daughter
board there are 2 isolated 5V to 9V DC/DC power supplies for top and bottom switches.
VDRV Optional 9V gate drive power input. This pin allows users to supply separate gate drive
power supply. By default VDRV is connected to VCC on the daughter board via a 0 ohm
jumper FB1. If bootstrap mode is used for high side gate drive, connect VDRV to 9V
PWMH High side PWM logic input for top switch Q1. It is compatible wth 3.3V and 5V
PWML
Low side PWM logic input for bottom switch Q2. It is compatible wth 3.3V and 5V
0V Logic inputs and gate drive power supply ground return.