Gan Systems GS-EVB-DRG-100V7R-GS2 User manual

GS-EVB-DRG-100V7R-GS2
100 V Driver GaN Open Loop Buck/Boost
Evaluation Board Technical Manual
___________________________________________________________________________________________________________________
GS-EVB-DRG-100V7R-GS2 TM Rev. 201013 © 2020 GaN Systems Inc. www.gansystems.com 1
Please refer to the Evaluation Board/Kit Important Notice on page 10
GS-EVB-DRG-100V7R-GS2
100 V Driver GaN Open Loop Buck/Boost Evaluation Board
Technical Manual
Visit www.gansystems.com for the latest version of this technical manual.
WARNING:
PCB surface can become hot. Contact may cause burns. Do not touch!
CAUTION!
This product contains parts that are susceptible to damage by electrostatic discharge (ESD).
Always follow ESD prevention procedures when handling the product.

GS-EVB-DRG-100V7R-GS2
100 V Driver GaN Open Loop Buck/Boost
Evaluation Board Technical Manual
___________________________________________________________________________________________________________________
GS-EVB-DRG-100V7R-GS2 TM Rev. 201013 © 2020 GaN Systems Inc. www.gansystems.com 2
Please refer to the Evaluation Board/Kit Important Notice on page 10
Overview
GS-EVB-DRG-100V7R-GS2 Evaluation Board with 100V DrGaN SMT power stage provides a complete 48V
step down converter which can be used to evaluate efficiency & power density for use in applications such
as CPU/GPU/DDR, high-performance Class D audio systems, and forward converters, ZVS, and buck /
boost topologies. GS-EVB-DRG-100V7R-GS2 is intended and made available for testing and
evaluation purposes only.
Features
• Integrated board for easy evaluation of GS-EVM-DRG-100VR-GS2
• 100 V Driver GaN Open loop Buck/Boost Board
• 7mΩ Half-Bridge power stage
• Dual PWM DrGaN input
• Ultra-fast rise/fall time
• High power density at 1MHz+ fSW operation
• High efficiency for 48V board power
Applications
• 48 V Step Down Converters
• CPU/GPU/DDR
• High-performance Class D Audio systems
• Forward Converter, ZVS, Buck/Boost topologies
Contents and Requirements
Kit Contents
The GS-EVB-DRG-100V7R-GS2 includes the following hardware.
Table 1 GS-EVB-DRG-100V7R-GS2 Evaluation Kit Contents
Quantity
Description
1
GS-EVB-DRG-100V7R-GS2 100 V Open Loop Buck/Boost Evaluation Board with Driver GaN Power
Stage
Hardware Requirements
In order to evaluate the performance of the evaluation board, the following equipment is required:
• High speed digital oscilloscope
• DC load (power resistor or electrical load)
• 48V & 5V DC power supplies
• Signal generator for PWM input (0-5V)
• DC test leads

GS-EVB-DRG-100V7R-GS2
100 V Driver GaN Open Loop Buck/Boost
Evaluation Board Technical Manual
___________________________________________________________________________________________________________________
GS-EVB-DRG-100V7R-GS2 TM Rev. 201013 © 2020 GaN Systems Inc. www.gansystems.com 3
Please refer to the Evaluation Board/Kit Important Notice on page 10
Electrical Specifications
Table 2 Electrical Specifications
Block Diagram and schematics
Figure 1 DrGaN Module Block Diagram
LGH
UGL
U2
R1
R3
VCC
R2
R4
C2
C1
VCC
48V
VIN
VSW
PGND
UGH
VCC
PWM_L
DHL
LGL
GND
PHASE
BOOT
VCC
AGND
PWM_H
DLH
G
D
S
SS
SUB
U1
5V ~ 6V
12V
VOUT
G
D
S
SS
SUB
U3
BOOT
V
GS
CLAMP
Symbol
Parameter
Conditions
Min
Typ.
Max
V
IN
Input Voltage [V]
48
V
OUT
Output Voltage [V]
Duty Cycle=25%
12
I
OUT
Output current [A]
10
F
SW
Switching frequency [kHz]
300
500
1000
Efficiency [%]
F
SW
=500kHz
96.4

GS-EVB-DRG-100V7R-GS2
100 V Driver GaN Open Loop Buck/Boost
Evaluation Board Technical Manual
___________________________________________________________________________________________________________________
GS-EVB-DRG-100V7R-GS2 TM Rev. 201013 © 2020 GaN Systems Inc. www.gansystems.com 4
Please refer to the Evaluation Board/Kit Important Notice on page 10
Figure 2 Evaluation Board Schematics

GS-EVB-DRG-100V7R-GS2
100 V Driver GaN Open Loop Buck/Boost
Evaluation Board Technical Manual
___________________________________________________________________________________________________________________
GS-EVB-DRG-100V7R-GS2 TM Rev. 201013 © 2020 GaN Systems Inc. www.gansystems.com 5
Please refer to the Evaluation Board/Kit Important Notice on page 10
Quick Start Guide
Pin Description
Board Setup
Below is an example of board connection setup for 150W Open Loop Buck DC/DC Converter.
Figure 4 Board Connection for Open Loop Buck DC/DC Converter
Figure 3 Pinout definition

GS-EVB-DRG-100V7R-GS2
100 V Driver GaN Open Loop Buck/Boost
Evaluation Board Technical Manual
___________________________________________________________________________________________________________________
GS-EVB-DRG-100V7R-GS2 TM Rev. 201013 © 2020 GaN Systems Inc. www.gansystems.com 6
Please refer to the Evaluation Board/Kit Important Notice on page 10
Test Results
Figure 5 Efficiency (not including driver loss)
Figure 6 Switching Waveform: FSW = 1 MHz

GS-EVB-DRG-100V7R-GS2
100 V Driver GaN Open Loop Buck/Boost
Evaluation Board Technical Manual
___________________________________________________________________________________________________________________
GS-EVB-DRG-100V7R-GS2 TM Rev. 201013 © 2020 GaN Systems Inc. www.gansystems.com 7
Please refer to the Evaluation Board/Kit Important Notice on page 10
Bill of Materials (BOM)
Table 3 Bill of Materials

GS-EVB-DRG-100V7R-GS2
100 V Driver GaN Open Loop Buck/Boost
Evaluation Board Technical Manual
___________________________________________________________________________________________________________________
GS-EVB-DRG-100V7R-GS2 TM Rev. 201013 © 2020 GaN Systems Inc. www.gansystems.com 8
Please refer to the Evaluation Board/Kit Important Notice on page 10
PCB Layout
Figure 7 PCB Layout - Top Layer (L1)
Figure 8 PCB Layout - Mid Layer 1 (L2)

GS-EVB-DRG-100V7R-GS2
100 V Driver GaN Open Loop Buck/Boost
Evaluation Board Technical Manual
___________________________________________________________________________________________________________________
GS-EVB-DRG-100V7R-GS2 TM Rev. 201013 © 2020 GaN Systems Inc. www.gansystems.com 9
Please refer to the Evaluation Board/Kit Important Notice on page 10
Figure 9 PCB Layout - Mid Layer 2 (L3)
Figure 10 PCB Layout – Bottom Layer (L4)

GS-EVB-DRG-100V7R-GS2
100 V Driver GaN Open Loop Buck/Boost
Evaluation Board Technical Manual
___________________________________________________________________________________________________________________
GS-EVB-DRG-100V7R-GS2 TM Rev. 201013 © 2020 GaN Systems Inc. www.gansystems.com 10
Please refer to the Evaluation Board/Kit Important Notice on page 10
Evaluation Board/kit Important Notice
GaN Systems Inc. (GaN Systems) provides the enclosed product(s) under the following AS IS conditions:
This evaluation board/kit being sold or provided by GaN Systems is intended for use for ENGINEERING
DEVELOPMENT, DEMONSTRATION, and OR EVALUATION PURPOSES ONLY and is not considered by GaN
Systems to be a finished end-product fit for general consumer use. As such, the goods being sold or provided are
not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related protective
considerations, including but not limited to product safety and environmental measures typically found in end
products that incorporate such semiconductor components or circuit boards. This evaluation board/kit does not fall
within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances
(RoHS), recycling (WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives,
or other related regulations.
If this evaluation board/kit does not meet the specifications indicated in the Technical Manual, the board/kit may be
returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE
EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES,
EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL
BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user
indemnifies GaN Systems from all claims arising from the handling or use of the goods. Due to the open construction
of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic
discharge.
No License is granted under any patent right or other intellectual property right of GaN Systems whatsoever. GaN
Systems assumes no liability for applications assistance, customer product design, software performance, or
infringement of patents or any other intellectual property rights of any kind.
GaN Systems currently services a variety of customers for products around the world, and therefore this
transaction is not exclusive.
Please read the Technical Manual and, specifically, the Warnings and Restrictions notice in the Technical
Manual prior to handling the product. Persons handling the product(s) must have electronics training and
observe good engineering practice standards.
This notice contains important safety information about temperatures and voltages. For further safety concerns,
please contact a GaN Systems’ application engineer.

GS-EVB-DRG-100V7R-GS2
100 V Driver GaN Open Loop Buck/Boost
Evaluation Board Technical Manual
___________________________________________________________________________________________________________________
GS-EVB-DRG-100V7R-GS2 TM Rev. 201013 © 2020 GaN Systems Inc. www.gansystems.com 11
Please refer to the Evaluation Board/Kit Important Notice on page 10
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GaN Systems Inc.
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Ottawa, Ontario, Canada K2K 3G8
T [phone]
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GaN Systems Ltd., German Branch
Terminalstrasse Mitte 18,
85356 München, Germany
T [phone]
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Ann Arbor, MI. USA 48104
T [phone]
www.gansystems.com
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