GaN Systems GS-EVM-AUD-AMPOL1-GS Open Loop Digital Class-D Amplifier Module Instruction Manual
- June 3, 2024
- GaN Systems
Table of Contents
- GS-EVM-AUD-AMPOL1-GS Open Loop Digital Class-D Amplifier Module
- GS-EVM-AUD-AMPOL1-GS Description
- Technical Specifications of GS-EVM-AUD-AMPOL1-GS
- PCB Layout and Module Connections
- Compatible SMPS: GS-EVB-AUD-SMPS2-GS
- Ordering Information
- References
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
GS-EVM-AUD-AMPOL1-GS
Open Loop Digital Class-D Amplifier Module
50W per Channel x 4 into 8Ω
Technical Manual
Visit www.gansystems.com for the latest
version of this technical manual.
GS-EVM-AUD-AMPOL1-GS Open Loop Digital Class-D Amplifier Module
DANGER
DO NOT TOUCH THE BOARD WHEN IT IS ENERGIZED AND ALLOW ALL COMPONENTS TO
DISCHARGE COMPLETELY PRIOR HANDLING THE BOARD.
HIGH VOLTAGE CAN BE EXPOSED ON THE BOARD WHEN IT IS CONNECTED TO POWER SOURCE.
EVEN BRIEF CONTACT DURING OPERATION MAY RESULT IN SEVERE INJURY OR DEATH.
Please sure that appropriate safety procedures are followed. This evaluation
kit is designed for engineering evaluation in a controlled lab environment and
should be handled by qualified personnel ONLY. Never leave the board operating
unattended.
WARNING
Some components can be hot during and after operation. There is NO built-in
electrical or thermal protection on this evaluation kit. The operating
voltage, current, and component temperature should be monitored closely during
operation to prevent device damage.
CAUTION
This product contains parts that are susceptible to damage by electrostatic
discharge (ESD). Always follow ESD prevention procedures when handling the
product.
GS-EVM-AUD-AMPOL1-GS Description
1.1 Introduction
This technical manual highlights the features and benefits of a turnkey open
loop Digital Class-D Amplifier Module GS-EVM-AUD-AMPOL1-GS. This self-
contained 200 watt-per-channel Class-D amplifier module reference design is
for manufacturers of powered loudspeakers and stand-alone stereo and multi-
channel amplifiers. GaN Systems GS-EVM-AUD-AMPOL1-GS is developed around the
enhancement mode GaN-on-silicon power transistors and the next-generation
driver technology. These two next-generation technologies are combined with
highest quality output filters for best audio quality and sound. GS-EVM-AUD-
AMPOL1-GS is designed as two independent half- bridge outputs, for use in both
stereo and single-channel applications. The GaN open loop approach provides an
ideal switching form for Class D amplifiers. The high performance of switching
signals delivers a dual feedback loop that provides better performance than a
single loop / closed filter. The Module includes a fully programmable DSP with
Open-Loop output stage topology and is designed with best-practices EMI
considerations, and for compliance with FCC, UL, CSA, and CE requirements.
1.2 Purpose
The purpose of this evaluation module is to provide a complete comprehensive
GaN highperformance Class-D Amplifier solution with high efficiency, reduced
heat, reduced system size and weight due to the absence of heat sink, graceful
protection, auto recovery, and easy integration with switched-mode power
supplies solution. This comprehensive solution from GaN Systems, along with
other GaN Systems released Audio reference designs, enables audio systems
designers across markets to mix and match designs and maximize performance for
their specific industries.
1.3 Features
- Complete Stand-alone Class-D Audio Amplifier Module
- 50W / Channel x 4 Half-Bridge ground referenced output topology into 8Ω
- 200W / Channel x 2 BTL “Bridge-Tied Load” ground referenced output topology into 8Ω
- Digital integrated I 2 S “Inter-IC Sound” Audio Input
- Digital integrated S/PDIF “Sony/Philips Digital Interconnect Format” Coaxial Audio Input
- Frequency response of +/- 0.2dB (8Ω, 20Hz to 20KHz)
- +/- 32VDC Power Supply requirement
- Fully programmable and integrated DSP solution with DAE-3HT
- SNR “Signal to Noise Ratio” & DR “Dynamic Range” higher than 114dB
- THD+N “THD + Noise” less than 0.01% at (8Ω, 1W, 20Hz to 20KHz)
- No heat sink required
- Efficiency higher than 96%
- Complete integrated non-intrusive short circuit protection, thermal protection, and Over-Current protection
- Complete integrated non-intrusive Over-Voltage and Under-Voltage protection
- Guarded handling of complex and low impedance loads
- Compatible with GaN Systems SMPS GS-EVB-AUD-SMPS2-GS
- Output stages with 100V Enhancement Mode GaN Transistors GS61008P
1.4 Benefits
- High-performance Class-D Audio Amplifier reference design
- Enables smaller and more efficient Class-D audio systems
- Superior sounding and very high audio quality
- Closest audio signal to the sound source
- Reduction in system size and weight
- Reduction in heat flow
- Safe and stable design with graceful protection features against harmful failures
- Reliable design with Auto recovery features
- Optimization for cost
- Easy attachment to Chassis with 8mm stand-offs and mounting screws
- Compatible with GaN Systems complete LLC design + PFC SMPS that provides 20% volume shrink and 5% BoM cost reduction.
- The properties of GaN allow for high current, high voltage breakdown and high switching frequency. GaNPX small packaging of GS61008P enables low inductance & low thermal resistance and provides very high efficiency power switching.
Technical Specifications of GS-EVM-AUD-AMPOL1-GS
2.1 Recommended Operating Conditions
| Parameter | Min. | Typ. | Max. | Unit | Notes |
|---|---|---|---|---|---|
| Power Supply Voltage | +/-20 | – | +1-32 | V | Undervoltage @+/-18V |
| Load Impedance | 2 | 8 | – | Ω | |
| Effective Power Supply Capacitance | 1000 | – | µ F | Per rail, per amp. module |
2.2 Absolute Maximum Ratings
| Parameter | Rating | Unit | Notes |
|---|---|---|---|
| Power Supply Voltage | +1-32 | V | Over-Voltage shut down |
| Peak Output Current | 16 | A | Max. Current limit @18A |
| Ambient Temperature | 25 | °C | Normal Operation Without Heat Sink |
| Heat Sink Temperature | 90 | °C | Heat Sink might be required |
PCB Layout and Module Connections
Compatible SMPS: GS-EVB-AUD-SMPS2-GS
4.1 Description
GaN Systems Switched-Mode Power Supply GS-EVB-AUD-SMPS2-GS evaluation board
GS-EVBAUD-SMPS2-GS Evaluation Board | GaN Systems is compatible with GaN
Systems Open Loop Digital Class-D Amplifier Module GS-EVM-AUD-AMPOL1-GS. This
SMPS provides the basis for a complete LLC Power Supply design, with Power
Factor Correction (PFC). Controlled by advanced digital control methods
coupled with 650V GaN enhancement mode E-HEMTs, the SMPS includes all required
components and subsystems for a complete and compliant high-voltage power
supply. Power can be easily scaled by redesigning the magnetic components and
providing proper heatsinking and thermal management.
4.2 Features and Benefits
- Universal AC line input voltage (85 V – 264 V)
- +/-32 VDC Regulated Output Voltage
- 400W Continuous Output Power
- More than 90% full load Efficiency
- Fan-less, self-powered (from AC Line Input) design with no external DC supplies required
- Minimal external components due to high level of integration with D2Audio Controller/DSP
- High efficiency across a wide load range is achieved using GaN Systems GaN E-HEMTs and advanced control techniques
- Easily scaled to higher power by redesigning magnetics, proper selection of GaN Systems GaN EHEMTS, and thermal management
- Next Generation GaN Systems E-HEMTS providing below system improvements
- 20% Volume Shrink
- 5% BoM cost reduction
Ordering Information
The ordering information are listed in Table 1 below:
Where to buy | GaN Systems
Table 1 P/N and Description
| PART NUMBER | DESCRIPTION |
|---|---|
| GS-EVM-AUD-AMPOL1-GS | Amplifier: 50W per Channel x 4 into 80, Turnkey Open |
Loop Digital Class-D Amplifier Module
GS-EVB-AUD-SMPS2-GS| Power Source: 400W LLC Switched Mode Power Supply w/PFC
GS61008P| 100V, 90A, GaN E-mode, GaNPX® package, Bottom-side cooled
GS-065-011-2-L| 650V, 11A, GaN E-mode, 8×8 PDFN, Bottom-side cooled
GS-065-030-2-L| 650V, 30A, GaN E-mode, 8×8 PDFN, Bottom-side cooled
Evaluation Board/Kit Important Notice
GaN Systems Inc. (GaN Systems) provide the enclosed product(s) under the
following AS IS conditions:
This evaluation board/kit being sold or provided by GaN Systems is intended
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
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Further, the user indemnifies GaN Systems from all claims arising from the
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is the user’s responsibility to take all appropriate precautions concerning
electrostatic discharge. No License is granted under any patent right or other
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Please read the Technical Manual and, specifically, the Warnings and
Restrictions notice in the Technical Manual before 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 GaN Systems’ Engineering Team.
GaN Systems Inc.
www.gansystems.com
Important Notice – Unless expressly approved in writing by an authorized
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GS-EVM-AUD-AMPOL1-GS TM Rev.221018
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