PMP21440

Comparison: 0.8V/8W GaN vs Silicon Power Supply Reference Design

PMP21440

Design files

Overview

This reference design provides customers with a comparison study on the usage of GaN vs SI in power supply designs. This specific design uses TPS40400 controller to drive CSD87381 for the silicon power supply and LMG1210 with EPC2111 for the GaN power supply to provide 0.8V/10A. This design compares the silicon and GaN power stages and illustrates the design tradeoffs and necessary optimizations when designing with GaN.

Features
  • PMBus programmable OPC, UVLO, OV, switching frequency, and soft start
  • Deadtime adjustment through pin strapping on LMG1210
  • Power board and daughter card impelemtatation
  • Optimizing deadtime showed 5% increase in GaN efficiency
Output voltage options PMP21440.1 PMP21440.2
Vin (Min) (V) 6 6
Vin (Max) (V) 8.4 8.4
Vout (Nom) (V) .8 .8
Iout (Max) (A) 10 10
Output Power (W) 8 8
Isolated/Non-Isolated Non-Isolated Non-Isolated
Input Type DC DC
Topology Buck- Synchronous Buck- Synchronous

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDT008.PDF (1272 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDRWF3.PDF (104 K)

Detailed schematic diagram for design layout and components

TIDRWF4.PDF (133 K)

Detailed schematic diagram for design layout and components

TIDRWF5.PDF (106 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRWF6.PDF (107 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRWF8.PDF (76 K)

Detailed overview of design layout for component placement

TIDRWF9.PDF (109 K)

Detailed overview of design layout for component placement

TIDRWG1.ZIP (1773 K)

Files used for 3D models or 2D drawings of IC components

TIDCEP8.ZIP (5705 K)

Design file that contains information on physical board layer of design PCB

TIDRWG0.ZIP (699 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Buck controllers (external switch)

TPS404003-V to 20-V, 30-A, synchronous buck controller with PMBus™, including Telemetry

Data sheet document-pdfAcrobat PDF open-in-new HTML
Half-bridge drivers

LMG12101.5-A, 3-A, 200-V half bridge gate driver, 5-V UVLO and programmable dead-time for GaNFET and MOSFET

Data sheet document-pdfAcrobat PDF open-in-new HTML
Power blocks

CSD87381P30-V, N channel synchronous buck NexFET™ power MOSFET, 3 mm x 2.5 mm LGA, 15 A

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Test report PMP21440 Test Results May 23, 2018

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