1kW, 800V to 12V serial half-bridge bidirectional DCX with GaN and C2000


Design files


This reference design is a 1kW bidirectional DC transformer (DCX), converting 800V DC bus into 12V with isolation. The design is controlled by F280039C and constantly operated at the resonant frequency of the resonant tank. The primary side uses LMG3622 GaN serial half bridge to handle up to 900V DC voltage. The serial half bridge (SHB) can be modified into full bridge and change the high-voltage side from 800V to 400V. The serial half bridge enables various PWM strategy and controls flexibility.

  • Natural bidirectional power flow
  • Uses 650V GaN to handle 800V DC
  • Active voltage balancing control
  • Higher than 98.0% efficiency
  • Small form factor, 50mm × 120mm × 35mm
  • Flexible input and PWM strategy
Output voltage options PMP41037.1
Vin (Min) (V) 760
Vin (Max) (V) 840
Vout (Nom) (V) 12
Iout (Max) (A) 84
Output Power (W) 1008
Isolated/Non-Isolated Isolated
Input Type DC
Topology Half Bridge- Resonant
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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.

TIDT332.PDF (1449 K)

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


Detailed schematic diagram for design layout and components


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


Detailed overview of design layout for component placement

TIDMCY5.ZIP (16259 K)

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

TIDCGP2.ZIP (2155 K)

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

TIDMCY4.ZIP (2880 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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Technical documentation

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Type Title Date
Test report 1kW, 800V to 12V Serial Half-Bridge Bidirectional DCX With GaN and C2000 PDF | HTML May 17, 2024

Related design resources

Hardware development

TMDSCNCD280039C TMS320F280039C evaluation module C2000™ MCU controlCARD™

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