480-W, 97% η efficiency, Ultra-Compact (480W/in3), Bi-Directional DC-DC Reference Design


Design files


The TIDA-00705 is an ultra-compact (1”x1”x1”) high efficiency bi-directional DC-DC power converter capable of delivering 480W for use in Local Energy Storage (LES) and Battery Back-up power applications, specifically designed for server PSUs embedded with battery backup units (BBU). The reference design is based on a 2 phase interleaved half-bridge power stage controlled using the UCD3138 digital power controller.The design has built-in Protection for DC-bus Over-current, Over-voltage & Battery Over Current, Overvoltage and has phase current balancing to distribute the heat.

  • High efficiency of 97% as backup power supply, optimizes thermal management and extends battery backup time
  • Ultra-compact unit with heatsink built-in (1”x1”x1”) and effective thermal management makes it a retrofit into existing server PSUs 
  • Delivers high power output 40A/12V as back-up supply and charges battery at 6A during normal operation
  • Built-in battery charging CC-CV algorithm compatible for Li-ion and Li-Poly batteries
  • Delivers continuous power output of >300W at minimal airflow of 200LFM and 190W without any airflow
  • UCD3138A digital power supply controller solution enables programmability and configurability for different voltages and currents
Output voltage options TIDA-00705.1
Vin (Min) (V) 10
Vin (Max) (V) 16
Vout (Nom) (V) 12
Iout (Max) (A) 40
Output Power (W) 480
Isolated/Non-Isolated Isolated
Input Type DC
Topology Boost- Multiphase
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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.


Reference design overview and verified performance test data


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

TIDRNZ4.ZIP (7080 K)

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

TIDCCQ7.ZIP (1106 K)

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


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
* Design guide 480-W, 97% η, Ultra-Compact (480 W/in³), Bidirectional DCDC Reference Design (Rev. A) Mar. 02, 2017
Technical article The power to innovate industrial design Mar. 27, 2017

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