Bidirectional DC-DC Converter Reference Design for 12-V/48-V Automotive Systems
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Key Document


The TIDA-01168 reference design is a four-phase, bidirectional DC-DC converter development platform for 12-V/48-V automotive systems. The system uses two LM5170-Q1 current controllers and a TMS320F28027F microcontroller (MCU) for the power stage control. LM5170-Q1 subsystems use average current feedback for current control whereas the C2000™ microcontroller provides voltage feedback.  Such a control scheme eliminates phase current balancing typical for multiphase converters. A system based on LM5170-Q1 allows a high level of integration, which reduces printed-circuit board (PCB) area, simplifies design, and speeds up development.

  • 12V input voltage range:  6V to 18V
  • 48V input voltage range:  24V to 54V
  • Reverse polarity, overcurrent overvoltage and overtemperature protection
  • Multiphase scalable option
  • Highly integrated solution using automotive qualified components

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Schematic/Block Diagram

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Design Files

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(Output Voltage 1)
(Output Voltage 2)
Vin (Min) (V)246
Vin (Max) (V)5418
Vout (Nom) (V)1248
Iout (Max) (A)16641
Output Power (W)19921968
Input TypeDCDC
TopologyBuck- SynchronousBoost- Synchronous

TI Devices (12)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM5010A-Q1  Automotive Grade 0 and 1, 6-75V Wide Vin, 1A Constant On-Time Non-Synchronous Buck Regulator  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
LM5060-Q1  Automotive 5.5-V to 65-V high side protection controller  Power switches  Sample & Buy View Design Kits & Evaluation Modules
LM5170-Q1  Multiphase Bidirectional Current Controller  Buck-boost & inverting regulators  Sample & Buy View Design Kits & Evaluation Modules
LP5912-Q1  Automotive 500-mA, low-noise, low-IQ, low-dropout voltage regulator with reverse current protection  Power management  Sample & Buy View Design Kits & Evaluation Modules
MC33063A-Q1  Automotive Catalog 1.5-A Peak Boost/Buck/Inverting Switching Regulator  Step-up (boost) regulators  Sample & Buy Not Available
SN74LVC2G17-Q1  Automotive Catalog Dual Schmitt-Trigger Buffer  Buffer/driver  Sample & Buy View Design Kits & Evaluation Modules
TL431-Q1  Automotive adjustable precision shunt regulator (pin layout: KRA)  Voltage references  Sample & Buy Not Available
TLC2272A-Q1  Automotive Catalog Advanced LinCMOS™ Rail-to-Rail Operational Amplifiers  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
TMP102-Q1  Automotive ±2°C 1.4V to 3.6V digital temperature sensor with I2C/SMBus in 2.56mm2 package   Temperature sensors  Sample & Buy View Design Kits & Evaluation Modules
TMS320F28027F  C2000™ 32-bit MCU with 60 MHz, 64 KB Flash, InstaSPIN-FOC  Microcontrollers (MCU)  Sample & Buy View Design Kits & Evaluation Modules
TPS3306-Q1  Automotive dual-processor supervisors with power-fail  Power management  Sample & Buy Not Available
TPS560200-Q1  4.5V to 17V Input, 500mA Synchronous Step-Down Converter with Advanced Eco-Mode™  Step-down (buck) regulators  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM5010A-Q1 Download Download
LM5060-Q1 Download Download
LM5170-Q1 Download Download
LP5912-Q1 Download Download
MC33063A-Q1 Download Download
SN74LVC2G17-Q1 Download Download
TL431-Q1 Download
TLC2272A-Q1 Download -
Download Download
TMP102-Q1 Download Download
TMS320F28027F Download Download
TPS3306-Q1 Download Download
TPS560200-Q1 Download

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Technical documentation

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Datasheet (1)
Title Type Size (KB) Date
PDF 4686 10 Jun 2020
User guide (2)
Title Type Size (KB) Date
PDF 13507 12 Mar 2018
PDF 6692 05 Dec 2016
Design files (9)
Title Type Size (KB) Date
PDF 42 28 Jun 2017
ZIP 34 28 Jun 2017
ZIP 25 28 Jun 2017
ZIP 642 28 Jun 2017
ZIP 4016 28 Jun 2017
PDF 4091 28 Jun 2017
PDF 787 28 Jun 2017
PDF 51 28 Jun 2017
PDF 1090 28 Jun 2017
Related Tools & Software

Hardware development (1)

Name Part Number Tool Type
LM5170 48V-12V Bidirectional Converter Evaluation Module  LM5170EVM-BIDIR  Evaluation board 

Software development (1)

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