50A, 0.05% Current Accuracy Power Reference Design for Battery Test Systems


Design files


This reference design introduces a large current, highly accurate and bi-directional power solution used in battery test systems (BTS). It includes a LM5170EVM-BIDIR and a signal control board. The LM5170EVM-BIDIR is an evaluation board  to showcase the high performance of the dual-channel bidirectional current controller LM5170-Q1. The signal control board is built with precision amplifiers, which operates with the LM5170EVM-BIDIR to further improve the current accuracy. Bench tests shows that the current accuracy is better than 0.05% full scale.

  • 50A bidirection current
  • Lower than 0.05% FS current accuracy
  • Diode emulation to prevent reverse current
  • Easy to increase the current capability
  • High efficiency and small ripple with multiphase interleave operation
Output voltage options PMP15038.1
Vin (Min) (V) 12
Vin (Max) (V) 15
Vout (Nom) (V) 4
Iout (Max) (A) 50
Output Power (W) 200
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Boost- Synchronous
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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.

TIDUE40.PDF (950 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


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


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.

Analog switches & muxes

SN74LV4053A5-V, 2:1 (SPDT), 3-channel analog switch

Data sheet: PDF
Buck-boost & inverting controllers (external switch)

LM5170-Q1Multiphase bidirectional current controller, AEC-Q100 qualified

Data sheet: PDF | HTML
Charge pumps (inductorless)

LM26641.8-V to 5.5-VIN switched capacitor voltage inverter

Data sheet: PDF | HTML
Instrumentation amplifiers

INA18836-V, Zero-Drift, Rail-to-Rail-Out Instrumentation Amplifier

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

UA78L100-mA 30-V linear voltage regulator

Data sheet: PDF | HTML
Precision op amps (Vos<1mV)

OP07CLow-offset voltage (0.25 mV) single operational amplifier

Data sheet: PDF | HTML

Technical documentation

= Top documentation selected by TI
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Type Title Date
* Test report PMP15038 Test Results Jan. 08, 2018
Technical article Achieving highly accurate full-scale charge and discharge current control for high-cell Li-ion battery-formation testing Aug. 13, 2018
Technical article TI empowers design engineers at APEC Feb. 16, 2018

Related design resources

Hardware development

LM5170EVM-BIDIR LM5170 48V-12V Bidirectional Converter Evaluation Module

Reference designs

PMP15043 6A, 0.05% Current Accuracy Power Solution for Battery Test Systems Reference Design TIDA-010086 Digital control cost-optimized 10-A battery formation and test reference design TIDA-01040 Battery Tester Reference Design for High Current Applications TIDA-01042 Modular battery tester reference design for 50-A, 100-A, and 200-A applications

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