TIPD138

SPI programmable 16-bit, 36V, 1A Power Supply with Integrated Current Shunt

TIPD138

Design files

Overview

This Verified Design provides the theory, component selection, simulation, PCB design, and measurement details for a SPI controlled 36V power supply capable of sourcing 1A.  It also includes an intergrated high-side current shunt accurate to 1% across multiple decades of current load.  The output of the design is sourced by the DAC8871 which supports both unipolar and bipolar output ranges.  As a result, this circuit can be easily modified to meet the needs of many different applications. See more TI Precision Designs

Features
  • 36V @ 1A Load SPI Controlled Output
  • 0.08% Measured FSR Gain Error
  • 8.2mV Measured Offset Error
  • Current Monitor Output
  • Variable Decades of Current Measurement

 

 

This Verified Design Includes:

  • Theory
  • Component Selection
  • TINA-TI Simulation
  • Schematics and PCB Layout
  • Verification and Measured Performance
  • Modification Options

 

 

Design files & products

Design files

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

TIDR153.PDF (199 K)

Detailed schematic diagram for design layout and components

TIDC026.ZIP (3066 K)

Detailed schematic diagram for design layout and components

TIDR154.PDF (196 K)

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

TIDC042.ZIP (2729 K)

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

Products

Includes TI products in the design and potential alternatives.

Difference amplifiers

INA146High-Voltage, Programmable Gain Difference Amplifier

Data sheet document-pdfAcrobat PDF
General-purpose op amps

LF411Single, 36-V, 3-MHz, high slew rate (13-V/µs), 2-mV offset voltage, JFET-input op amp

Data sheet document-pdfAcrobat PDF
Power op amps

OPA549High-Voltage, High-Current Op Amp, Excellent Output Swing

Data sheet document-pdfAcrobat PDF
Precision DACs (<=10MSPS)

DAC887116-Bit Single Channel, Serial Interface, +/-18V (High Voltage Bipolar) Output DAC

Data sheet document-pdfAcrobat PDF
Precision op amps (Vos<1mV)

OPA140Single, 11MHz, Single Supply, Low Noise, Precision, Rail-to-Rail Output, JFET Amplifier ;

Data sheet document-pdfAcrobat PDF open-in-new HTML
Precision op amps (Vos<1mV)

OPA227710µV, 0.1µV/˚C, High-Precision, Low-Power Operational Amplifier

Data sheet document-pdfAcrobat PDF open-in-new HTML
Series voltage references

REF1022.5-ppm/°C drift, 10-V precision voltage reference

Data sheet document-pdfAcrobat PDF

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Software

Support software

TIPD138 Simulation – TIDC044.ZIP (170 K)

Technical documentation

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* User guide 36-V 1-A SPI Controlled Power Supply With Integrated Current Shunt Design Guide (Rev. A) Jul. 16, 2014

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