TIDA-00300

Isolated power architecture reference design for communication and analog input/output modules

TIDA-00300

Design files

Overview

This reference design provides a means to isolate I2C or SPI communication lines. This is often required in grid infrastructure applications such as protection relays and circuit breakers where high voltages are involved. This reference design provides both power isolation and signal isolation.

Features
  • Designed to be adopted with designs requiring isolation for communication channels (transformer and motor / generator protection)
  • Designed to operate with 24-V auxiliary DC input (typical in smart grid)
  • Optimized for multiple isolated and non-isolated supplies using single converter
  • Capable of providing signal isolation of 2500 Vrms for one minute per UL and 4242 Vpk per VDE

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.

TIDU562B.PDF (2604 K)

Reference design overview and verified performance test data

TIDRBE9B.ZIP (1143 K)

Detailed schematic diagram for design layout and components

TIDRBF0B.ZIP (477 K)

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

TIDRBF1B.ZIP (876 K)

Detailed overview of design layout for component placement

TIDRBF3B.ZIP (9167 K)

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

TIDC713B.ZIP (2051 K)

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

TIDRBF2B.ZIP (3201 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Digital isolators

ISO7141CCQuad-channel, 3/1, 50-Mbps digital isolator

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Digital isolators

ISO7741Robust EMC, quad-channel, 3/1, reinforced digital isolator

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Boost converters (integrated switch)

TPS612200.7-VIN, adjustable output voltage boost converter with 5.5-μA quiescent current

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Buck converters (integrated switch)

TPS628212.4V-5.5V input, 1A step-down converter With 1% Accuracy in 1.5x2mm QFN

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Charge pumps (inductorless)

LM27762Low-Noise Positive- and Negative-Output Charge Pump With Integrated LDO

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Comparators

TLV3012Low-power comparator with reference (push-pull)

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ESD & surge protection ICs

TVS05005V flat-clamp surge protection device

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ESD & surge protection ICs

TVS140014V flat-clamp surge protection device

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ESD & surge protection ICs

TVS330033V flat-Clamp surge protection device

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I2C isolators

ISO15412.5-kVrms, isolated unidirectional clock, bidirectional I2C isolator

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Inverting buffers & drivers

SN74LVC1G14Single 1.65-V to 5.5-V inverter with Schmitt-Trigger inputs

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Isolated DC/DC converters & modules

DCH010515DMiniature, 1W, 3kVDC Isolated DC/DC Converters

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Isolated DC/DC converters & modules

DCH010515SMiniature, 1W, 3kVDC Isolated DC/DC Converters

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Isolated DC/DC converters & modules

DCP010505BMiniature, 1W Isolated Unregulated DC/DC Converters

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Isolated DC/DC converters & modules

DCR010505Miniature, 1W Isolated Regulated DC/DC Converters

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Isolated DC/DC converters & modules

LM50177.5-100V Wide Vin, 600mA Constant On-Time Synchronous Buck Regulator

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Isolated DC/DC converters & modules

LM5160LM5160 wide input 65V, 2A synchronous buck/Fly-Buck™ converter

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Isolated DC/DC converters & modules

TPS550102.95V To 6V Input, 2W, Isolated DC/DC Converter with Integrated FETS

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Isolated DC/DC converters & modules

UCC12050500-mW, high-efficiency, 5-kVRMS isolated DC/DC converter

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LCD & OLED display power & drivers

TPS65130Split-Rail Converter with Dual, Positive and Negative Outputs (300mA typ)

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Linear & low-dropout (LDO) regulators

LP2985-N150-mA, 16-V, low-dropout voltage regulator with enable

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Linear & low-dropout (LDO) regulators

TLV704150-mA, 24-V, ultra-low-IQ, low-dropout voltage regulator

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Linear & low-dropout (LDO) regulators

TLV713150-mA, capacitor-free low-dropout voltage regulator with enable

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Linear & low-dropout (LDO) regulators

TLV742P200-mA low-IQ low-dropout (LDO) voltage regulator

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Linear & low-dropout (LDO) regulators

TLV760100-mA, 30-V, low-dropout voltage regulator

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Linear & low-dropout (LDO) regulators

TPS709150-mA, 30-V, ultra-low-IQ, low-dropout voltage regulator with reverse current protection and enable

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Linear & low-dropout (LDO) regulators

TPS76050-mA, 16-V, low-dropout voltage regulator with enable

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Linear & low-dropout (LDO) regulators

TPS763150-mA, 10-V, low-dropout voltage regulator with enable

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Linear & low-dropout (LDO) regulators

TPS782150-mA, nano-IQ, low-dropout voltage regulator with enable from -40°C to +125°C

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Linear & low-dropout (LDO) regulators

TPS7A16100-mA, 60-V, ultra-low-IQ, low-dropout (LDO) voltage regulator with power good and enable

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Linear & low-dropout (LDO) regulators

TPS7A30200-mA, low-noise, high-PSRR, negative, adjustable low-dropout voltage regulator with enable

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Linear & low-dropout (LDO) regulators

TPS7A3001-EPEnhanced Product Negative Vin, -200mA, Ultra-Low-Noise, High-PSRR, Low-Dropout Linear Regulator

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Linear & low-dropout (LDO) regulators

TPS7A39150-mA, 33-V, low-noise, high-PSRR, dual-channel positive & negative low-dropout voltage regulator

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Linear & low-dropout (LDO) regulators

TPS7A471-A, 36-V, low-noise, high-PSRR, low-dropout voltage regulator with enable

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Load switches

TPS229175.5-V, 2-A, 80-mΩ , 10-nA leakage load switch adj. rise time and adj output discharge

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Load switches

TPS229445.5-V, 0.1-A, 500-mΩ, load switch with current limit and active high enable

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Load switches

TPS229602-ch, 5.5-V, 0.5-A, 435-mΩ load switch with output discharge

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Precision op amps (Vos<1mV)

OPA2376Dual, precision, low-noise, low quiescent current operational amplifier

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Series voltage references

REF30252.5-V, 50-ppm/°C, 50-µA in 3-pin SOT-23 package series (bandgap) voltage reference

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Series voltage references

REF34252.5-V, low-drift, low-power, small-footprint series voltage reference

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Shunt voltage references

LM4040Fixed voltage, 45-µA, precision micropower shunt voltage reference

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Signal isolators with integrated power

ISOW7841Quad-channel, 3/1, reinforced digital isolator with integrated power

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Supervisor & reset ICs

TPS3895Single-channel, ultra-small, adjustable supervisor with active-high, push-pull output

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Supervisor & reset ICs

TPS3897Single-channel, ultra-small, adjustable supervisor with active-high, open-drain output

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Transformer drivers

SN6501Low-noise, 350-mA, 410-kHz transformer driver for isolated power supplies

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Transformer drivers

SN6505BLow-noise, 1-A, 420-kHz transformer driver with soft start for isolated power supplies

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Technical documentation

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Type Title Date
* Design guide Isolated Power Architecture Reference Design for Communication and Analog Input (Rev. B) Oct. 29, 2019
White paper High-Voltage Semiconductor Solutions for Meeting Isolation Requirements Jan. 20, 2021

Related design resources

Hardware development

EVALUATION BOARD
BOOSTXL-RS232 TRS3122E: RS-232 transceiver BoosterPack™ Plug-in Module ISO1042DWEVM ISO1042DW High Speed, High Performance, Robust EMC Isolated CAN Evaluation Module ISO1410DWEVM ISO1410DW high-performance, robust-EMC isolated RS-485 evaluation module ISO1412DWEVM ISO1412DW high-performance, robust-EMC isolated full-duplex RS-485 evaluation module ISO1500DBQEVM ISO1500DBQ ultra-small package, isolated RS-485 evaluation module ISO7741EVM ISO7741 high-speed, robust EMC quad-channel digital isolator evaluation module ISO7842-EVM High-Immunity, 5.7kVRMS Reinforced Quad-Channel 2/2 Digital Isolator Evaluation Module RS485-FL-DPLX-EVM RS-485 full-duplex evaluation module RS485-HF-DPLX-EVM RS-485 half-duplex evaluation module TCAN1042DEVM TCAN10xx controller area network (CAN) evaluation module TRS3122EEVM TRS3122E: 1.8V RS-232 Transceiver Evaluation Module

Reference designs

REFERENCE DESIGN
TIDA-00227 Small Form Factor 12W Ultra Wide Range Power Supply for Protection Relays - Reference Design TIDA-00834 High Accuracy Analog Front End Using 16-Bit SAR ADC with ±10V Measurement Range Reference Design TIDA-01633 Compact Programmable 4-20mA and +/-10V Analog Output Reference Design for AC/Servo Drives

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