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TIDA-050063

High-voltage solid-state relay active precharge reference design

Design files

TIDA-050063

Design files

Overview

This reference design introduces an innovative circuit topology to precharge large DC link capacitors for hybrid electric vehicles (HEV) and electric vehicles (EV). The reference design features a system which does not require a microcontroller and can be operated with a 5-V supply. The reference design has reinforced isolation rating of 5-kVRMS with the TPSI3052-Q1. TPSI3052-Q1 device integrates a laminate transformer to achieve isolation while transferring signal and power to the secondary side. This removes the need for a discrete isolated bias supply. In addition, the TPSI3052-Q1 device can supply power to external circuitry located on the high voltage (HV) side to monitor current. This reference design can support up to 800-V systems with up to 4-AAVG changing current to charge up to 2-mF of load capacitance.

Features
  • 5-kVRMS reinforced isolation
  • No isolated secondary supply required
  • 800-V maximum input/output voltage
  • 4-AAVG / 8-APK-PK maximum charging current
  • Capable of charging 2-mF capacitor to 800-V in 400-ms
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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.

download Design guide — TIDA-050063
PDF | HTML
TIDUF21A.PDF (1449 KB)

Reference design overview and verified performance test data

download Assembly drawing — TIDA-050063
TIDMB89.PDF (201 KB)

Detailed overview of design layout for component placement

download Bill of materials (BOM) — TIDA-050063
TIDMB88.PDF (155 KB)

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

download CAD/CAE symbol — TIDA-050063
TIDMB91.ZIP (2264 KB)

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

download Gerber file — TIDA-050063
TIDCGC7.ZIP (1598 KB)

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

download PCB layout — TIDA-050063
TIDMB90.PDF (595 KB)

PCB layer plot file used for generating PCB design layout

download Schematic — TIDA-050063
TIDMB87.PDF (274 KB)

Detailed schematic diagram for design layout and components

Products

Includes TI products in the design and potential alternatives.

Comparators

TLV7011 — Low power, small size comparator with push-pull output

Data sheet: PDF | HTML
Low-side drivers

UCC27517A-Q1 — Automotive 4-A/4-A single-channel gate driver with 5-V UVLO and dual-input structure

Data sheet: PDF | HTML
Solid-state relays

TPSI3050-Q1 — Automotive reinforced isolated switch driver with integrated 10-V gate supply

Data sheet: PDF | HTML
Solid-state relays

TPSI3052-Q1 — Automotive reinforced isolated switch driver with integrated 15-V gate supply

Data sheet: PDF | HTML

Start development

Software

Calculation tool

ACTIVE-PRECHARGE-CALC — Active precharge reference design (TIDA-050063) calculator tool

Supported products & hardware

Supported products & hardware

Products
Solid-state relays
TPSI3050 — Isolated switch driver with integrated 10-V gate supply TPSI3050-Q1 — Automotive reinforced isolated switch driver with integrated 10-V gate supply TPSI3052 — Isolated switch driver with integrated 15-V gate supply TPSI3052-Q1 — Automotive reinforced isolated switch driver with integrated 15-V gate supply
Hardware development
Reference design
TIDA-050063 — High-voltage solid-state relay active precharge reference design
Download options

ACTIVE-PRECHARGE-CALC — Active precharge reference design (TIDA-050063) calculator tool

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Latest version
Version: 14.0.0
Release date: Apr 17, 2024
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ACTIVE-PRECHARGE-CALC_14-0-0.xlsx  — 297 K

Spreadsheet calculator to help select active precharge design component values based on customer requirements.

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Products
Solid-state relays
TPSI3050 — Isolated switch driver with integrated 10-V gate supply TPSI3050-Q1 — Automotive reinforced isolated switch driver with integrated 10-V gate supply TPSI3052 — Isolated switch driver with integrated 15-V gate supply TPSI3052-Q1 — Automotive reinforced isolated switch driver with integrated 15-V gate supply
Hardware development
Reference design
TIDA-050063 — High-voltage solid-state relay active precharge reference design

Release Information

Revision 14 of the calculator tool, first release for customers.
Calculation tool

TPSI31P1-CALC — Helps calculate/simulate active precharge behavior using TPSI31P1 device as primary driver.

Supported products & hardware

Supported products & hardware

Products
Solid-state relays
TPSI31P1-Q1 — Automotive active pre-charge controller with 17V isolated gate driver and bias supply
Hardware development
Reference design
TIDA-050063 — High-voltage solid-state relay active precharge reference design
Evaluation board
TPSI31PXQ1EVM — TPSI31Px-Q1 evaluation module
Download options

TPSI31P1-CALC — Helps calculate/simulate active precharge behavior using TPSI31P1 device as primary driver.

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Latest version
Version: 0.4
Release date: Aug 5, 2025
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TPSI31P1-Calculator-Tool_0p4.xlsx  — 83873 K

Helps calculate/simulate active precharge behavior using TPSI31P1 device as primary driver based on user input, outputting various graphs to estimate circuit behavior, aiding in design.

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Products
Solid-state relays
TPSI31P1-Q1 — Automotive active pre-charge controller with 17V isolated gate driver and bias supply
Hardware development
Reference design
TIDA-050063 — High-voltage solid-state relay active precharge reference design
Evaluation board
TPSI31PXQ1EVM — TPSI31Px-Q1 evaluation module

Release Information

First version

Technical documentation

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Type Title Date
* Design guide High-Voltage Solid-State Relay Active Precharge Reference Design (Rev. A) PDF | HTML Jan 24, 2023
Technical article Designing a high voltage DC-link capacitor active precharge circuit PDF | HTML Aug 4, 2025

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