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TIDA-050082

High-voltage, positive rail active precharge reference design

Design files

TIDA-050082

Design files

Overview

This reference design utilizes a buck-converter topology to precharge large high-voltage (HV) DC- link capacitances in hybrid electric vehicles (HEV), electric vehicles (EV), and energy storage systems (ESS). This design expands upon and updates High-Voltage Solid-State Relay Active Precharge Reference Design.

Features
  • Charges 2mF capacitance from 0V to 800V within 400ms
  • 4.5AAVG, 10APK-PK charging current
  • 5kVRMS reinforced isolation
  • Integrated isolated bias supply for high-side rail and positive-rail MOSFET or IGBT gate drive
  • Integrated comparators for hysteretic current control
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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-050082
PDF | HTML
TIDUFH5.PDF (2976 KB)

Reference design overview and verified performance test data

download Assembly drawing — TIDA-050082
SLURBB4.PDF (196 KB)

Detailed overview of design layout for component placement

download Bill of materials (BOM) — TIDA-050082
SLURBB5.PDF (164 KB)

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

download CAD/CAE symbol — TIDA-050082
SLURBB7.ZIP (4521 KB)

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

download Gerber file — TIDA-050082
SLVC947.ZIP (786 KB)

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

download PCB layout — TIDA-050082
SLURBB6.PDF (865 KB)

PCB layer plot file used for generating PCB design layout

download Schematic — TIDA-050082
SLVRC09.PDF (285 KB)

Detailed schematic diagram for design layout and components

Products

Includes TI products in the design and potential alternatives.

Solid-state relays

TPSI31P1-Q1 — Automotive active pre-charge controller with 17V isolated gate driver and bias supply

Data sheet: PDF | HTML

Start development

Software development

Calculation tool

TPSI31P1-DOUBLE-RSENSE-CALC — Helps calculate/simulate active precharge using double Rsense configuration

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-050082 — High-voltage, positive rail active precharge reference design
Evaluation board
TPSI31PXQ1EVM — TPSI31Px-Q1 evaluation module
Download options

TPSI31P1-DOUBLE-RSENSE-CALC — Helps calculate/simulate active precharge using double Rsense configuration

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Latest version
Version: 0.8
Release date: Mar 24, 2026
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download

TPSI31P1-Double-Rsense-Calculator-Tool_0p8.xlsx  — 82943 K

Helps calculate/simulate active precharge using double Rsense configuration

SHA-256 checksum
Products
Solid-state relays
TPSI31P1-Q1 — Automotive active pre-charge controller with 17V isolated gate driver and bias supply
Hardware development
Reference design
TIDA-050082 — High-voltage, positive rail active precharge reference design
Evaluation board
TPSI31PXQ1EVM — TPSI31Px-Q1 evaluation module

Release Information

Updated to be specific about Rsense configuration, added propagation delay input, fixed delay calculation
Calculation tool

TPSI31P1-SINGLE-RSENSE-CALC — Helps calculate/simulate active precharge behavior using single Rsense configuration

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-050082 — High-voltage, positive rail active precharge reference design
Evaluation board
TPSI31PXQ1EVM — TPSI31Px-Q1 evaluation module
Download options

TPSI31P1-SINGLE-RSENSE-CALC — Helps calculate/simulate active precharge behavior using single Rsense configuration

close
Latest version
Version: 0.8
Release date: Mar 24, 2026
open-in-new

View all versions

download

TPSI31P1-Single-Rsense-Calculator-Tool_0p8.xlsx  — 61810 K

Helps calculate/simulate active precharge behavior using single Rsense configuration

SHA-256 checksum
Products
Solid-state relays
TPSI31P1-Q1 — Automotive active pre-charge controller with 17V isolated gate driver and bias supply
Hardware development
Reference design
TIDA-050082 — High-voltage, positive rail active precharge reference design
Evaluation board
TPSI31PXQ1EVM — TPSI31Px-Q1 evaluation module

Release Information

Updated to be specific about Rsense configuration, added propagation delay input, fixed delay calculation

Technical documentation

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* Design guide High-Voltage, Positive Rail Active Precharge Reference Design PDF | HTML Mar 17, 2026

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