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TPSI3050-Q1

ACTIVE

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

Product details

Withstand isolation voltage (VISO) (Vrms) 5000 FET External Number of channels 1 Supply voltage (min) (V) 3 Supply voltage (max) (V) 48 Gate drive voltage (V) 10 Features Inductive isolation TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125 Turnoff time (disable) (ns) 3000 Rating Automotive Isolation rating Reinforced CMTI (min) (kV/µs) 100 Working isolation voltage (VIOWM) (Vrms) 1414 Surge isolation voltage (VIOSM) (VPK) 12000 Transient isolation voltage (VIOTM) (VPK) 7070
Withstand isolation voltage (VISO) (Vrms) 5000 FET External Number of channels 1 Supply voltage (min) (V) 3 Supply voltage (max) (V) 48 Gate drive voltage (V) 10 Features Inductive isolation TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125 Turnoff time (disable) (ns) 3000 Rating Automotive Isolation rating Reinforced CMTI (min) (kV/µs) 100 Working isolation voltage (VIOWM) (Vrms) 1414 Surge isolation voltage (VIOSM) (VPK) 12000 Transient isolation voltage (VIOTM) (VPK) 7070
SO-MOD (DWZ) 8 67.275 mm² 5.85 x 11.5
  • No isolated secondary supply required
  • Drives external power transistors or SCRs
  • 5-kV RMS reinforced isolation
  • 10-V gate drive with 1.5/3-A peak source and sink current
  • Up to 50-mW supply for external auxiliary circuitry
  • Supports AC or DC switching
  • Supports two-wire or three-wire modes
  • Seven levels of power transfer, resistor selectable
  • Functional Safety-Capable
  • AEC Q-100 qualified for automotive applications:
    • Temperature grade 1: –40 to +125°C, T A
  • Safety-Related Certifications
    • 7071-V PK reinforced isolation per DIN EN IEC 60747-17 (VDE 0884-17)
    • 5-kV RMS isolation for 1 minute per UL 1577
  • No isolated secondary supply required
  • Drives external power transistors or SCRs
  • 5-kV RMS reinforced isolation
  • 10-V gate drive with 1.5/3-A peak source and sink current
  • Up to 50-mW supply for external auxiliary circuitry
  • Supports AC or DC switching
  • Supports two-wire or three-wire modes
  • Seven levels of power transfer, resistor selectable
  • Functional Safety-Capable
  • AEC Q-100 qualified for automotive applications:
    • Temperature grade 1: –40 to +125°C, T A
  • Safety-Related Certifications
    • 7071-V PK reinforced isolation per DIN EN IEC 60747-17 (VDE 0884-17)
    • 5-kV RMS isolation for 1 minute per UL 1577

The TPSI3050-Q1 is a fully integrated, isolated switch driver, which when combined with an external power switch, forms a complete isolated solid state relay (SSR). With a nominal gate drive voltage of 10 V with 1.5/3.0-A peak source and sink current, a large variety of external power switches can be chosen to meet a wide range of applications. The TPSI3050-Q1 generates its own secondary bias supply from the power received from its primary side, so no isolated secondary supply bias is required. Additionally, the TPSI3050-Q1 can optionally supply power to external supporting circuitry for various application needs.

The TPSI3050-Q1 supports two modes of operation based on the number of input pins required. In two-wire mode, typically found in driving mechanical relays, controlling the switch requires only two pins and supports a wide voltage range of operation of 6.5 V to 48 V. In three-wire mode, the primary supply of 3 V to 5.5 V is supplied externally, and the switch is controlled through a separate enable. Available in three-wire mode only, the TPSI3050S-Q1 features a one-shot enable for the switch control. This feature is useful for driving SCRs that typically require only one pulse of current to trigger.

The secondary side provides a regulated, floating supply rail of 10 V for driving a large variety of power switches with no need for a secondary bias supply. The application can drive single power switches for DC applications or dual back-to-back power switches for AC applications, as well as various types of SCR. The TPSI3050-Q1 integrated isolation protection is extremely robust with much higher reliability, lower power consumption, and increased temperature ranges than traditional mechanical relays and optocouplers.

The power transfer of the TPSI3050-Q1 can be adjusted by selecting one of seven power level settings using an external resistor from the PXFR pin to VSSP. This action allows for tradeoffs in power dissipation versus power provided on the secondary depending on the needs of the application.

The TPSI3050-Q1 is a fully integrated, isolated switch driver, which when combined with an external power switch, forms a complete isolated solid state relay (SSR). With a nominal gate drive voltage of 10 V with 1.5/3.0-A peak source and sink current, a large variety of external power switches can be chosen to meet a wide range of applications. The TPSI3050-Q1 generates its own secondary bias supply from the power received from its primary side, so no isolated secondary supply bias is required. Additionally, the TPSI3050-Q1 can optionally supply power to external supporting circuitry for various application needs.

The TPSI3050-Q1 supports two modes of operation based on the number of input pins required. In two-wire mode, typically found in driving mechanical relays, controlling the switch requires only two pins and supports a wide voltage range of operation of 6.5 V to 48 V. In three-wire mode, the primary supply of 3 V to 5.5 V is supplied externally, and the switch is controlled through a separate enable. Available in three-wire mode only, the TPSI3050S-Q1 features a one-shot enable for the switch control. This feature is useful for driving SCRs that typically require only one pulse of current to trigger.

The secondary side provides a regulated, floating supply rail of 10 V for driving a large variety of power switches with no need for a secondary bias supply. The application can drive single power switches for DC applications or dual back-to-back power switches for AC applications, as well as various types of SCR. The TPSI3050-Q1 integrated isolation protection is extremely robust with much higher reliability, lower power consumption, and increased temperature ranges than traditional mechanical relays and optocouplers.

The power transfer of the TPSI3050-Q1 can be adjusted by selecting one of seven power level settings using an external resistor from the PXFR pin to VSSP. This action allows for tradeoffs in power dissipation versus power provided on the secondary depending on the needs of the application.

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Technical documentation

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Type Title Date
* Data sheet TPSI3050-Q1 Automotive Reinforced Isolated Switch Driver With Integrated 10-V Gate Supply datasheet (Rev. D) PDF | HTML 16 Aug 2023
White paper 設計更安全、更智慧且更緊密相連的電池管理系統 PDF | HTML 24 Jan 2024
White paper 더욱 안전하고 스마트하며 더욱 연결된 배터리 관리 시스템 설계 PDF | HTML 24 Jan 2024
White paper Designing Safer, Smarter and More Connected Battery Management Systems PDF | HTML 23 Jan 2024
Functional safety information TPSI3050-Q1 Functional Safety FIT Rate, FMD, and Pin FMA (Rev. A) PDF | HTML 14 Apr 2023
EVM User's guide TPSI3050Q1EVM Automotive Reinforced Isolated Switch Driver (Rev. C) PDF | HTML 03 Nov 2022
Certificate TPSI3050Q1EVM EU RoHS Declaration of Conformity (DoC) (Rev. A) 18 Aug 2022
Product overview When to use SSR or Isolated Gate Driver PDF | HTML 04 Aug 2022
Technical article How to design high-voltage systems with higher reliability while reducing solution PDF | HTML 08 Jun 2022
Technical article How to achieve higher-reliability isolation and a smaller solution size with solid PDF | HTML 09 May 2022
Design guide Overcurrent and Overtemperature Protection for Solid-State Relays Ref Design PDF | HTML 04 May 2022
Design guide Zero-Cross Switching for Solid-State Relays Reference Design PDF | HTML 04 May 2022
Application note Cascoding Two TPSI3050 Isolated Switch Drivers to Increase Gate Drive Voltage PDF | HTML 07 Apr 2022
Application brief Why Pre-Charge Circuits Are Necessary in High Voltage Systems PDF | HTML 13 Dec 2021
Application note TPSI3050-Q1 Change List PDF | HTML 08 Nov 2021

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

TPSI3050Q1EVM — TPSI3050-Q1 evaluation module for automotive load switch driver with reinforced isolation

The evaluation module TPSI3050Q1EVM helps designers and applications to evaluate the performance of the devices for mutiple applications. This evaluation module focuses on showing the performance of the isolated switch driver while driving FETs. 
User guide: PDF | HTML
Not available on TI.com
Simulation model

TPSI3050-Q1 and TPSI3050 PSpice Transient Model (Rev. G)

SLVMDL0G.ZIP (74 KB) - PSpice Model
Simulation model

TPSI3050S-Q1 and TPSI3050S PSpice Transient Model (Rev. F)

SLVMDP6F.ZIP (35 KB) - PSpice Model
Calculation tool

SLVRBI9 TPSI3050-Q1, TPSI3052-Q1, TPSI3050, TPSI3052 Design Calculator

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
Simulation tool

CMSO-3P-BCS — comemso battery cell simulator

The Battery Cell Simulator (BCS) is the core of any test Battery Management System (BMS). It allows the simulation of all required states and faults for the BMS on the cell level.
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Reference designs

TIDA-050059 — Overcurrent and overtemperature protection for solid-state relays reference design

This reference design shows how to achieve overcurrent and overtemperature protection for a solid-state relay. The reference design features the TPSI3050-Q1 5-kVRMS reinforced isolated switch driver. TPSI3050-Q1 device integrates a laminate transformer to achieve isolation while transferring signal (...)
Design guide: PDF
Reference designs

TIDA-050058 — Zero-cross switching for solid-state relays reference design

This reference design shows how to achieve zero-cross switching (ZCS) with a solid-state relay. The reference design features the TPSI3050-Q1 isolated switch driver. TPSI3050-Q1 device integrates a laminate transformer to achieve isolation while transferring signal and power to the secondary side. (...)
Design guide: PDF
Reference designs

TIDA-050063 — High-voltage solid-state relay active precharge reference design

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 guide: PDF
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