Product details


Imax (A) 10 Current limit (Min) (A) 20 Current limit (Max) (A) 80 Current limit type Adjustable HBM ESD (kV) 2000 Current sense accuracy +13%/-5% @ 1A Features Current sense output, Current sense/monitor, Programmable current limit, Thermal shutdown, Under voltage lock out Rating Automotive open-in-new Find other High-side switches

Package | Pins | Size

HTSSOP (PWP) 16 32 mm² 5 x 6.4 open-in-new Find other High-side switches


  • Single-channel smart high-side switch with 8-mΩ RON (TJ = 25°C)
  • Qualified for automotive applications:
    • AEC Q-100 Qualified
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature range
    • Withstands 40-V load dump
  • Functional safety capable
    • Documentation available to aid functional safety system design
  • Improve reliability through selectable current limiting
    • Current limit set-point at 20 A or 80 A
    • Overcurrent response of current clamping or instant shutdown
  • Robust integrated output protection:
    • Integrated thermal protection
    • Protection against short to ground and battery
    • Automatic switch-on during reverse battery
    • Automatic shut off if loss of battery and ground occurs
    • Integrated output clamp to demagnetize inductive loads
    • Configurable fault handling
  • Analog sense output can be configured to accurately measure:
    • Load current
    • Supply voltage
    • Device temperature
  • Provides FLT indication back to MCU
    • Detection of open load and short-to-battery
open-in-new Find other High-side switches


The device is a single-channel smart high-side switch intended for use with 12-V automotive systems. The device integrates robust protection and diagnostic features to ensure output port protection even during harmful events like short circuits. The device protects against faults through a reliable current limit, which, depending on device variant, is available at both 80 A and 20 A and can be configured to react to an overcurrent event by either instantly turning the switch off or by regulating the output current at the set point. The high current limit option allows for usage in loads that require large transient currents, while the low current limit option provides improved protection for loads that do not require high peak current.

The also provides a high accuracy analog current sense that allows for improved diagnostics when driving varied load profiles. By reporting load current, device temperature, and supply voltage to a system MCU, the device enables predictive maintenance and load diagnostics that lengthen the system lifetime.

The is available in a small 16-pin HTSSOP package which allows for reduced PCB footprint.

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NEW TPS27SA08 ACTIVE 36-V, 8-mΩ, 10-A, 1-ch, Industrial high-side switch with current sense Industrial version designed for 24-V supply voltages
NEW TPS27SA08-Q1 ACTIVE 36-V, 8-mΩ, 10-A, 1-ch automotive smart high-side switch with current monitoring Automotive version designed for 24-V supply voltage with 40-V load dump

Technical documentation

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Type Title Date
* Data sheet TPS1HA08-Q1, 40-V, 8-mΩ Single-Channel Smart High-Side Switch datasheet (Rev. D) Dec. 18, 2019
Functional safety information TPS1HA08-Q1 Functional Safety FIT Rate, FMD and Pin FMA (Rev. A) Jul. 01, 2021
Application note How To Drive Resistive, Inductive, Capacitive, and Lighting Loads (Rev. E) Mar. 09, 2021
Application note Driving PWM Loads with TI High-Side Switches Mar. 02, 2021
Application note Using PSpice Simulator to Model Thermal Behavior in TI’s Smart High-Side Switch Nov. 30, 2020
Application note Fault and Normal Diagnostic Considerations for Smart High Side Switches Jul. 10, 2020
White paper Streamlining Functional Safety Certification in Automotive and Industrial Jun. 09, 2020
White paper 簡化汽車及工業領域的功 能安全認證 Jun. 09, 2020
White paper 자동차 및 산업 분야의 기능적 안전성 인증 간소화 Jun. 09, 2020
Application note High Accuracy Current Sense of Smart High Side Switches Nov. 01, 2019
E-book 11 Ways to Protect Your Power Path white paper Jul. 03, 2019
Application note AEC-Q100-012 Short-Circuit Reliability Test Results for Smart Power Switches (Rev. A) May 06, 2019
Application note Basics of Power Switches (Rev. A) Apr. 26, 2019
Application note Improved Automotive Short Circuit Reliability With Adjustable Current Limiting (Rev. A) Apr. 11, 2019
Application note Adjustable Current Limit of Smart Power Switches (Rev. B) Jan. 21, 2019
Application note Reverse battery protection for high side switches Nov. 12, 2018

Design & development

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

Hardware development

High side switches motherboard
document-generic User guide
The HSS-MOTHERBOARDEVM evaluation module is designed to evaluate the <50mΩ Ron devices in TI's high side switch portfolio. These devices include TPS1HA08-Q1, TPS2HB08-Q1, TPS2HB16-Q1, TPS2HB35-Q1, and TPS2HB50-Q1. This board does not come populated with the devices, but allows any of the (...)
  • Single or dual-channel high-side power switch, tested according to AECQ100-12
  • High-accuracy current sense
  • Reverse battery protection with external ground network
  • Short circuit and overvoltage protection
  • Themal shudown and thermal swing self-recovery

Design tools & simulation

SLVMC98D.ZIP (60 KB) - PSpice Model
SLVMC99C.ZIP (673 KB) - PSpice Model
SLVMCK7B.ZIP (61 KB) - PSpice Model
SLVMCK8B.ZIP (123 KB) - PSpice Model
SLVMDM3.ZIP (130 KB) - PSpice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

Smart Power Switch for Seat Heater Reference Design
TIDA-01184 — This reference design showcases the TPS1HA08-Q1 device, which is used to control an automotive seat heater. The system consists of a main board and heating element, which represents the resistive heating component found in automotive seat heaters. This system demonstrates the ability to (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 16 View options

Ordering & quality

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  • MSL rating/Peak reflow
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  • Qualification summary
  • Ongoing reliability monitoring

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