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TPS1HA08-Q1, 40-V, 8-mΩ Single-Channel Smart High-Side Switch
SLVSDM4D
November 2018 – December 2019
TPS1HA08-Q1
PRODUCTION DATA.
CONTENTS
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TPS1HA08-Q1, 40-V, 8-mΩ Single-Channel Smart High-Side Switch
1
Features
2
Applications
3
Description
Simplified Schematic
4
Revision History
5
Device Comparison Table
6
Pin Configuration and Functions
Pin Functions
6.1
Recommended Connections for Unused Pins
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Switching Characteristics
7.7
SNS Timing Characteristics
7.8
Typical Characteristics
8
Parameter Measurement Information
9
Detailed Description
9.1
Overview
9.1.1
Device Nomenclature
9.2
Functional Block Diagram
9.3
Feature Description
9.3.1
Protection Mechanisms
9.3.1.1
Thermal Shutdown
9.3.1.2
Current Limit
9.3.1.2.1
Current Limit Foldback
9.3.1.2.2
Selectable Current Limit Threshold
9.3.1.2.3
Undervoltage Lockout (UVLO)
9.3.1.2.4
VBB during Short-to-Ground
9.3.1.3
Energy Limit
9.3.1.4
Voltage Transients
9.3.1.4.1
Load Dump
9.3.1.4.2
Driving Inductive and Capacitive Loads
9.3.1.5
Reverse Battery
9.3.1.6
Fault Event – Timing Diagrams
9.3.2
Diagnostic Mechanisms
9.3.2.1
VOUT Short-to-Battery and Open-Load
9.3.2.1.1
Detection With Switch Enabled
9.3.2.1.2
Detection With Switch Disabled
9.3.2.2
SNS Output
9.3.2.2.1
RSNS Value
9.3.2.2.1.1
High Accuracy Load Current Sense
9.3.2.2.1.2
SNS Output Filter
9.3.2.3
ST Pin
9.3.2.4
Fault Indication and SNS Mux
9.3.2.5
Resistor Sharing
9.3.2.6
High-Frequency, Low Duty-Cycle Current Sensing
9.3.3
Enable Watchdog
9.4
Device Functional Modes
9.4.1
Off
9.4.2
Standby
9.4.3
Diagnostic
9.4.4
Standby Delay
9.4.5
Active
9.4.6
Fault
10
Application and Implementation
10.1
Application Information
10.1.1
Ground Protection Network
10.1.2
Interface With Microcontroller
10.1.3
I/O Protection
10.1.4
Inverse Current
10.1.5
Loss of GND
10.1.6
Automotive Standards
10.1.6.1
ISO7637-2
10.1.6.2
AEC – Q100-012 Short Circuit Reliability
10.1.7
Thermal Information
10.2
Typical Application
10.2.1
Design Requirements
10.2.2
Detailed Design Procedure
10.2.2.1
Thermal Considerations
10.2.2.2
Diagnostics
10.2.2.2.1
Selecting the RISNS Value
10.2.3
Application Curves
11
Power Supply Recommendations
12
Layout
12.1
Layout Guidelines
12.2
Layout Example
13
Device and Documentation Support
13.1
Device Support
13.1.1
Related Documentation
13.2
Trademarks
13.3
Electrostatic Discharge Caution
13.4
Glossary
14
Mechanical, Packaging, and Orderable Information
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DATA SHEET
TPS1HA08-Q1, 40-V, 8-mΩ Single-Channel Smart High-Side Switch
1
Features
Single-channel smart high-side switch with 8-mΩ R
ON
(T
J
= 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
2
Applications
Body control modules
Incandescent and LED lighting
Heating elements:
Seat heaters
Glow plug
Tank heaters
Transmission control unit
Climate control
Infotainment display
ADAS modules
