Texas Instruments TPS2HCS10-Q1 Dual-Channel Smart High-Side Switch
Texas Instruments TPS2HCS10-Q1 Dual-Channel Smart High-Side Switch is controlled through a serial peripheral interface (SPI) and is intended for power distribution and actuator drive applications. The device incorporates robust protection to safeguard the output wire and load against short circuits or overload conditions. The device features overcurrent protection that is configurable via SPI, providing sufficient flexibility to support loads that require large inrush currents and offering improved protection. The device also features a programmable fuse profile (current versus time), which automatically turns off the switch under persistent overload conditions. The two features together enable the optimization of the wire harness for any load profile, providing full protection.
The Texas Instruments TPS2HCS10-Q1 supports a SPI-configurable capacitive charging mode for electronic control unit (ECU) loads in power distribution switch applications. The device also includes two low-power mode (LPM) states, an auto-entry mode, and a manual-entry mode, which enable the device to provide current to the load ECU while consuming only about 10–20µA of current. The device also provides high-accuracy digital current sensing over SPI, allowing for improved load diagnostics. By reporting load current and the channel output voltage, and output FET temperature to a system MCU, the device enables diagnosis of switch and load failures. The TPS2HCS10-Q1 is available in an HTSSOP package, which allows for a reduced PCB footprint.
Features
- AEC-Q100 qualified for automotive applications
- Temperature grade 1: –40°C to 125°C
- Withstands 36V load dump
- Dual-channel SPI-controlled smart high-side switch with integrated nFETs
- Integrated wire-harness protection without MCU involvement and an SPI programmable fuse curve for protection against persistent overload conditions
- Improve system-level reliability through SPI programmable adjustable overcurrent protection
- SPI configurable capacitive charging mode to drive a wide range of capacitive input ECU's load current needs.
- Low quiescent current, low power ON-state to supply always-ON loads with automatic wake on load current increase, with a wake signal to the MCU
- Robust integrated output protection
- Integrated thermal protection
- Protection against short-to-ground
- Protection against reverse battery events, including automatic switch-on of the FET with reverse supply voltage
- Automatic shut off on loss of battery and ground
- Integrated output clamp to demagnetize inductive loads
- Digital sense output via SPI can be configured to measure
- Load current accurately with integrated ADC
- Output or supply voltage, FET temperature
- Provides full fault diagnostics through the SPI interface and indication through the FLT pin with detection of open load and short-to-battery
Applications
- Automotive zone ECU
- Power distribution modules
- Body control modules
Simplified Schematic
Development Tools
Texas Instruments HSS-HCMOTHERBRDEVM Smart Fuse Evaluation Module
This module showcases and evaluates all TI's smart fuse high-side switch portfolio features.
Texas Instruments HSS-HCS-BLANKEVM Smart Fuse Daughtercard
Daughter card combined with HSS-HCMOTHERBRDEVM shows the functionality of TI's smart fuse portfolio.