Texas Instruments TPS2HCS10-Q1 User manual
EVM User's Guide: TPS2HCS10-Q1
Smart Fuse Evaluation Module
Description
The HSS-HCMOTHERBRDEVM and corresponding
daughter cards (such as the HSS-2HCS10EVM)
are used to showcase and evaluate all features of
the Texas Instruments' smart fuse high-side switch
portfolio. The motherboard is designed to be used
with several different daughter cards enabling the use
of a single host EVM for a variety of different high-side
switches with varying on-resistances and functionality.
A pre-flashed MCU is included with each HSS-
HCMOTHERBOARDEVM to act as a USB-to-SPI
bridge and allow the user to seamlessly configure/
manipulate the device. This MCU communicates
with a Windows® host GUI application titled Smart
Fuse Configurator to allow for full configuration and
evaluation of the attached high-side switch.
Get Started
1. Order both the HSS-HCMOTHERBRDEVM and
an accompanying daughter card (such as the
HSS-2HCS10EVM) on ti.com.1
2. Plug the daughter card into the socket of the
motherboard aligning the dots to signify pin 1.
3. Connect a power supply to the VBB line (J9) and
connect the ground of the power supply to the
ground line of the board.
4. Connect the relevant loads to the outputs of the
board (J5 and J7).
5. Download the Smart Fuse Configurator from the
EVM product page.
6. Open the Smart Fuse Configurator host program
and use as described in this document.
Features
• Daughter Card Socket - Modular daughter card
design allowing to use any TI smart fuse high-side
switch via the same motherboard EVM
• TM4C123GH6 32-bit Arm Cortex-M4F based MCU
- Used as a USB to SPI host from the host PC to
the attach high-side switch daughter card
– 9-pin Cortex-M JTAG port allows for users
to program/debug their own firmware to the
TM4C123
• LMR43610-Q1 Automotive 3-V to 36-V, 1-A, low-
EMI synchronous buck regulator - Uses the supply
voltage to derive 3.3V power rail to supply VDD of
high-side switch
– Can be disabled via jumper setting if external
VDD source is desired
• Test Points - Fully accessible test-points/headers
allowing complete access to SPI lines, fault
signals, power rails
Applications
•Automotive Zone ECU
•Power Distribution Modules
•Body control modules
1The daughter cards and mother boards have two separate orderable numbers.
www.ti.com Description
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Smart Fuse Evaluation Module 1
Copyright © 2023 Texas Instruments Incorporated
1 Evaluation Module Overview
1.1 Introduction
The HSS-HCMOTHERBRDEVM and accompanying daughter card EVMs (such as the HSS-2HCS10EVM) are
hardware evaluation boards used for evaluation and development of Texas Instruments’ smart fuse high-side
switch portfolio. A daughter card and motherboard approach is used in the hardware ecosystem to promote
reuse of hardware and software, as well showcase the pin compatibility between different smart fuse devices.
As many of TI’s smart fuse high-side switches have a digital SPI interface, this hardware ecosystem is designed
to simplify evaluation and development as well as reduce the need for the user to invest any significant software
resources on the host side. The HSS-HCMOTHERBRDEVM has an integrated TM4C123 Cortex-M4F USB
microcontroller that serves as a USB-to-SPI bridge between a host PC and the attached daughter card EVM.
A simple Windows GUI program titled Smart Fuse Configurator is provided that allows a multitude of features
including:
• Reading/graphing load current, input/output voltage, and junction temperature via the high-side switch’s
integrated ADC
• Turn on/off channels and set operational settings such as PWM and current limit
• Providing an interface to tune the I2T curve and compare with a customer wire profile for fuse replacement
• Monitor device and channel fault status complete with aggregation statistics
• Setup/configure all register settings of the high-side switch directly from the GUI
• Direct register reads/writes through console view
• Export/import settings as well as export development artifacts such as C configuration arrays/structures
The host GUI software is provided both in Windows binary and BSD-licensed source code. The host GUI
does not require special drives, and uses standard Windows USB-HID calls to communicate with the HSS-
HCMOTHERBRDEVM. Only Windows is supported with this EVM ecosystem. The EVM comes with the TM4C
firmware pre-programmed without the need for the user to perform any initial firmware flashing.
1.2 Kit Contents
The EVM kit for the HSS-HCMOTHERBRDEVM includes the following:
• One HSS-HCMOTHERBRDEVM with MCU pre-flashed at factory with latest firmware
• One USB-C cable
The kit for the daughter cards are specific to the high-side switch associated with the daughter card. An example
kit contents for the HSS-2HCS10EVM daughter card can be seen below:
• One HSS-2HCS10EVM daughter card with a TPS2HCS10-Q1 high-side switch device
1.3 Specification
The HSS-HCMOTHERBRDEVM and daughter card boards are meant to be used together to evaluate
automotive applications where high-side switches are used to drive primarily off-board loads. This EVM contains
a pre-flashed microcontoller with firmware that acts as a SPI<-> USB bridge between the high-side switch (SPI)
and the host PC system running the GUI (USB). The EVM is designed for ease-of-use and all that is needed is
to plug in USB and relevant loads, supply power, and evaluate through the GUI. A block diagram of the various
blocks of the EVM can be seen below.
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Figure 1-1. Block Diagram for HSS-HCMOTHERBRDEVM
As seen from the image above, the EVM has multiple power rails that are derived from input power sources. The
12 V supply voltage is fed into a LMR43610 buck converter to derive the 3.3V rail for the high-side switch. This
buck converter is used for the low IQ functionality, so that the low-power mode of the high-side switch can be
measured through the EVM. A TLV767 LDO is used to derive the 3.3V micocontroller supply from the 5 V USB
connection through the PC.
Note that this board is intended to evaluate the standard functionality of the device. The board is not designed
to withstand automotive transients events such as hard short-to-ground events, reverse battery events, and
ISO 16750-2 load dumps. If short-to-ground is to be performed on the EVM, then TI recommends to add a
capacitance on the order of 220 µF so that the device can withstand the short-to-ground event. Additionally, as
the EVM is built for evaluation with ample test points, the EVM is not optimized for EMC testing and performance
including emissions, RF, and transient immunity tests.
1.4 Device Information
The HSS-HCMOTHERBRDEVM and daughter cards uses the following devices from Texas Instruments.
Table 1-1. Devices Used
Device Name Description Purpose
TM4C123GH6PMI7R
32-bit Arm Cortex-M4F based MCU with 80 -MHz,
256 -KB Flash, 32 -KB RAM, 2 CAN, RTC, USB,
64-Pin
Acts as USB<->SPI bridge between host PC
and high-side switch.
LMR43610MSC3RPERQ1 36-V, 1-A/2-A Buck Converter with <2.5 µA IQ at
150°C TJMAX in 4-mm2 HotRod™ QFN
Derives the 3.3V VDD rail for the high-side
switch from the input power supply
TLV76633QWDRBRQ1 Fixed-output, 1-A, 16-V, positive-voltage low-
dropout (LDO) linear regulator
Provides 3.3V supply for microcontroller from 5
V USB signal
TPS2HCS10-Q1
11-mOhm, Automotive Dual-Channel, SPI
controlled High-Side Switch with low Quiescent
Current ON Mode and Integrated I2t Wire
Protection
High-side switch being evaluated
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2 Hardware
2.1 Assembly Instructions
To get started with the HSS-HCMOTHERBRDEVM the following resources are required:
• 1x HSS-HCMOTHERBRDEVM
– Firmware is pre-flashed for the EVM and no need for the user to program the EVM initially.
– Standard USB cable included.
• 1x HSS-2HCS10EVM daughter card (or any compatible high-side switch daughter card EVM).
• Windows host with .NET framework run-time v4.7.2 (included in all Windows 10 versions).
– Can be downloaded form https://dotnet.microsoft.com/en-us/download/dotnet-framework/net472 for all
other versions.
• Texas Instruments Smart Fuse Configurator software tool (4MB).
No special drivers or large proprietary frameworks are needed to run the Smart Fuse Configurator.
To get started, plug the daughter card into the headers marked J1 and J2 on the HSS-HCMOTHERBRDEVM
as seen below. Note that the dots on the motherboard and daughter card signify the pin 1 connection for proper
alignment.
Figure 2-1. Board Alignment
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Next, plug the USB-C cable into the HSS-HCMOTHERBRDEVM as seen below.
Figure 2-2. USB Connection
If successful, then the green LED on D2 illuminates and Windows automatically detects/installs the high-side
switch EVM.
Next, connect the relevant power supply to the VBB banana jack (J8) and connect the ground connection of
the power supply to the GND banana jack of the EVM (J7) as seen below. Do the same for the desired load
connections VOUT1 (J3) and VOUT2 (J4). Make sure that the ground connections of the loads are connected
back to a ground port of the EVM (such as J9).
Figure 2-3. Loads Connected
With all of the supply, loads, and USB connected, turn on the power supply to the EVM. Note that the high-side
switches used in this EVM are designed for 12 V automotive systems, however refer to the device data sheet for
exact details on the input/output conditions supported.
With the device powered, open the auto_hss_configurator.exe executable that ships with the Smart Fuse
Configurator software package. Note that the software package from TI.com is a portable zip file and does
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not need any specific installer to operate. Once opened, the software program automatically detects the attached
high-side switch and updates the connection status to Connected as seen in the figure below:
Figure 2-4. Connected
If the EVM is not connected, then the Connection Status shows up as Disconnected. In this state, the main
elements of the GUI are disabled until the device is connected.
On the main interface, the status bar displays the latest command/status event that happened on the GUI. In this
case, the status bar message shows that the high-side switch device was connected from the High-side switch
device found and connected message. Whenever a setting is changed on the device or a significant setting is
change on the GUI a message is displayed in the status bar. A timestamped list of all previous events can be
seen in the Log tab as seen below.
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Figure 2-5. Log View
Once connected, the GUI communicates with the EVM and read out both the device ID string as well as
the firmware revision from the EVM. This information is displayed under the Detected Device section in the
Command Center tab.
Figure 2-6. Firmware Version
The detailed usage guide for each of the tabs in the software can be found in the sections below.
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2.2 Jumper Information
The HSS-HCMOTHERBRDEVM has several different jumper configurations that can configure the device in
various functional modes. The summary of these jumper configurations can be found below.
Table 2-1. Jumper Configurations
Jumper Number Purpose
J3 Unused. Leave set to the default RESISTOR setting.
J4 Connecting this jumper shorts out the ground network while leaving the jumper populated connects the diode/resistor
network on ground.
J10 Connecting this jumper derives VDD from the VB signal via a 3.3V buck converter. Disconnect this jumper if desired
to use an external source for VDD.
2.3 Interfaces
The HSS-HCMOTHERBRDEVM has several different power, programming, and diagnostic interfaces available.
The power interfaces are summarized below.
Table 2-2. Power Interfaces
Identifier Name Description
J9 VBB Main power source of the device. This is generally modeled from a 12 V automotive
supply.
J5, J7 VOUT1 and VOUT2 Channel outputs that go to the desired loading conditions.
J6, J8 GND Ground connections.
VDD VDD Used when an external VDD is desired. In this case, the J3 jumper must not be
populated.
The motherboard EVM also has the following digital interfaces.
Table 2-3. Digital Interfaces
Identifier Description
J11 USB connection to host that is used to communicate with the Smart Fuse Configurator software. Note that the 3.3V power
supply for the MCU is derived from USB via a 3.3V LDO.
J12 Used if an external SPI primary device wants to be used. In this scenario, connect the SPI primary device to the signals
on this header and keep the USB port unplugged.
J13 JTAG used for programming the TM4C microcontroller. A source code package is provided, or the user can write their
own MCU code from scratch.
2.4 Test Points
The HSS-HCMOTHERBRDEVM has the following test points available:
Table 2-4. Test Points
Identifier Description
VBB Power source of the device
VOUT1 and VOUT2 Outputs to the desired loads
GND Ground connection
VDD Connection to the digital supply for the high-side switch. This can also be used to supply an external VDD supply if
the buck converter is disabled via the J10 header.
FLT, DI, LHI Probe points for the digital signals of the high-side switch. FLT is an open drain output with a pull-up resistor
connected to the MCU's 3.3V rail.
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3 Software
3.1 Software Usage
The Smart Fuse Configurator software is a companion software used to accompany the HSS-
HCMOTHERBRDEVM and corresponding daughter cards. This software can be downloaded from the product
page of the HSS-HCMOTHERBRDEVM and comes in the format of a packaged zip file. Simply unzip the
downloaded package and open the software on a Windows host machine. As the EVM uses USB-HID, there are
no drivers that are required to be installed and Windows automatically detects/installs the EVM without the need
to download proprietary software packages. The sections below describe the functionality of the Smart Fuse
Configurator in detail.
3.1.1 Command Center View
The Command Center View is meant to provide quick access to some of the common configuration and run-time
settings of the attached high-side switch. The user has the ability to turn on/off individual channels, plot/graph
ADC readings such as current sense, configure PWM settings, and put the device into several diagnostic states.
Note that by default, the device is set to auto-persist changes made in the GUI. This means that when the user
changes a setting on the interface, the command is sent through USB and translated as a SPI command to
persist to the high-side switch.
To enable/disable individual channels, simply click the desired channel in the Channel Enable box. This causes
the corresponding channel to turn on and conduct current if there is a load on the output. Likewise, to enable
current sense/graphing for a particular channel, click the desired channel on the Graph Settings box. This
causes the GUI to start a polling thread that periodically reads the high-side switch of the current sense register.
When a channel is enabled for graphing, the microcontroller automatically enables the relevant ADC bits in the
register settings.
Figure 3-1. Current Sense Graph
Note that by default the device is set to collect and average a specified number of values before plotting them
on the graph. The maximum number of samples to collect can be changed through the Count setting and the
averaged number of samples can be changed with the Avg setting. In addition to load current, the device can
also be configured to graph/report FET temperature and output voltage. This setting is changed through the
Source box.
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Figure 3-2. Voltage Graphing
The Quick Commands box provides various settings/diagnostic commands. The LPM exit current can quickly
be configured per-channel and the device can be forced into low-power mode through the Low-Power Mode
box. Once in low-power mode, if the load current on a corresponding channel exceeds what is configured in the
settings the device exits the low-power mode (or if the low-power mode box is unchecked). Refer to the device
data sheet (SLVSGY2) for exact operation behavior for low-power mode.
The Force Limp Home box forces the device to enter a limp home mode state. Generally, external circuitry is
designed to trigger the LHI pin of the high-side switch when a system-wide fault occurs, however for evaluation
purposes the Force Limp Home box causes the MCU to force trigger the LHI pin of the high-side switch. This
causes the device to default to the state configured in the device configuration registers of the high-side switch
(see the data sheet for details).
The Sleep Mode button prompts a dialog to put the device in sleep mode. In sleep mode, the device enters an
inactive state with minimal power consumption. In this mode, all device configurations are reset to their reset
values. The Smart Fuse Configurator software, however, has logic that restores the configured values after sleep
mode is exited. By clicking the sleep mode button, a prompt occurs to warn the user about the state change:
Figure 3-3. Enter Sleep Mode
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