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.

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Smart Fuse Evaluation Module 1

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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Smart Fuse Evaluation Module 3

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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Smart Fuse Evaluation Module 5

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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Smart Fuse Evaluation Module 7

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

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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Smart Fuse Evaluation Module 9

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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