Control the flow of power to connected load with BTS3035EJXUMA1 and PIC18F57Q43
35mΩ single channel smart low-side power switch
Published Nov 21, 2024
Click board™
SolidSwitch 8 Click
Dev Board
Curiosity Nano with PIC18F57Q43
Compiler
NECTO Studio
MCU
PIC18F57Q43
Manage loads reliably with advanced protection and diagnostics, ideal for replacing relays and fuses in automotive and industrial systems
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Hardware Overview
How does it work?
SolidSwitch 8 Click is based on the BTS3035EJXUMA1, a single-channel smart low-side power switch from Infineon. This 35mΩ device uses an advanced N-channel vertical power MOSFET design, which is monolithically integrated, ensuring high reliability and compactness. Engineered with automotive-grade quality, the BTS3035EJXUMA1 is ideal for robust 12V automotive applications. Still, it can manage a versatile range of load types - including resistive, inductive, and capacitive loads - with a maximum voltage range from 6V to 18V and load currents up to 5A. This Click board™ offers a practical solution for controlling loads with varying characteristics and can replace traditional electromechanical relays, fuses, and discrete circuits in numerous applications. Its design enables reliable switching and precise load management, making it suitable for high-efficiency automotive and industrial
systems. The BTS3035EJXUMA1 has comprehensive protection features, enhancing its reliability across various applications. These include an overtemperature shutdown with automatic restart, active clamp overvoltage protection, and current limitation, all safeguarding the device under demanding operating conditions. Additionally, it has a low output leakage current when in the OFF state, electrostatic discharge (ESD) protection, and full AEC-Q100 qualification, ensuring resilience in automotive environments. SolidSwitch 8 Click establishes its connection with the host MCU through specific pins on the mikroBUS™ socket, which controls the operation of the onboard BTS3035EJXUMA1 IC. The IN pin is the TTL logic control signal, where a HIGH logic level enables the smart power switch to manage its load. Additionally, the STS pin functions as an open-drain feedback status output, providing real-
time monitoring and alerting the MCU in case of detected anomalies, such as an overtemperature condition. For immediate visual feedback, the onboard ERR red LED indicates any detected operational anomaly controlled through the ERR pin on the mikroBUS™ socket. This LED activation provides an accessible visual alert for users, enhancing diagnostics and safety by signaling issues directly on the board. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VIO SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used as a reference for further development.
Features overview
Development board
PIC18F57Q43 Curiosity Nano evaluation kit is a cutting-edge hardware platform designed to evaluate microcontrollers within the PIC18-Q43 family. Central to its design is the inclusion of the powerful PIC18F57Q43 microcontroller (MCU), offering advanced functionalities and robust performance. Key features of this evaluation kit include a yellow user LED and a responsive
mechanical user switch, providing seamless interaction and testing. The provision for a 32.768kHz crystal footprint ensures precision timing capabilities. With an onboard debugger boasting a green power and status LED, programming and debugging become intuitive and efficient. Further enhancing its utility is the Virtual serial port (CDC) and a debug GPIO channel (DGI
GPIO), offering extensive connectivity options. Powered via USB, this kit boasts an adjustable target voltage feature facilitated by the MIC5353 LDO regulator, ensuring stable operation with an output voltage ranging from 1.8V to 5.1V, with a maximum output current of 500mA, subject to ambient temperature and voltage constraints.
Microcontroller Overview
MCU Card / MCU
Architecture
PIC
MCU Memory (KB)
128
Silicon Vendor
Microchip
Pin count
48
RAM (Bytes)
8196
You complete me!
Accessories
Curiosity Nano Base for Click boards is a versatile hardware extension platform created to streamline the integration between Curiosity Nano kits and extension boards, tailored explicitly for the mikroBUS™-standardized Click boards and Xplained Pro extension boards. This innovative base board (shield) offers seamless connectivity and expansion possibilities, simplifying experimentation and development. Key features include USB power compatibility from the Curiosity Nano kit, alongside an alternative external power input option for enhanced flexibility. The onboard Li-Ion/LiPo charger and management circuit ensure smooth operation for battery-powered applications, simplifying usage and management. Moreover, the base incorporates a fixed 3.3V PSU dedicated to target and mikroBUS™ power rails, alongside a fixed 5.0V boost converter catering to 5V power rails of mikroBUS™ sockets, providing stable power delivery for various connected devices.
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Click board™ Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the Curiosity Nano with PIC18F57Q43 as your development board.
Track your results in real time
Application Output
This Click board can be interfaced and monitored in two ways:
Application Output- Use the "Application Output" window in Debug mode for real-time data monitoring. Set it up properly by following this tutorial.
UART Terminal- Monitor data via the UART Terminal using a USB to UART converter. For detailed instructions, check out this tutorial.
Software Support
Library Description
This library contains API for SolidSwitch 8 Click driver.
Key functions:
solidswitch8_set_err_pin- This function sets the err pin state to the selected level of SolidSwitch 8 Click.solidswitch8_set_in_pin- This function sets the in pin state to the selected level of SolidSwitch 8 Click.solidswitch8_get_sts_pin- This function reads the state of the status pin of SolidSwitch 8 Click.
Open Source
Code example
The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.
/*!
* @file main.c
* @brief SolidSwitch 8 Click Example.
*
* # Description
* This example demonstrates the use of SolidSwitch 8 Click board by
* switching state of the switch.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initializes the driver, performs the Click default configuration.
*
* ## Application Task
* Switching state of the output every 5 seconds,
* and monitoring the status of the device.
*
* @author Stefan Ilic
*
*/
#include "board.h"
#include "log.h"
#include "solidswitch8.h"
static solidswitch8_t solidswitch8; /**< SolidSwitch 8 Click driver object. */
static log_t logger; /**< Logger object. */
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
solidswitch8_cfg_t solidswitch8_cfg; /**< Click config object. */
/**
* Logger initialization.
* Default baud rate: 115200
* Default log level: LOG_LEVEL_DEBUG
* @note If USB_UART_RX and USB_UART_TX
* are defined as HAL_PIN_NC, you will
* need to define them manually for log to work.
* See @b LOG_MAP_USB_UART macro definition for detailed explanation.
*/
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
solidswitch8_cfg_setup( &solidswitch8_cfg );
SOLIDSWITCH8_MAP_MIKROBUS( solidswitch8_cfg, MIKROBUS_1 );
if ( DIGITAL_OUT_UNSUPPORTED_PIN == solidswitch8_init( &solidswitch8, &solidswitch8_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
solidswitch8_default_cfg ( &solidswitch8 );
log_info( &logger, " Application Task " );
}
void application_task ( void )
{
if ( SOLIDSWITCH8_PIN_STATE_LOW == solidswitch8_get_sts_pin( &solidswitch8 ) )
{
solidswitch8_set_err_pin( &solidswitch8, SOLIDSWITCH8_PIN_STATE_HIGH );
log_error( &logger, " Detected over temperature condition." );
for ( ; ; );
}
log_printf( &logger, " Switch state closed. \r\n" );
solidswitch8_set_in_pin( &solidswitch8, SOLIDSWITCH8_PIN_STATE_HIGH );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
log_printf( &logger, " Switch state open. \r\n" );
solidswitch8_set_in_pin( &solidswitch8, SOLIDSWITCH8_PIN_STATE_LOW );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
}
int main ( void )
{
/* Do not remove this line or clock might not be set correctly. */
#ifdef PREINIT_SUPPORTED
preinit();
#endif
application_init( );
for ( ; ; )
{
application_task( );
}
return 0;
}
// ------------------------------------------------------------------------ END
