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MIKROE-4569
20 g
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SolidSwitch Click is a compact add-on board that contains load switch devices. This board features the TPS22918, four single-channel load switches from Texas Instruments. Every switch includes an N-channel MOSFET that operates over an input voltage range up to 5.5V and can support a maximum continuous current of 2 A. The switches are controlled by an ON/OFF input, performed by MAX7323, an I2C configurable port expander capable of interfacing directly with low-voltage control signals. This Click board™ is suitable for industrial systems, set-top boxes, electronic point of scale, and various other applications.
SolidSwitch Click is supported by a mikroSDK compliant library, which includes functions that simplify software development. This Click board™ comes as a fully tested product, ready to be used on a system equipped with the mikroBUS™ socket.
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SolidSwitch Click, as its foundation, uses the TPS22918, a 5.5V 2A load switch from Texas Instruments. To reduce voltage drop for low voltage and high current rails, every TPS22918 implements a low resistance N-channel MOSFET, reducing the drop-out voltage across the device. An ON/OFF input on the ON pin of the TPS22918 controls the switches. The ON pin is compatible with the standard GPIO logic threshold and can be used with any MCU with 1V or higher GPIO voltage. That’s why the control of all switches is established via the port expander, the MAX7323.
This Click board™ is designed to operate from an external supply voltage range from 1V to 5.5V. The TPS22918 works regardless of power sequencing order. The order in which voltages are applied to the VIN terminal and ON pin of the load switch will not damage the device as long as the voltages do not exceed the absolute maximum operating conditions.
SolidSwitch Click communicates with MCU through the MAX7323 port expander using the standard I2C 2-Wire interface with a frequency of up to 400kHz. It also has two address pins (A0 and A1) programmed by the user to determine the value of the last two LSBs of the slave address, selected by onboard SMD jumpers labeled as ADDR SEL to an appropriate position marked as 0 and 1, allowing selection of the slave address LSBs. Also, this Click board™ has a Reset pin, routed to the RST pin on the mikroBUS™ socket, which clears the serial interface in case of a bus lockup, terminating any serial transaction to or from the MAX7323.
Also, it uses an additional pin, the INT pin of the mikroBUS™ socket, which automatically flags data changes on any of the I/O ports of the MAX7323 used as inputs. The interrupt output INT and all transition flags are deasserted when the MAX7323 is accessed through the serial interface.
This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before use with MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used, as a reference, for further development.
Type
Relay
Applications
Can be used for industrial systems, set-top boxes, electronic point of scale, and various other applications.
On-board modules
TPS22918 - 5.5V 2A load switch from Texas Instruments
Key Features
Four integrated single channel load switches, flexible design, 2A maximum switch current, and more.
Interface
I2C
Feature
No ClickID
Compatibility
mikroBUS™
Click board size
M (42.9 x 25.4 mm)
Input Voltage
3.3V,External
This table shows how the pinout on SolidSwitch Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
Label | Name | Default | Description |
---|---|---|---|
LD1 | PWR | - | Power LED Indicator |
JP1-JP2 | ADDR SEL | Left | I2C Address Selection 0/1: Left position 0, Right position 1 |
Description | Min | Typ | Max | Unit |
---|---|---|---|---|
Supply Voltage VCC | - | 3.3 | - | V |
Supply Voltage VIN | 1 | - | 5.5 | V |
Maximum Output Current | - | - | 2 | A |
Maximum On-Resistance | - | - | 52 | mΩ |
Operating Temperature Range | -40 | +25 | +105 | °C |
We provide a library for the SolidSwitch Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
Package can be downloaded/installed directly from NECTO Studio Package Manager (recommended way), downloaded from our LibStock™ or found on mikroE github account.
Library Description
This library contains API for SolidSwitch Click driver.
Key functions:
solidswitch_cfg_setup
- Config Object Initialization function.solidswitch_init
- Initialization function.solidswitch_default_cfg
- Click Default Configuration function.Examples description
This example demonstrates the use of SolidSwitch Click board™.
The demo application is composed of two sections :
void application_task ( void ) { solidswitch_write_single ( &solidswitch, SOLIDSWITCH_ENABLE_OUT0 | SOLIDSWITCH_ENABLE_OUT1 ); solidswitch_display_enabled_channels( ); Delay_ms ( 3000 ); solidswitch_write_single ( &solidswitch, SOLIDSWITCH_ENABLE_OUT6 | SOLIDSWITCH_ENABLE_OUT7 ); solidswitch_display_enabled_channels( ); Delay_ms ( 3000 ); solidswitch_write_single ( &solidswitch, SOLIDSWITCH_ENABLE_ALL_OUTPUTS ); solidswitch_display_enabled_channels( ); Delay_ms ( 3000 ); solidswitch_write_single ( &solidswitch, SOLIDSWITCH_DISABLE_ALL_OUTPUTS ); solidswitch_display_enabled_channels( ); Delay_ms ( 3000 ); }
The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on mikroE github account.
Other mikroE Libraries used in the example:
Additional notes and informations
Depending on the development board you are using, you may need USB UART click, USB UART 2 click or RS232 click to connect to your PC, for development systems with no UART to USB interface available on the board. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.
This Click board™ is supported with mikroSDK - MikroElektronika Software Development Kit. To ensure proper operation of mikroSDK compliant Click board™ demo applications, mikroSDK should be downloaded from the LibStock and installed for the compiler you are using.
For more information about mikroSDK, visit the official page.
NOTE: Please be advised that any peripheral devices or accessories shown connected to the Click board™ are not included in the package. Check their availability in our shop or in the YMAN section below.