Mikroelektronika d.o.o.
DC-Motor 21 Click-Platine
DC-Motor 21 Click-Platine
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Der Gleichstrommotor 21 Click Board™ ist eine kompakte Zusatzplatine, die einen bürstenbehafteten Gleichstrommotortreiber enthält. Diese Platine enthält den A3910, einen Gleichstrommotortreiber von Allegro Microsystems, der für Niederspannungsanwendungen entwickelt wurde. Er wird über mehrere GPIO-Pins gesteuert und verfügt über einen weiten Betriebsspannungsbereich mit einer Ausgangsstromkapazität von 500 mA. Neben der Möglichkeit, ihn in der Vollbrückenkonfiguration zum Antrieb eines einzelnen bidirektionalen Gleichstrommotors zu verwenden, kann er auch als duale Halbbrücke zum Antrieb von zwei Gleichstrommotoren verwendet werden. Die Verwendung eines integrierten MOS-Schalters verbessert die Bremswirkung des Motors im Vergleich zur Implementierung mit einer einfachen Klemmdiode. Darüber hinaus verfügt er auch über integrierte Schutzfunktionen wie Überstromschutz und thermische Abschaltung.
Das DC Motor 21 Click Board™ ist für den Antrieb von Gleichstrommotoren mit Bürsten geeignet und zielt auf den Verbraucher- und Industriemarkt mit Endanwendungen für Niederspannungsgeräte ab.
How Does The DC Motor 21 Click Board™ Work?
The DC Motor 21 Click Board™ is based on the A3910, a dual half-bridge motor driver designed for low voltage power applications from Allegro Microsystems. The DC Motor 21 Click Board™ is controlled via several GPIO pins of the mikroBUS™ socket and has a wide operating voltage range with an output current capacity of 500mA maximum. The integrated MOSFETs, which configures a half-bridge circuit inside the A3910, provide the possibility to drive dual DC motors but also allow to be used in the full-bridge configuration to drive a single bidirectional DC motor. Thanks to its plane features and benefits, the DC Motor 21 Click Board™ is targeted at the consumer market with end applications to low voltage equipment.
Using an integrated MOS switch improves braking action for the motor, compared to implementation with a simple clamp diode. Besides, it also features built-in protection such as crossover current and thermal shutdown protection, alongside "Sleep" Standby mode with zero drain-current.
As mentioned in the product description, the DC Motor 21 Click Board™ communicates with MCU using several GPIO pins. To turn ON the internal MOSFETs of the A3910, they need to be switched by the logic level, which is input to the control input pins: HN1, LN1, HN2, and LN2 pins routed to the AN, CS, PWM, and INT pins of the mikroBUS™ socket. Thereby, the Drive/Break/Coast/Sleep motor functions can be selected according to the state of its input control signals.
The DC Motor 21 Click Board™ can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use communication lines properly. However, the 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.
SPECIFICATIONS
| Type | Brushed |
| Applications | Can be used for driving DC brushed motors and targeted at the consumer and industrial market with end applications to low voltage equipment |
| On-board modules | A3910 - dual half-bridge motor driver designed for low voltage power applications from Allegro Microsystems |
| Key Features | Low power consumption, full- and half-bridge configuration, low rds, Standby mode with zero drain-current, crossover and thermal shutdown protection, and more |
| Interface | GPIO |
| Compatibility | mikroBUS |
| Click board size | S (28.6 x 25.4 mm) |
| Input Voltage | 3.3V or 5V |
PINOUT DIAGRAM
This table shows how the pinout on the DC Motor 21 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
| Notes | Pin |  |
Pin | Notes | |||
|---|---|---|---|---|---|---|---|
| Motor 1 Control Input | HN1 | 1 | AN | PWM | 16 | HN2 | Motor 2 Control Input |
| NC | 2 | RST | INT | 15 | LN2 | Motor 2 Control Input | |
| Motor 1 Control Input | LN1 | 3 | CS | RX | 14 | NC | |
| NC | 4 | SCK | TX | 13 | NC | ||
| NC | 5 | MISO | SCL | 12 | NC | ||
| NC | 6 | MOSI | SDA | 11 | NC | ||
| Power Supply | 3.3V | 7 | 3.3V | 5V | 10 | 5V | Power Supply |
| Ground | GND | 8 | GND | GND | 9 | GND | Ground |
ONBOARD SETTINGS AND INDICATORS
| Label | Name | Default | Description |
|---|---|---|---|
| LD1 | PWR | - | Power LED Indicator |
| JP1 | VCC SEL | Left | Logic Level Voltage Selection 3V3/5V: Left position 3V3, Right position 5V |
DC MOTOR 21 CLICK ELECTRICAL SPECIFICATIONS
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 3.3 | - | 5 | V |
| Maximum Output Current | - | - | 500 | mA |
| Operating Temperature Range | -40 | +25 | +85 | °C |
Software Support
We provide a library for the DC Motor 21 Click Board™ as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
The package can be downloaded/installed directly from NECTO Studio Package Manager (recommended), downloaded from our LibStock™ or found on Mikroe Github account.
Library Description
This library contains API for the DC Motor 21 Click Board™ driver.
Key functions
-
dcmotor21_set_out_1This function sets the state of output 1. -
dcmotor21_set_out_2This function sets the state of output 2.
Example Description
This example demonstrates the use of the DC Motor 21 Click Board™.
void application_task ( void )
{
dcmotor21_set_out_1 ( &dcmotor21, DCMOTOR21_OUT_LOW );
dcmotor21_set_out_2 ( &dcmotor21, DCMOTOR21_OUT_HIGH );
log_printf( &logger, " rn Driving the motor...rn" );
Delay_ms( 2000 );
dcmotor21_set_out_1 ( &dcmotor21, DCMOTOR21_OUT_HIGH );
dcmotor21_set_out_2 ( &dcmotor21, DCMOTOR21_OUT_LOW );
log_printf( &logger, " Switch direction.rn" );
Delay_ms( 2000 );
dcmotor21_set_out_1 ( &dcmotor21, DCMOTOR21_OUT_HIGH_Z );
dcmotor21_set_out_2 ( &dcmotor21, DCMOTOR21_OUT_HIGH_Z );
log_printf( &logger, " The motor is disconnected.rn" );
Delay_ms( 2000 );
}
The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager (recommended), downloaded from our LibStock™ or found on Mikroe Github account.
Other Mikroe Libraries used in the example:
- MikroSDK.Board
- MikroSDK.Log
- Click.DCMotor21
Additional Notes and Information
Depending on the development board you are using, you may need a 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. UART terminal is available in all MikroElektronika compilers.
MIKROSDK
The DC Motor 21 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.
DC-Motor 21 Click-Platine
Frequently Asked Questions
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