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AQMH2403ND DC brushed motor H-bridge
AQMH2403ND DC brushed motor H-bridge
Product details
Functional Features
| ◆ Supports voltage range of 7V to 24V, anti reverse connection |
| ◆ Dual motor interface, each rated output current is 2.5A, and each channel has independent 2.5A overcurrent protection (cannot be protected beyond 6A) |
| ◆ Same logic as the control signal of L298 motor drive chip, each channel supports three wire control enable, forward and reverse rotation, and braking |
| The enable signal can be externally connected to PWM, and the forward and reverse control signals can be connected in series with limit switches |
| The control signal is driven by current injection and supports direct driving of the vast majority of microcontrollers |
| ◆ Use optocouplers to isolate all control signals |
| Extremely small size, only 4.3cm x 3.5cm |
Download link for materials:http://www.akelc.com/download/show_39.html
Principle Overview
This H-bridge module uses gate circuits and MOS transistor combinations to achieve motor forward and reverse rotation, braking, and speed controlIt has both a large output current and a flexible control signal logic similar to L298.
| Interference processing method:Control signal optocoupler isolation, power supply spike voltage suppression. |
| Control signal logic:Implement control logic similar to L298 using gate circuits. |
| H-bridge implementation method:Implement H-bridge using P and N complementary MOS transistors. |
| Motor overcurrent protection:Use self recovering fuses to achieve motor blockage and overcurrent protection. |
Technical Parameter
| project | parameter |
|
Input Voltage |
DC 6.8V～27V |
| Rated input voltage | DC 12V |
| Number of output channels | 2 routes |
| Rated output current of each channel | 2.5A |
| Peak output current of each channel |
6A |
| Rated output power of each channel |
30W (12V power supply) |
| Maximum output power per channel | 60W (24V power supply) |
| Overcurrent protection action current | 2.5～3A |
| Maximum overcurrent protection current | 6A (Exceeding this current may damage the module) |
| Control signal voltage | 3～6.5V |
| Current of each control signal | 3～11mA |
| Minimum effective pulse width of PWM | 5us |
| operation temperature | -25℃～70℃ |
| External dimensions | 4.3cm×3.5cm×1.4cm |
interface definition
Control signal logic
1. Motor interface 1 control signal logic
| IN1 | IN2 | ENA | OUT1 and OUT2 outputs |
| × | × | 0 | No output, OUT1 and OUT2 are suspended |
| 0 | 0 | 1 | Braking, VOUT1=VOUT2=VGND |
| 1 | 0 | 1 | Forward rotation, VOUT1-VOUT2=Power supply voltage |
| 0 | 1 | 1 | reversal, VOUT2-VOUT1=Power supply voltage |
| 1 | 1 | 1 |
Braking, VOUT1=VOUT2=Power supply voltage |
2. Motor interface 2 Control signal logic
| IN3 | IN4 | ENB | OUT3, OUT4 outputs |
| × | × | 0 | No output, OUT3 and OUT4 are suspended |
| 0 | 0 | 1 | Braking, VOUT3=VOUT4=VGND |
| 1 | 0 | 1 | Forward rotation, VOUT3-VOUT4=Power supply voltage |
| 0 | 1 | 1 | reversal, VOUT4-VOUT3=Power supply voltage |
| 1 | 1 | 1 |
Braking, VOUT3=VOUT4=Power supply voltage |
Typical Connection Example
1. Wiring method for controlling motor rotation using a microcontroller
The power supply of the microcontroller and the control signal power supply of the driver board should be grounded together, but not with the motor power supply GND. When using a 5V microcontroller, connect the driver board+5V to the power supply+5V; When using a 3.3V microcontroller, the driver board+5V is connected to a 3.3V power supply. The control signals of the microcontroller and the driver board can share the same power supply or be independently powered (but must be grounded). ENA is connected to a GPIO or PWM output port of the microcontroller. When ENA is at a high level, the drive board is enabled, and forward and reverse rotation or braking are effective. If it is a PWM signal, the motor can be adjusted in speed; When the power is low, the drive board is disabled and the motor interface has no output. IN1 and IN2 are connected to two GPIO ports of the microcontroller (supporting any IO port of the 51 microcontroller without the need for pull-up resistors), controlling the forward and reverse rotation of the motor and braking. The driver logic is shown in the logic table.
2. Method of using buttons to control the forward and reverse adapter wires of the motor
Among them, PB1 and PB2 are two buttons. When PB2 is pressed and PB1 is not pressed, IN1 is at a high level, IN2 is at a low level, and the motor rotates forward; When PB2 is pressed and PB1 is not pressed, IN1 is at a low level, IN2 is at a high level, and the motor reverses; When PB1 and PB2 are both pressed or both bounce up, IN2 and IN2 are both at low or high levels, and the motor brakes (or brakes). The control signal logic is shown in the logic table.
Dimension definition
The dimensions are 4.3cm x 3.5cm x 1.4cm. The installation hole diameter is 3mm, and it is recommended to use M3 screws for fixing. Be careful not to short-circuit the back circuit during installation. You can add insulation pads or use copper pillars to lift the circuit board.
Download link for materials:http://www.akelc.com/download/show_39.html
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