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DRV8835 Dual Motor Driver Carrier

DRV8835 Dual Motor Driver Carrier
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CHF 8,00

zzgl. Versandkosten

Lieferzeit: Lager

Art.Nr.: MD-POL-2135
Für weitere Informationen besuchen Sie bitte die Homepage zu diesem Artikel.

DRV8835 Dual Motor Driver Carrier

This tiny breakout board for TI’s DRV8835 dual motor driver can deliver 1.2 A per channel continuously (1.5 A peak) to a pair of DC motors, and it supports two possible control interfaces for added flexibility of use: IN/IN and PHASE/ENABLE. With an operating voltage range from 0 V to 11 V and built-in protection against reverse-voltage, under-voltage, over-current, and over-temperature, this driver is a great solution for powering up to two small, low-voltage motors. The carrier board has the form factor of a 14-pin DIP package, which makes it easy to use with standard solderless breadboards and 0.1″ perfboards.

Texas Instruments’ DRV8835 is a tiny dual H-bridge motor driver IC that can be used for bidirectional control of two brushed DC motors at 0 V to 11 V. It can supply up to about 1.2 A per channel continuously and can tolerate peak currents up to 1.5 A per channel for a few seconds, making it an ideal driver for small motors that run on relatively low voltages. The DRV8835 is a great IC, but its small, leadless package makes it difficult for the typical student or hobbyist to use; our breakout board gives this driver the form factor of a 14-pin DIP package, which makes it easy to use with standard solderless breadboards and 0.1″perfboards. Since this board is a carrier for the DRV8835, we recommend careful reading of the DRV8835 datasheet (1MB pdf). The board ships populated with SMD components, including the DRV8835, and adds a FET for reverse battery protection.

Features

  • Dual-H-bridge motor driver: can drive two DC motors or one bipolar stepper motor
  • Motor supply voltage: 0 V to 11 V
  • Logic supply voltage: 2 V to 7 V
  • Output current: 1.2 A continuous (1.5 A peak) per motor
  • Motor outputs can be paralleled to deliver 2.4 A continuous (3 A peak) to a single motor
  • Two possible interface modes: IN/IN (outputs mostly mirror inputs) or PHASE/ENABLE (one pin for direction and another for speed)
  • Inputs are 3V- and 5V-compatible
  • Under-voltage lockout on the logic supply and protection against over-current and over-temperature
  • Reverse-voltage protection on the motor supply
  • Compact size (0.7″×0.4″) with the form factor of a 14-pin DIP package

Included hardware

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Two 1×7-pin breakaway 0.1″ male headers are included with the DRV8835 dual motor driver carrier, which can be soldered in to use the driver with breadboardsperfboards, or 0.1″ female connectors. (The headers might ship as a single 1×14 piece that can be broken in half.) The right picture above shows the two possible board orientations when used with these header pins (parts visible or silkscreen visible). You can also solder your motor leads and other connections directly to the board.

Using the motor driver

 

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Minimal wiring diagram for connecting a microcontroller to a DRV8835 dual motor driver carrier in phase-enable mode.

 

Motor and motor power connections are made on one side of the board and logic power and control connections are made on the other. The driver requires a motor voltage between 0 V and 11 V to be supplied to the VIN or VMM pin and a logic voltage between 1.8 V and 7 V to be supplied to the VCC pin; the logic voltage can typically be supplied by or shared with the controlling device. The VIN pin is the reverse-protected motor supply input and is the recommended point for connecting motor power. However, driver performance will start getting worse when the input voltage to the reverse-protection circuit is below a few volts, and 1.5 V is the lower limit of where the VIN pin can be used. For very low voltage applications, the motor supply should be connected directly to VMM, which bypasses the reverse-protection circuit.

The DRV8835 features two possible control modes: IN/IN and PHASE/ENABLE. The MODE pin determines the control interface. Each control input is pulled low through a weak pull-down resistor (approximately 100 kΩ), so the driver will be in the IN/IN mode if the MODE pin is left disconnected, and the driver outputs will be disabled by default. Setting the MODE pin high, either with a pull-up resistor or a driving-high I/O line, sets the driver to PHASE/ENABLE mode, where the PHASE pin determines the motor direction and the ENABLE pin can be supplied with a PWM signal to control the motor speed. This mode is generally easier to use as it only requires one PWM per channel, but it only allows for drive/brake operation. (Drive/brake operation usually provides a more linear relationship between PWM duty cycle and motor speed than drive/coast operation, and we generally recommend using drive/brake operation when possible.)

Simplified drive/brake operation with MODE=1 (PHASE/ENABLE)
xPHASE xENABLE xOUT1 xOUT2 operating mode
0 PWM PWM L forward/brake at speed PWM %
1 PWM L PWM reverse/brake at speed PWM %
X 0 L L brake low (outputs shorted to ground)

 

When the MODE pin is disconnected or low, the control interface is IN/IN, which allows for slightly more advanced control options. The following truth table show how to achieve drive/coast and drive/brake operation using the IN/IN control interface:

Drive/coast or drive/brake operation with MODE=0 (IN/IN)
xIN1 xIN2 xOUT1 xOUT2 operating mode
0 0 OPEN OPEN coast (outputs off)
PWM 0 PWM L forward/coast at speed PWM %
0 PWM L PWM reverse/coast at speed PWM %
1 PWM PWM L forward/brake at speed 100% − PWM %
PWM 1 L PWM reverse/brake at speed 100% − PWM %
1 1 L L brake low (outputs shorted to ground)

 

 

 

This product can get hot enough to burn you long before the chip overheats. Take care when handling this product and other components connected to it.

 

 

DRV8835 Dual Motor Driver Carrier DRV8835 Dual Motor Driver Carrier

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Diesen Artikel haben wir am Sunday, 01. March 2015 in unseren Katalog aufgenommen.

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