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RAK17000 WisBlock Motor Control Module Datasheet

Overview​

Description​

The RAK17000 is a DC motor driver module. It can be mounted to the IO Slot of the WisBlock Base of your choice. It can drive one stepper motor or two DC motors. The RAK17000 module uses the DRV8833 motor driver IC from Texas Instruments.

Features​

  • Drive two DC motors or one stepper motor
  • Wide power supply voltage range: 2.7 to 10.8 V
  • Motor power supply can be from an external source or from the WisBlock Base battery
  • Output current control
  • Selection of power source can be done via 2.54 mm 2-pin jumper
  • Chipset: Texas Instruments DRV8833
  • Module size: 25X35 mm

Applications​

  • Battery-Powered Mechanical Devices
  • Automation Machines
  • Robotics

Specifications​

Overview​

Mounting​

The RAK17000 module can be mounted to the slots IO of the WisBlock Base board. Figure 1 shows the mounting mechanism of the RAK17000 on a WisBlock Base module, such as the RAK5005-O.

Figure 3849: RAK17000 WisBlock Motor Drive Module Mounting

Hardware​

The hardware specification is categorized into five parts. It shows the chipset of the module and discusses the pinouts and the corresponding functions and diagrams of the module. It also covers the electrical and mechanical characteristics that include the tabular data of the functionalities and standard values of the RAK17000 WisBlock Motor Drive Module.

Chipset​

The RAK17000 motor drive module uses DRV8833 from Texas Instruments.

VendorPart Number
Texas InstrumentsDRV8833

Pin Definition​

The RAK17000 WisBlock motor drive module comprises a standard WisBlock connector for the IO slot. The WisBlock connector allows the RAK17000 module to be mounted on a WisBlock Base Board, such as RAK5005-O. The pin order of the connector and the pinout definition is shown in Figure 2.

NOTE
  • Bridge A and B input related pins, nSLEEP，VBAT, and GND are connected to this connector.
  • nSLEEP enable pin, high active, internal pull-down, low-power sleep mode
Figure 3850: RAK17000 WisBlock Motor Drive Module Pinout

Electrical Characteristics​

Recommended Operating Conditions​
SymbolDescriptionMin.Nom.Max.Unit
VMDevice power supply (Motor and Driver IC)2.7-10.8V
VDIGINDigital input pin voltage range-0.3-5.75V
IOUTOutput current per bridge--0.85A
IVMVM sleep mode supply current-1.62.5uA

Mechanical Characteristics​

Board Dimensions​

Figure 3 shows the dimensions and the mechanic drawing of the RAK17000 module.

Figure 3851: RAK17000 WisBlock Motor Control Module Mechanical Drawing
WisConnector PCB Layout​
Figure 3852: WisConnector PCB Footprint and Recommendations

Schematic Diagram​

Motor Drive​

Figure 5 shows RAK17000 motor drive schematic. VM is the motor power supply that has a range from 2.7 V to 10.8 V. It can change the motor current through modifying the R4, R5, R8, or R9. Default max output current is 0.85 A.

Figure 3853: RAK17000 WisBlock Motor Drive schematic
Power Supply Switch​

The power source of the motor can be selected via the 2.54 mm pitch jumper as shown in Figure 6. It can be from the battery of the WisBlock Base or via the external input voltage in the RAK17000 terminal. This is also the power source of the Driver IC. The max voltage input is 10.8 V.

Figure 3854: RAK17000 Wisblock Power Supply Switch