TinyLily Motor Board

When TI came out with the world's smallest DC motor driver chip, we knew we had to build a board around it. Based around the 2mm x 2mm TI DRV8837 Motor Driver (H-Bridge) IC, this board is incredibly tiny at only 10mm in diameter, yet can drive a 5V 1.8Amp motor! The DRV8837 is extremely easy to use and interface to your favorite processor board (such as a TinyDuino, TinyLily or a standard Arduino), and uses a simple PWM to control motor speed, direction, coasting and braking. The board includes a bypass capacitors and all the I/O of the DRV8837 brought out to sewtabs, as well as heatsinking the chip to a large plane on the bottom side of the board to help with heat dissipation.

The TI DRV8837 has one H-bridge driver consisting of N-channel power MOSFETs to drive a DC motor or one winding of a stepper motor, or other devices like solenoids. An internal charge pump generates needed gate-drive voltages. There are internal shutdown functions for overcurrent protection, short-circuit protection, undervoltage lockout and over temperature. The DRV8837 can supply up to 1.8 A of output current. It operates on a motor power-supply voltage from 1.8 V to 11 V, and a device power-supply voltage of 1.8 V to 7 V. There is also a extremely low power sleep mode with 120nA sleep current.

• Washable
• Eight Sewtabs - 1.2mm in diameter, easy to use with standard conductive thread and needles
• Robust Gold Finish - makes soldering easy and is non-corrosive
• Ultra compact size and weight
  • Dimensions: 10mm diameter (0.394 inches)
  • Max Height: 1.41mm (0.056 inches)
  • Ultra-thin 0.61mm (0.024 inches) PCB
  • Weight: TBD grams (TBD ounces)
• TI DRV8837 H-bridge motor driver
  • Low MOSFET On-Resistance: HS + LS 280mOhm
  • 1.8A Max Drive Current
  • 1.8V to 11V Motor Operating Supply Voltage Range
  • Seperate Motor and Logic Power Supply Pins
  • PWM (IN/IN) Interface
  • Dedicated Sleep Pin

TI DRV8837 Motor Driver Datasheet

• Schematic (pdf)

• Eagle Design Files (on GitHub)

License

Design by TinyCircuits. All design files are released under the Creative Commons Attribution Share-Alike 3.0 License, see the following link for details: http://creativecommons.org/licenses/by-sa/3.0

All text above must be included in any redistribution or derived design

This project uses designs and concepts developed as part of the Arduino project and the LilyPad project. The TinyCircuits design files themselves (schematics, PCB and libraries) are not directly derived from these works' design files and have been created new, however the concepts and basic architecture behind the TinyDuino and TinyLily products are derived and we thank the hard work of the organizations below for their contributions to open-source hardware:

Original Arduino Uno Design by Team Arduino

LilyPad Arduino Design by Leah Buechley and Sparkfun Electronics

Please support the open-source hardware community