MAX14870 Single Brushed DC Motor Driver Carrier
The MAX14870 from Maxim Integrated is a tiny H-bridge motor driver IC that can be used for bidirectional control of one brushed DC motor at 4.5V to 36V. It can supply up to about 1.7A continuously and can tolerate peak currents up to 2.5A for a few seconds, making it a good choice for small motors that run on a wide range of voltages. The MAX14870 is a great IC, but its small surface-mount package makes it difficult for the typical student or hobbyist to use; our breakout board makes it easy to use with standard solderless breadboards and 0.1″ perfboards. Since this board is a carrier for the MAX14870, we recommend careful reading of the MAX14870 datasheet (492k pdf). The board ships populated with SMD components, including the MAX14870 and a reverse battery protection circuit.
We also carry a dual MAX14870 motor driver shield that makes it easy to incorporate this great driver into an Arduino project, as well as a dual MAX14870 motor driver for the Raspberry Pi (available with connectors included but not soldered or with connectors soldered for use with a Raspberry Pi).
For similar motor drivers that operate at lower voltages, consider our BD65496MUV and DRV8838 motor driver carriers.
Features
- Single-channel H-bridge motor driver with shoot-through protection and internal free-wheeling diodes (can drive one DC motor)
- Motor supply voltage: 4.5V to 36V
- Output current: up to 1.7A continuous (2.5A peak)
- No separate logic supply needed; inputs are 3V- and 5V-compatible
- Simple two-pin DIR/PWM interface (one pin controls direction and another controls speed)
- Under-voltage lockout and protection against over-current/short-circuit and over-temperature
- Carrier board adds reverse-voltage protection
- Active-low fault output indicates over-current or over-temperature condition
- Surface-mount resistor can optionally be added to enable automatic current limiting
- Compact size (0.6″×0.5″)
Included hardware
Two 1×5-pin breakaway 0.1″ male headers are included with the MAX14870 motor driver carrier, which can be soldered in to use the driver with breadboards, perfboards, or 0.1″ female connectors. (The headers might ship as a single 1×10 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.
Dimensions
| Size: | 0.6″ × 0.5″1 |
|---|---|
| Weight: | 0.5 g1 |
General specifications
| Motor driver: | MAX14870 |
|---|---|
| Motor channels: | 1 |
| Minimum operating voltage: | 4.5 V |
| Maximum operating voltage: | 36 V |
| Continuous output current per channel: | 1.7 A2 |
| Peak output current per channel: | 2.5 A |
| Maximum PWM frequency: | 50 kHz |
| Reverse voltage protection?: | Y |
Notes:
- Without included hardware.
- Typical results with VIN=12V and 100% duty cycle at room temperature.
File downloads
- Maxim Integrated MAX14870 DC motor driver datasheet (492k pdf)
- MAX14870 single brushed DC motor driver carrier schematic diagram (138k pdf)
- Printable schematic for the MAX14870 single brushed DC motor driver carrier.
- Dimension diagram of the MAX14870 Single Brushed DC Motor Driver Carrier (280k pdf)
- 3D model of the MAX14870 Single Brushed DC Motor Driver Carrier (3MB step)
- Drill guide for MAX14870 Single Brushed DC Motor Driver Carrier (22k dxf)
- This DXF drawing shows the locations of all of the board’s holes.