Serial Interface Dual 8-Channel Relay, LED, Stepper Driver
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This reference design includes dual DRV8860 and an MSP430 value line MCU to provide 16-channel low side driver for Relays, LEDs, and Unipolar steppers. The solution suports voltage range from 8V to 38V, 200mA current for each channel, parallel outputs, protection of short condition and open load detection. Serial interface and daisy chain connection of DRV8860 give the most benefits on minimum input IOs and extending the output channels easily. An innovative energizing time and internal automatic PWM duty control provide obvious energy saving function especially for relay and solenoid driving. The PWM duty control also can be used for LED brightness control. Full and half step unipolar stepper motor control logic is also included in this design. The drive stage has integrated protection from short-circuit, under voltage, and over-temperature.

  • Serial interface control to minimize the inputs signal
  • Daisy chain connection to extend output channels easily without increasing inputs IO
  • Wide VM range from 8V to 38V and 200mA for each channel
  • Parallel outputs capability to increase the output current
  • Diagnosis function by reading back output states and OCP/OL faults through serial interface
  • Integrated protection for short-circuit, over-current, under-voltage, and over-temperature

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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
DRV8860  38-V, 0.3-A, octal low-side motor driver with serial control  Motor drivers  Sample & Buy View Design Kits & Evaluation Modules
MSP430F2350  16 MHz MCU with 16KB Flash, 512B SRAM, 10-bit ADC, comparator, UART/SPI/I2C, timer  Microcontrollers (MCUs)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
DRV8860 Download Download
MSP430F2350 Download Download
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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 622 15 Nov 2013
Design files (3)
Title Type Size (KB) Date
ZIP 385 15 Nov 2013
PDF 104 15 Nov 2013
PDF 176 15 Nov 2013

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