DRV8860PWR 8-Channel Serial Low-Side Motor Driver TSSOP-16

DRV8860PWR 8-Channel Serial Low-Side Motor Driver TSSOP-16 is a highly integrated, smart low-side driver solution designed to control multiple inductive loads with precision and efficiency. This device features eight power MOSFET channels capable of driving relays, solenoids, and stepper motors through a simple serial interface. Consequently, engineers can manage high-density peripheral arrays while using only a few pins on their host microcontroller. The integrated daisy-chain capability allows for the synchronization of multiple DRV8860 units, which further simplifies complex system layouts. Furthermore, the chip includes advanced protection features such as overcurrent, short-circuit, and undervoltage lockout to ensure long-term system reliability. Therefore, you should select the DRV8860PWR for any application where space-saving serial control and robust power management are critical requirements.

Key Features:

• 8-Channel Low-Side Drive: Provides eight independent open-drain outputs, each capable of sinking significant current for inductive and resistive loads.
• Serial Interface Control: Uses a standard 3-wire or 4-wire serial interface (similar to SPI) to reduce the necessary GPIO count on the processor.
• Daisy-Chain Support: Allows multiple drivers to connect in a series, enabling the control of dozens of outputs through a single serial bus.
• Fault Diagnostics: Features an open-drain fault output (nFAULT) that signals overcurrent or thermal shutdown events to the host system.
• Integrated Clamp Diodes: Includes internal inductive-kickback protection for each channel, removing the need for external flyback diodes when driving relays.

Technical Specifications:

• Operating Supply Voltage (V_CC): 8 V to 38 V
• Logic Supply Voltage (V_DD): 3 V to 5.5 V
• Maximum Continuous Sink Current: 200 mA per channel (All channels on)
• Peak Current Limit: ≈ 560 mA per channel
• Output RDS(on): Typically 1.5 Ω at 25°C
• Serial Clock Frequency: Up to 8 MHz
• Thermal Shutdown: ≈ +160°C

Mechanical Specifications:

• Package Type: TSSOP-16 (Thin Shrink Small Outline Package)
• Mounting Style: Surface Mount Technology (SMT)
• Lead Finish: Ni/Pd/Au or Matte Tin
• MSL Rating: Level 1 (Unlimited floor life at ≤ 30°C / 85% RH)

Dimensions:

• Body Length: ≈ 5.0 mm
• Body Width (Including Leads): ≈ 6.4 mm
• Body Thickness: ≈ 1.2 mm maximum
• Pin Pitch: 0.65 mm

Pinout and Wiring:

• OUT0 through OUT7: Connect these low-side outputs to the negative terminal of your load (solenoid, motor, or LED).
• SERIN: Connect to the MOSI pin of your microcontroller to receive serial data.
• SCLK: Connect to the serial clock output of your host processor.
• LATCH: Trigger this pin to transfer data from the shift register to the output drivers.
• nFAULT: Connect to an interrupt pin with a pull-up resistor to monitor device health.
• GND: Connect to the common system ground. However, ensure the ground plane is wide enough to dissipate heat effectively.

Datasheet Reference:

• Download Texas Instruments DRV8860PWR Datasheet

Commonly Used in:

• Unipolar Stepper Motors: Driving the coils of 5-wire or 6-wire stepper motors in sequence.
• Industrial PLC Modules: Providing isolated-style switching for multiple 24V DC indicators and relays.
• Gaming Machines: Controlling large arrays of solenoids and lamps through minimized wiring harnesses.

Applications:

• Relay Drivers: Safely switching banks of relays in automation and power distribution systems.
• LED Matrix Control: Managing high-current LED strings that require constant-voltage low-side switching.
• Valve Control: Operating pneumatic or hydraulic valves in robotics and medical equipment.

Equivalent Models:

• ULN2803A: A classic Darlington array; however, it lacks the serial interface and diagnostic features of the DRV8860.
• TPIC6B595: An 8-bit shift register with power MOSFET outputs that offers similar serial-to-parallel functionality.
• MAX4896: A specialized 8-channel relay driver with a serial interface and built-in protection.

Package Includes:

• 1 x DRV8860PWR 8-Channel Serial Low-Side Motor Driver TSSOP-16