DRV8837CDSGR

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1. Description

The DRV8837CDSGR device provides an integrated motor driver solution for cameras, consumer products, toys, and other low-voltage or battery-powered motion control applications. The device can drive one DC motor or other devices like solenoids. The output driver block consists of N-channel power MOSFETs configured as an H-bridge to drive the motor winding. An internal charge pump generates needed gate drive voltages. The DRV8837C device can supply up to 1 A of output current. The device operates on a motor power supply voltage from 0 to 11 V, and control logic can operate on 1.8-V to 5-V rails. The DRV8837C device has a PWM (IN/IN) input interface. Internal shutdown functions are provided for overcurrent protection, short circuit protection, undervoltage lockout, and overtemperature.  

2. Features

    1. H-Bridge Motor Driver

        – Drives a DC Motor or Other Loads

        – Low MOSFET On-Resistance: HS + LS 1 Ω

    2. 1-A Maximum Drive Current

    3. 0- to 11-V Operating Supply-Voltage Range

    4. Standard PWM Interface (IN1/IN2)

    5. Low-Power Sleep Mode With 120-nA Maximum Sleep Current

        – nSLEEP pin

    6. Small Package and Footprint

        – 8 WSON (With Thermal Pad)

        – 2.0 × 2.0 mm

    7. Protection Features

        – VCC Undervoltage Lockout (UVLO)

        – Overcurrent Protection (OCP)

        – Thermal Shutdown (TSD)

3. Applications

    1. Cameras

    2. DSLR Lenses

    3. Consumer Products

    4. Toys

    5. Robotics

    6. Medical Devices

4. Pin Configuration

5. Pin Functions

6. Feature Description

   1. Bridge Control

The DRV8837C device is controlled using a PWM input interface, also called an IN/IN interface. Each output is controlled by a corresponding input pin.

   2. Sleep Mode

If the nSLEEP pin is brought to a logic-low state, the DRV8837C device enters a low-power sleep mode. In this state, all unnecessary internal circuitry is powered down.

   3. Power Supplies and Input Pins

The input pins can be driven within the recommended operating conditions with or without the VCC, VM, or both power supplies present. No leakage current path exists to the supply. Each input pin has a weak pulldown resistor (approximately 100 kΩ) to ground. The VCC and VM supplies can be applied and removed in any order. When the VCC supply is removed, the device enters a low-power state and draws very little current from the VM supply. The VCC and VM pins can be connected together if the supply voltage is between 1.8 and 7 V. The VM voltage supply does not have any undervoltage-lockout protection (UVLO). As long as VCC > 1.8 V, the internal device logic remains active which means that the VM pin voltage can drop to 0 V, however, the load may not be sufficiently driven at low VM voltages.