SLVSDR9E October   2016  – January 2021 DRV8702-Q1 , DRV8703-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 SPI Timing Requirements
    7. 6.7 Switching Characteristics
    8.     15
    9. 6.8 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Bridge Control
        1. 7.3.1.1 Logic Tables
      2. 7.3.2  MODE Pin
      3. 7.3.3  nFAULT Pin
      4. 7.3.4  Current Regulation
      5. 7.3.5  Amplifier Output (SO)
        1. 7.3.5.1 SO Sample and Hold Operation
      6. 7.3.6  PWM Motor Gate Drivers
        1. 7.3.6.1 Miller Charge (QGD)
      7. 7.3.7  IDRIVE Pin (DRV8702-Q1 Only)
      8. 7.3.8  Dead Time
      9. 7.3.9  Propagation Delay
      10. 7.3.10 Overcurrent VDS Monitor
      11. 7.3.11 VDS Pin (DRV8702-Q1 Only)
      12. 7.3.12 Charge Pump
      13. 7.3.13 Gate Drive Clamp
      14. 7.3.14 Protection Circuits
        1. 7.3.14.1 VM Undervoltage Lockout (UVLO2)
        2. 7.3.14.2 Logic Undervoltage (UVLO1)
        3. 7.3.14.3 VCP Undervoltage Lockout (CPUV)
        4. 7.3.14.4 Overcurrent Protection (OCP)
        5. 7.3.14.5 Gate Driver Fault (GDF)
        6. 7.3.14.6 Thermal Shutdown (TSD)
        7. 7.3.14.7 Watchdog Fault (WDFLT, DRV8703-Q1 Only)
        8. 7.3.14.8 Reverse Supply Protection
      15. 7.3.15 Hardware Interface
        1. 7.3.15.1 IDRIVE (6-level input)
        2. 7.3.15.2 VDS (6-Level Input)
    4. 7.4 Device Functional Modes
    5. 7.5 Programming
      1. 7.5.1 SPI Communication
        1. 7.5.1.1 Serial Peripheral Interface (SPI)
        2. 7.5.1.2 SPI Format
    6. 7.6 Register Maps
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 External FET Selection
        2. 8.2.2.2 IDRIVE Configuration
        3. 8.2.2.3 VDS Configuration
        4. 8.2.2.4 Current Chopping Configuration
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
    1. 9.1 Bulk Capacitance Sizing
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Related Links
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Support Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • RHB|32
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.1 Overview

DRV87002-Q1 and DRV87003-Q1 are single H-bridge drivers, also referred to as gate controllers. The drivers control four external NMOS FETs used to drive a bi-directional brushed-DC motors. The devices can also operate in independent half bridge mode to drive two single directional brushed-DC motors.

The devices can support supply voltages from 5.5 V to 45 V and have a low power sleep mode enabled through the nSLEEP pin. There are three options for the interface modes including a configurable PH/EN, independent H-bridge control, or PWM interface. This allows easy interfacing to the controller circuit.

DRV87002-Q1 and DRV87003-Q1 include Smart Gate Drive technology which offers a combination of protection features and gate-drive configurability to improve design simplicity and bring a new level of intelligence to motor systems. The gate-drive strength, or gate-drive current can be adjusted through the driver itself to optimize for different FETs and applications without the need for external resistors. Smart Gate Drive significantly reduces the component count of discrete motor-driver systems by integrating the required FET drive circuitry into a single device. The peak current can be adjusted through the IDRIVE pin for DRV8702-Q1 and through SPI for DRV8703-Q1. Both the high-side and low-side FETs are driven with a gate source voltage (VGS) of 10.5 V (nominal) when the VM voltage is more than 13.5 V. At lower VM voltages, the VGS is reduced. The high-side gate drive voltage is generated using a doubler-architecture charge pump that regulates to the VM + 10.5 V.

The inrush or start up current and running current can be limited through a built in fixed time-off current chopping scheme. The chopping current level is set through the sense resistor by setting a voltage on the VREF pin. See the current regulation section for more information. A shunt-amplifier is also included in the devices to provide accurate current measurements to the system controller. The SO pin outputs a voltage that is approximately 20 times the voltage across the sense resistor on the DRV8702-Q1 device. For the DRV8703-Q1, this gain is configurable.

The DRV870x-Q1 device also has protection features beyond traditional discrete implementations including: undervoltage lockout (UVLO), overcurrent protection (OCP), gate driver faults, and thermal shutdown (TSD).

The device integrates a spread spectrum clocking feature for both the internal digital oscillator and internal charge pump. This feature combined with output slew rate control minimizes the radiated emissions from the device.