SLVSNG2 August   2026 DRV8378-Q1

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings AUTO
    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 SPI Mode Timings
  8. 7 Detailed Description
    1. 7.1  Overview
    2. 7.2  Functional Block Diagram
    3. 7.3  Feature Description
      1. 7.3.1 Output Stage
      2. 7.3.2 Device Interface Modes
        1. 7.3.2.1 Serial Peripheral Interface (SPI)
        2. 7.3.2.2 Hardware Interface
      3. 7.3.3 Control Modes
        1. 7.3.3.1 3x PWM Mode (PWM_MODE = 10b or 11b or MODE_SR Pin is Connected to GVDD with RMODE or to GVDD)
        2. 7.3.3.2 6x PWM Mode (PWM_MODE = 00b or 01b or MODE_SR Pin Tied to AGND or in Hi-Z)
        3. 7.3.3.3 DRV8378G Control mode with External GVDD
      4. 7.3.4 GVDD Linear Voltage Regulator
      5. 7.3.5 Charge Pump
    4. 7.4  Slew Rate Control
    5. 7.5  Cross Conduction (Dead Time)
    6. 7.6  Propagation Delay
    7. 7.7  Pin Diagrams
      1. 7.7.1 Logic Level Input Pin (Internal Pulldown)
      2. 7.7.2 Logic Level Input Pin (Internal Pullup)
      3. 7.7.3 Open Drain Pin
      4. 7.7.4 Push Pull Pin
    8. 7.8  Current Sense Amplifiers
      1. 7.8.1 Current Sense Amplifier Operation (29-pin variant)
    9. 7.9  Active Demagnetization
      1. 7.9.1 Automatic Synchronous Rectification Mode (ASR Mode)
        1. 7.9.1.1 Automatic Synchronous Rectification in Commutation
        2. 7.9.1.2 Automatic Synchronous Rectification in PWM Mode
      2. 7.9.2 Automatic Asynchronous Rectification Mode (AAR Mode)
    10. 7.10 Cycle-by-Cycle Current Limit
      1. 7.10.1 Cycle by Cycle Current Limit with 100% Duty Cycle Input
    11. 7.11 Protections
      1. 7.11.1 Overcurrent Protection (OCP)
        1. 7.11.1.1 OCP Latched Shutdown (OCP_MODE = 00b)
        2. 7.11.1.2 OCP Automatic Retry (OCP_MODE = 01b)
        3. 7.11.1.3 OCP Disabled (OCP_MODE = 11b)
        4. 7.11.1.4 OCP Report Only (OCP_MODE = 10b)
      2. 7.11.2 VM Supply Undervoltage Lockout (RESET)
      3. 7.11.3 GVDD Undervoltage Lockout (GVDD_UV)
      4. 7.11.4 VCP Charge Pump Undervoltage Lockout (CPUV)
      5. 7.11.5 Over Voltage Protections (OV)
      6. 7.11.6 Thermal Warning (OTW)
      7. 7.11.7 Thermal Shutdown (OTS)
    12. 7.12 Device Functional Modes
      1. 7.12.1 Functional Modes
        1. 7.12.1.1 Sleep Mode
        2. 7.12.1.2 Operating Mode
        3. 7.12.1.3 Fault Reset (CLR_FLT or nSLEEP Reset Pulse)
      2. 7.12.2 DRVOFF functionality
    13. 7.13 SPI Communication
      1. 7.13.1 Programming
        1. 7.13.1.1 SPI Format
  9. 8 Register Map
    1. 8.1 CONTROL Registers
    2. 8.2 STATUS Registers
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Power Supply Recommendations
      1. 9.2.1 Bulk Capacitance
    3. 9.3 Layout
      1. 9.3.1 Layout Guidelines
      2. 9.3.2 Layout Example
      3. 9.3.3 Thermal Considerations
        1. 9.3.3.1 Power Dissipation
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information
    1.     PACKAGE OPTION ADDENDUM
    2. 11.1 Tape and Reel Information

7.3.4 GVDD Linear Voltage Regulator

A 5V linear regulator is integrated into the family of devices and is available for use by external circuitry. The GVDD regulator is used for powering up the internal digital circuitry of the device and additionally, this regulator can also provide the supply voltage for a low-power MCU or other circuitry supporting low current (up to 30mA). The output of the GVDD regulator must be bypassed near the GVDD pin with a X5R or X7R, 1-µF, 10V ceramic capacitor routed directly back to the adjacent AGND ground pin.

DRV8378-Q1 GVDD Linear Regulator Block DiagramFigure 7-5 GVDD Linear Regulator Block Diagram

Use below equation to calculate the power dissipated in the device by the GVDD linear regulator with VM as supply.

Equation 1. P=VVM-VGVDD×IGVDD

For example, at a VVM of 24V, drawing 20mA out of GVDD results in an additional power dissipation as shown in Equation 2.

Equation 2. P = 24   V - 5   V × 20   m A = 380   m W