SLVSH64A May   2026  – August 2026 DRV8378

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
    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
      5. 7.7.5 Four Level Input Pin
    8. 7.8  Current Sense Amplifiers
      1. 7.8.1 Current Sense Amplifier Operation (29-pin variant)
      2. 7.8.2 Current Sense Amplifier Operation (23-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 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Power Supply Recommendations
      1. 8.2.1 Bulk Capacitance
    3. 8.3 Layout
      1. 8.3.1 Layout Guidelines
      2. 8.3.2 Layout Example
      3. 8.3.3 Thermal Considerations
        1. 8.3.3.1 Power Dissipation
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information
    1.     PACKAGE OPTION ADDENDUM
    2. 11.1 Tape and Reel Information

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)

In 3x PWM mode, the INHx pin controls each half-bridge and supports two output states: low or high. The INLx pin is used to put the half bridge in the Hi-Z state. If the Hi-Z state is not required, tie all INLx pins to logic high. The corresponding INHx and INLx signals control the output state as listed in Table 7-5

Table 7-3 3x PWM Mode Truth Table
INLxINHxPHASEx
0XHi-Z
10L
11H

Figure 7-7 below shows the application diagram of DRV8378 configured in 3x PWM mode.

DRV8378 3x PWM Mode Figure 7-7 3x PWM Mode