SLVSE39B November   2017  – July 2018 DRV8304

UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Simplified Schematic
  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 Timing Requirements
    7. 6.7 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 3-Phase Smart Gate Drivers
        1. 7.3.1.1 PWM Control Modes
          1. 7.3.1.1.1 6x PWM Mode (PWM_MODE = 00b or MODE Pin Tied to AGND)
          2. 7.3.1.1.2 3x PWM Mode (PWM_MODE = 01b or MODE Pin = 47 kΩ to AGND)
          3. 7.3.1.1.3 1x PWM Mode (PWM_MODE = 10b or MODE Pin = Hi-Z)
          4. 7.3.1.1.4 Independent PWM Mode (PWM_MODE = 11b or MODE Pin Tied to DVDD)
        2. 7.3.1.2 Device Interface Modes
          1. 7.3.1.2.1 Serial Peripheral Interface (SPI)
          2. 7.3.1.2.2 Hardware Interface
        3. 7.3.1.3 Gate Driver Voltage Supplies
        4. 7.3.1.4 Smart Gate-Drive Architecture
          1. 7.3.1.4.1 IDRIVE: MOSFET Slew-Rate Control
          2. 7.3.1.4.2 TDRIVE: MOSFET Gate Drive Control
          3. 7.3.1.4.3 Gate Drive Clamp
          4. 7.3.1.4.4 Propagation Delay
          5. 7.3.1.4.5 MOSFET VDS Monitors
          6. 7.3.1.4.6 VDRAIN Sense Pin
      2. 7.3.2 DVDD Linear Voltage Regulator
      3. 7.3.3 Pin Diagrams
      4. 7.3.4 Low-Side Current-Shunt Amplifiers
        1. 7.3.4.1 Bidirectional Current Sense Operation
        2. 7.3.4.2 Unidirectional Current Sense Operation (SPI only)
        3. 7.3.4.3 Offset Calibration
      5. 7.3.5 Gate-Driver Protection Circuits
        1. 7.3.5.1 VM Supply Undervoltage Lockout (UVLO)
        2. 7.3.5.2 VCP Charge-Pump Undervoltage Lockout (CPUV)
        3. 7.3.5.3 MOSFET VDS Overcurrent Protection (VDS_OCP)
          1. 7.3.5.3.1 VDS Latched Shutdown (OCP_MODE = 00b)
          2. 7.3.5.3.2 VDS Automatic Retry (OCP_MODE = 01b)
          3. 7.3.5.3.3 VDS Report Only (OCP_MODE = 10b)
          4. 7.3.5.3.4 VDS Disabled (OCP_MODE = 11b)
        4. 7.3.5.4 VSENSE Overcurrent Protection (SEN_OCP)
          1. 7.3.5.4.1 VSENSE Latched Shutdown (OCP_MODE = 00b)
          2. 7.3.5.4.2 VSENSE Automatic Retry (OCP_MODE = 01b)
          3. 7.3.5.4.3 VSENSE Report Only (OCP_MODE = 10b)
          4. 7.3.5.4.4 VSENSE Disabled (OCP_MODE = 11b or DIS_SEN = 1b)
        5. 7.3.5.5 Gate Driver Fault (GDF)
        6. 7.3.5.6 Thermal Warning (OTW)
        7. 7.3.5.7 Thermal Shutdown (OTSD)
    4. 7.4 Device Functional Modes
      1. 7.4.1 Gate Driver Functional Modes
        1. 7.4.1.1 Sleep Mode
        2. 7.4.1.2 Operating Mode
        3. 7.4.1.3 Fault Reset (CLR_FLT or ENABLE Reset Pulse)
    5. 7.5 Programming
      1. 7.5.1 SPI Communication
        1. 7.5.1.1 SPI
          1. 7.5.1.1.1 SPI Format
    6. 7.6 Register Maps
      1. Table 1. DRV8304S Register Map
      2. 7.6.1    Status Registers (DRV8304S Only)
        1. 7.6.1.1 Fault Status Register 1 (Address = 0x00) [reset = 0x00]
          1. Table 11. Fault Status Register 1 Field Descriptions
        2. 7.6.1.2 Fault Status Register 2 (Address = 0x01) [reset = 0x00]
          1. Table 12. Fault Status Register 2 Field Descriptions
      3. 7.6.2    Control Registers (DRV8304S Only)
        1. 7.6.2.1 Driver Control Register (Address = 0x02) [reset = 0x00]
          1. Table 14. Driver Control Field Descriptions
        2. 7.6.2.2 Gate Drive HS Register (Address = 0x03) [reset = 0x377]
          1. Table 15. Gate Drive HS Field Descriptions
        3. 7.6.2.3 Gate Drive LS Register (Address = 0x04) [reset = 0x777]
          1. Table 16. Gate Drive LS Register Field Descriptions
        4. 7.6.2.4 OCP Control Register (Address = 0x05) [reset = 0x145]
          1. Table 17. OCP Control Field Descriptions
        5. 7.6.2.5 CSA Control Register (Address = 0x06) [reset = 0x283]
          1. Table 18. CSA Control Field Descriptions
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Primary Application
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 External MOSFET Support
            1. 8.2.1.2.1.1 Example
          2. 8.2.1.2.2 IDRIVE Configuration
            1. 8.2.1.2.2.1 Example
          3. 8.2.1.2.3 VDS Overcurrent Monitor Configuration
            1. 8.2.1.2.3.1 Example
          4. 8.2.1.2.4 Sense-Amplifier Bidirectional Configuration
            1. 8.2.1.2.4.1 Example
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Alternative Application
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
          1. 8.2.2.2.1 Sense-Amplifier Unidirectional Configuration
            1. 8.2.2.2.1.1 Example
  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 Device Support
      1. 11.1.1 Device Nomenclature
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Community 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)
  • RHA|40
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.3.1.1.4 Independent PWM Mode (PWM_MODE = 11b or MODE Pin Tied to DVDD)

In this mode, the corresponding input pin independently controls each high-side and low-side gate driver. This control mode allows for the DRV8304 device to drive separate high-side and low-side loads with each half-bridge. These types of loads include unidirectional brushed DC motors, solenoids, and low-side and high-side switches. In this mode, if the system is configured in a half-bridge configuration, simultaneously turning on both the high-side and low-side MOSFETs causes shoot-through current in external MOSFETs and can cause them to damage.

Table 6. Independent PWM Mode Truth Table

INLx INHx GLx GHx
0 0 L L
0 1 L H
1 0 H L
1 1 H H

Because the high-side and low-side VDS overcurrent monitors share the SHx sense line, using the monitors if both the high-side and low-side gate drivers of one half-bridge are split and being used is not possible. In this case, connect the SHx pin to the high-side driver and disable the VDS overcurrent monitors as shown in Figure 14.

DRV8304 drv8304-independent-pwm-both.gifFigure 14. Independent PWM High-Side and Low-Side Drivers

If the half-bridge is used to implement only a high-side or low-side driver, using the VDS overcurrent monitors is still possible. Connect the SHx pin as shown in Figure 15 or Figure 16. The unused gate driver and the corresponding input can be left disconnected.

DRV8304 drv8304-independent-pwm-hs.gifFigure 15. Single High-Side Driver
DRV8304 drv8304-independent-pwm-ls.gifFigure 16. Single Low-Side Driver