ZHCS343C May   2012  – January 2023 DRV2665

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Revision History
  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 Timing Requirements
    7. 6.7 Switching Characteristics
    8. 6.8 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Support for Haptic Piezo Actuators
      2. 7.3.2  Flexible Front End Interface
      3. 7.3.3  Ramp Down Behavior
      4. 7.3.4  Low Latency Startup
      5. 7.3.5  Low Power Standby Mode
      6. 7.3.6  Device Reset
      7. 7.3.7  Amplifier Gain
      8. 7.3.8  Adjustable Boost Voltage
      9. 7.3.9  Adjustable Current Limit
      10. 7.3.10 Internal Charge Pump
      11. 7.3.11 Device Protection
        1. 7.3.11.1 Thermal Protection
        2. 7.3.11.2 Overcurrent Protection
        3. 7.3.11.3 Brownout Protection
    4. 7.4 Device Functional Modes
      1. 7.4.1 FIFO Mode
      2. 7.4.2 Analog Playback Mode
      3. 7.4.3 Low Voltage Operation Mode
    5. 7.5 Programming
      1. 7.5.1 Programming the Boost Voltage
      2. 7.5.2 Programming the Boost Current Limit
      3. 7.5.3 I2C Interface
        1. 7.5.3.1 General I2C Operation
        2. 7.5.3.2 Single-Byte and Multiple-Byte Transfers
        3. 7.5.3.3 Single-Byte Write
        4. 7.5.3.4 Multiple-Byte Write and Incremental Multiple-Byte Write
        5. 7.5.3.5 Single-Byte Read
        6. 7.5.3.6 Multiple-Byte Read
    6. 7.6 Register Map
      1. 7.6.1 Address: 0x00
      2. 7.6.2 Address: 0x01
      3. 7.6.3 Address: 0x02
      4. 7.6.4 Address: 0x0B
  9. 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 Inductor Selection
        2. 8.2.2.2 Piezo Actuator Selection
        3. 8.2.2.3 Boost Capacitor Selection
        4. 8.2.2.4 Bulk Capacitor Selection
      3. 8.2.3 Application Curves
    3. 8.3 Initialization Setup
      1. 8.3.1 Initialization Procedure
  10. 9 Power Supply Recommendations
  11. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 Community Resources
    2. 11.2 Trademarks
  13. 12Mechanical, Packaging, and Orderable Information

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7.1 Overview

The DRV2665 device is a piezo haptic driver with integrated boost switch, integrated power diode, integrated fully-differential amplifier, and integrated digital front end. This versatile device is capable of driving both high-voltage and low-voltage piezo haptic actuators. The input signal can be driven over the I2C port or the analog inputs.

The digital interface of the DRV2665 device is available through an I2C compatible bus. A digital interface relieves the costly processor burden of PWM generation or additional analog channel requirements in the host system. Any writes to the internal FIFO automatically wakes up the device and begin playing the waveform after the 2 ms internal startup procedure. When the data flow stops or the FIFO under runs, the device automatically enters a pop-less shutdown procedure.

The boost voltage is set using two external resistors, and the boost current limit is programmable through the REXT resistor. A typical start-up time of 2 ms makes the DRV2665 an ideal piezo driver for fast haptic responses. Thermal overload protection prevents the device from being damaged when overdriven.