SLOS861C March   2015  – January 2023 DRV2700

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and 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 Switching Characteristics
    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 Boost Converter and Control Loop
      2. 7.3.2 High-Voltage Amplifier
      3. 7.3.3 Fast Start-Up (Enable Pin)
      4. 7.3.4 Gain Control
      5. 7.3.5 Adjustable Boost Voltage
      6. 7.3.6 Adjustable Boost Current-Limit
      7. 7.3.7 Internal Charge Pump
      8. 7.3.8 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Boost + Amplifier Mode
      2. 7.4.2 Flyback Mode
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 AC-Coupled DAC Input Application
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1  Piezo Load Selection
          2. 8.2.1.2.2  Programming The Boost Voltage
          3. 8.2.1.2.3  Inductor and Transformer Selection
          4. 8.2.1.2.4  Programing the Boost and Flyback Current-Limit
          5. 8.2.1.2.5  Boost Capacitor Selection
          6. 8.2.1.2.6  Pulldown FET and Resistors
          7. 8.2.1.2.7  Low-Voltage Operation
          8. 8.2.1.2.8  Current Consumption Calculation
          9. 8.2.1.2.9  Input Filter Considerations
          10. 8.2.1.2.10 Output Limiting Factors
          11. 8.2.1.2.11 Startup and Shutdown Sequencing
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Filtered AC Coupled Single-Ended PWM Input Application
      3. 8.2.3 DC-Coupled DAC Input Application
      4. 8.2.4 DC-Coupled Reference Input Application
      5. 8.2.5 Flyback Circuit
    3. 8.3 System Example
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Boost + Amplifier Configuration Layout Considerations
      2. 10.1.2 Flyback Configuration Layout Considerations
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Trademarks
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • RGP|20
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.3.5 Adjustable Boost Voltage

The output voltage of the integrated boost converter is adjusted by a resistive feedback divider between the boost output voltage (BST) and the feedback pin (FB). The boost voltage should be programmed to a value greater than the maximum peak signal voltage that the user expects to create with the DRV2700 amplifier. Lower boost voltages achieve better system efficiency and therefore should be used when lower amplitude signals are applied. The minimum boost voltage that is required should be used to save on not only power but also heat dissipation. The maximum allowed boost voltage is 105 V.