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
8.2.1.2.5 Boost Capacitor Selection

The boost output voltage is programmable as high as 105 V. A capacitor with a voltage rating of at least the boost output voltage must be selected. Because ceramic capacitors come in ratings of 100 V or 250 V, a 250-V rated 100-nF capacitor of the X5R or X7R type is recommended for the 105-V case. The selected capacitor should have a minimum working capacitance of at least 50 nF. If a smaller ripple on this node is required, then a larger capacitor should be selected. If using a differential output in the boost + amplifier configuration, then the ripple is canceled because it is prevelant on both the OUT+ and OUT– pins.

For this design example, a 100-nF capacitor was used.