SNAS491B February   2010  – February 2018 LM48580

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Typical Application
  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: VDD = 3.6 V
    6. 6.6 Typical Performance Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Class H Operation
      2. 8.3.2 Properties of Piezoelectric Elements
      3. 8.3.3 Differential Amplifier Explanation
      4. 8.3.4 Thermal Shutdown
      5. 8.3.5 Gain Setting
    4. 8.4 Device Functional Modes
      1. 8.4.1 Shutdown Function
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
        1. 9.2.1.1 Proper Selection of External Components
          1. 9.2.1.1.1 Boost Converter Capacitor Selection
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Boost Converter Output Capacitor Selection
          1. 9.2.2.1.1 Inductor Selection
          2. 9.2.2.1.2 Diode Selection
        2. 9.2.2.2 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Development Support
        1. 12.1.1.1 Third-Party Products Disclaimer
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

11.1 Layout Guidelines

  • Minimize trace impedance of the power, ground and all output traces for optimum performance.
  • Voltage loss due to trace resistance between the LM48580 and the load results in decreased output power and efficiency.
  • Trace resistance between the power supply and ground has the same effect as a poorly regulated supply, increased ripple and reduced peak output power.
  • Use wide traces for power supply inputs and amplifier outputs to minimize losses due to trace resistance, as well as route heat away from the device.
  • Proper grounding improves audio performance, minimizes crosstalk between channels and prevents switching noise from interfering with the audio signal.
  • Use of power and ground planes is recommended.

Place all digital components and route digital signal traces as far as possible from analog components and traces. Do not run digital and analog traces in parallel on the same PCB layer. If digital and analog signal lines must cross either over or under each other, ensure that they cross in a perpendicular fashion.