SLOSEC9 September   2024 TSD5402-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Requirements for I2C Interface Signals
    7. 5.7 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Analog Input and Preamplifier
      2. 6.3.2 Pulse-Width Modulator (PWM)
      3. 6.3.3 Gate Drive
      4. 6.3.4 Power FETs
      5. 6.3.5 Load Diagnostics
        1. 6.3.5.1 Load Diagnostics Sequence
        2. 6.3.5.2 Faults During Load Diagnostics
      6. 6.3.6 Protection and Monitoring
      7. 6.3.7 I2C Serial Communication Bus
        1. 6.3.7.1 I2C Bus Protocol
        2. 6.3.7.2 Random Write
        3. 6.3.7.3 Random Read
        4. 6.3.7.4 Sequential Read
    4. 6.4 Device Functional Modes
      1. 6.4.1 Hardware Control Pins
      2. 6.4.2 EMI Considerations
      3. 6.4.3 Operating Modes and Faults
  8. 7 Register Maps
    1. 7.1 I2C Address Register Definitions
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
        1. 8.2.1.1 Amplifier Output Filtering
        2. 8.2.1.2 Amplifier Output Snubbers
        3. 8.2.1.3 Bootstrap Capacitors
        4. 8.2.1.4 Analog Signal Input Filter
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Unused Pin Connections
          1. 8.2.2.1.1 HI-Z Pin
          2. 8.2.2.1.2 STANDBY Pin
          3. 8.2.2.1.3 I2C Pins (SDA and SCL)
          4. 8.2.2.1.4 Terminating Unused Outputs
          5. 8.2.2.1.5 Using a Single-Ended Signal Input
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Examples
        1. 8.4.2.1 Top Layer
        2. 8.4.2.2 Second Layer – Signal Layer
        3. 8.4.2.3 Third Layer – Power Layer
        4. 8.4.2.4 Bottom Layer – Ground Layer
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information
    1. 11.1 Package Option Addendum
      1. 11.1.1 Packaging Information
      2. 11.1.2 Tape and Reel Information

8.2.1.1 Amplifier Output Filtering

Output FETs drive the amplifier outputs in an H-bridge configuration. These transistors are either fully off or on. The result is a square-wave output signal with a duty cycle that is proportional to the amplitude of the input signal. The amplifier outputs require a low-pass filter to filter out the PWM modulation carrier frequency. People frequently call this filter the L-C filter, due to the presence of an inductive element L and a capacitive element C to make up the 2-pole low-pass filter. The L-C filter attenuates the carrier frequency, reducing electromagnetic emissions and smoothing the current waveform which the load draws from the power supply. See Class-D LC Filter Design for a detailed description on proper component selection and design of an L-C filter based upon the desired load and response.