SBAS654F June 2014  – March 2017 AMC1305L25 , AMC1305M05 , AMC1305M25

PRODUCTION DATA. 

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Device Comparison Table
  6. Pin Configurations and Functions
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Power Ratings
    6. 7.6 Insulation Specifications
    7. 7.7 Safety-Related Certifications
    8. 7.8 Safety Limiting Values
    9. 7.9 Electrical Characteristics: AMC1305M05
    10. 7.10Electrical Characteristics: AMC1305x25
    11. 7.11Switching Characteristics
    12. 7.12Insulation Characteristics Curves
    13. 7.13Typical Characteristics
  8. Detailed Description
    1. 8.1Overview
    2. 8.2Functional Block Diagram
    3. 8.3Feature Description
      1. 8.3.1Analog Input
      2. 8.3.2Modulator
      3. 8.3.3Digital Output
    4. 8.4Device Functional Modes
      1. 8.4.1Fail-Safe Output
      2. 8.4.2Output Behavior in Case of Full-Scale Input
  9. Application and Implementation
    1. 9.1Application Information
      1. 9.1.1Digital Filter Usage
    2. 9.2Typical Applications
      1. 9.2.1Frequency Inverter Application
        1. 9.2.1.1Design Requirements
        2. 9.2.1.2Detailed Design Procedure
        3. 9.2.1.3Application Curve
      2. 9.2.2Isolated Voltage Sensing
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2Detailed Design Procedure
        3. 9.2.2.3Application Curve
  10. 10Power-Supply Recommendations
  11. 11Layout
    1. 11.1Layout Guidelines
    2. 11.2Layout Examples
  12. 12Device and Documentation Support
    1. 12.1Documentation Support
      1. 12.1.1Related Documentation
    2. 12.2Related Links
    3. 12.3Receiving Notification of Documentation Updates
    4. 12.4Community Resource
    5. 12.5Trademarks
    6. 12.6Electrostatic Discharge Caution
    7. 12.7Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Power-Supply Recommendations

In a typical frequency inverter application, the high-side power supply (AVDD) for the device is derived from the floating power supply of the upper gate driver. For lowest cost, a Zener diode can be used to limit the voltage to 5 V ±10%. Alternatively a low-cost low-drop regulator (LDO), for example the LM317-N, can be used to minimize noise on the power supply. A low-ESR decoupling capacitor of 0.1 µF is recommended for filtering this power-supply path. Place this capacitor (C2 in Figure 58) as close as possible to the AVDD pin of the AMC1305 for best performance. If better filtering is required, an additional 10-µF capacitor can be used. The floating ground reference (AGND) is derived from the end of the shunt resistor, which is connected to the negative input (AINN) of the device. If a four-pin shunt is used, the device inputs are connected to the inner leads, while AGND is connected to one of the outer leads of the shunt.

For decoupling of the digital power supply on controller side, TI recommends using a 0.1-µF capacitor assembled as close to the DVDD pin of the AMC1305 as possible, followed by an additional capacitor in the range of 1 µF to 10 µF.

AMC1305L25 AMC1305M05 AMC1305M25 ai_pwr_bas654.gif Figure 58. Zener-Diode-Based High-Side Power Supply