SNVSC82A january   2023  – april 2023 TPSF12C3-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 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 Electrical Characteristics
    6. 7.6 System Characteristics
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Active EMI Filtering
        1. 8.3.1.1 Schematics
      2. 8.3.2 Capacitive Amplification
      3. 8.3.3 Integrated Line Rejection Filter
      4. 8.3.4 Compensation
      5. 8.3.5 Remote Enable
      6. 8.3.6 Supply Voltage UVLO Protection
      7. 8.3.7 Thermal Shutdown Protection
    4. 8.4 Device Functional Modes
      1. 8.4.1 Shutdown Mode
      2. 8.4.2 Active Mode
  9. 9 Applications and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Design 1 – AEF Circuit for High-Density On-Board Charger (OBC) in Electric Vehicles (EVs)
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Sense Capacitors
          2. 9.2.1.2.2 Inject Capacitor
          3. 9.2.1.2.3 Compensation Network
          4. 9.2.1.2.4 Injection Network
          5. 9.2.1.2.5 Surge Protection
        3. 9.2.1.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  10. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Third-Party Products Disclaimer
      2. 10.1.2 Development Support
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 Receiving Notification of Documentation Updates
    4. 10.4 Support Resources
    5. 10.5 Trademarks
    6. 10.6 Electrostatic Discharge Caution
    7. 10.7 Glossary
  11. 11Mechanical, Packaging, and Orderable Information

Package Options

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

8.3.1.1 Schematics

Figure 9-3 and Figure 8-2 show schematics for conventional two-stage passive EMI filters with and without neutral, respectively, in kilowatt-scale, grid-connected applications. L, N and PE refer to the respective live, neutral and protective earth connections. Multistage filters as shown provide high roll-off and are widely used in high-power AC line applications where CM noise is often more challenging to mitigate than DM noise. The low-order switching harmonics usually dictate the size of the reactive filter components based on the required corner frequency (or multiple corner frequencies in multistage designs).

Also included in Figure 9-3 and Figure 8-2 are the corresponding active filter designs. The active circuit replaces the bank of Y-capacitors positioned between the CM chokes with a three-phase AEF circuit using the TPSF12C3-Q1 to provide a lower impedance shunt path for CM currents. The sense pins of the TPSF12C3-Q1 interface with the power lines using a set of Y-rated sense capacitors, typically 680 pF, and feed into an internal high-pass filter and signal combiner. The IC rejects both line-frequency (50-Hz or 60-Hz) AC voltage as well as DM disturbances, while amplifying high-frequency CM disturbances and maintaining closed-loop stability using an external tunable damping circuit.

GUID-20230411-SS0I-09SF-HVQQ-4CLLXWVHMG1L-low.svg Figure 8-1 Circuit Schematic of a Three-Phase, Four-Wire Passive Filter and Corresponding Active Filter Solution for CM Attenuation
GUID-20230411-SS0I-BKBD-NMP3-KL9GZPDDHZTN-low.svg Figure 8-2 Circuit Schematic of a Three-Phase, Three-Wire Passive Filter and Corresponding Active Filter Solution for CM Attenuation

The X-capacitors placed between the two CM chokes effectively provide a low-impedance path between the power lines from a CM standpoint, typically up to low-MHz frequencies. This allows current injection onto one power line, typically neutral, using only one inject capacitor. If the three-phase filter is a three-wire system without neutral as shown in Figure 8-2, the SENSE4 pin of the TPSF12C3-Q1 ties to ground and the inject capacitor couples through a star-point connection of the X-capacitors.