SBVU068 august   2023 TPS7A78

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  6. 2Hardware
    1. 2.1 Setup
      1. 2.1.1 Full-Bridge (FB) Test Equipment Connection
      2. 2.1.2 Half-Bridge (HB) Test Equipment Connection
    2. 2.2 Jumper Information
      1. 2.2.1  J1: LDO_IN
      2. 2.2.2  J2: Line VAC
      3. 2.2.3  J3: LDO_OUT
      4. 2.2.4  J4: LDO_IN Sense
      5. 2.2.5  J5: SCIN
      6. 2.2.6  J6: LDO_OUT Sense
      7. 2.2.7  J7: LDO_OUT/GND
      8. 2.2.8  J8: LDO_IN/GND
      9. 2.2.9  J9, J11, J13: GND
      10. 2.2.10 J10: Neutral VAC
      11. 2.2.11 J12: Second Surge Resistor Jumper
      12. 2.2.12 J14: Full-Bridge (FB) and Half-Bridge(HB) Configurations
      13. 2.2.13 J15: LDO Pin test header
      14. 2.2.14 J16 and J18: Power-Good (PG) and Power-Fail (PF) Signals
      15. 2.2.15 J17: Coin Cell Buffer VCC Jumper
    3. 2.3 Test Points
  7. 3Implementation Results
    1. 3.1 Performance Data and Results
  8. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  9. 5Compliance Information
    1. 5.1 Compliance and Certifications
      1. 5.1.1 Passing Pre-Compliance Conducted Emission Test Results Using Capacitors and Resistors in the Input Filter
      2. 5.1.2 Passing Pre-Compliance Conducted Emission Test Results Using Capacitors, Resistors and Inductors in the Input Filter
    2. 5.2 Surge Testing
    3. 5.3 EFT Compliance
    4. 5.4 ESD Compliance
  10. 6Additional Information
    1. 6.1 Trademarks

5.1.2 Passing Pre-Compliance Conducted Emission Test Results Using Capacitors, Resistors and Inductors in the Input Filter

In the pre-compliance testing, the EVM has passed FCC Part 15 and CISPR 22 CLASS B CONDUCTED EMI LIMIT tests. The EVM passing the standard utilizing an introduced inductance in the loop on the R4 resistor footprint is shown below.

Section 5.1.2 curves all configured with the following: TJ = 25 °C, LDO_OUT = 3.6 V, VAC = 120 V, R4 = 100 Ω, C7 = 100 nF, R2 = 75 Ω, IOUT = 60 mA (unless otherwise noted)

GUID-20230404-SS0I-PN88-4BPK-WWV54FJDBPKG-low.png Figure 5-10 FB, Iout = 30 mA, R4 = 100 uH