SNVU698B September   2020  – December 2020 LMQ61460-Q1

 

  1.   1
  2.   Trademarks
  3. 1Introduction
    1. 1.1 LMQ61460-Q1 Synchronous Step-Down Voltage Converter
  4. 2Quick Start Guide
  5. 3Detailed Descriptions
  6. 4Schematic
    1. 4.1 Alternative BOM Configurations
  7. 5Board Layout
  8. 6LMQ61460EVM-400K Board Test Results
    1. 6.1 EMI
    2. 6.2 Board Efficiency
    3. 6.3 Load Regulation
    4. 6.4 Thermals
  9. 7Bill of Materials
  10. 8Revision History

EMI

The EMI measurements were taken following CISPR 25, Class 5 standards. The measurements were taken at 13.5 VIN, 5 VOUT with a 6 A load switching at 400kHz.

GUID-406D1986-1C84-4B86-9E0A-03A570B00240-low.pngFigure 6-1 Conducted EMI Measurement with CISPR 25 Class 5 Limit Lines (150 kHz to 30 MHz)
GUID-C5299C1D-A6F7-41B3-A125-2D5A92384BE2-low.pngFigure 6-3 Radiated EMI Measurement with Horizontal Bicon Antenna Under CISPR 25 Class 5 Limits
GUID-58E77FB5-941C-4E2C-934D-1FDE3629E5E0-low.pngFigure 6-5 Radiated EMI Measurement with Horizontal Log Antenna Under CISPR 25 Class 5 Limits
GUID-5CC1147C-627F-4680-9830-BDA7B0AB29BB-low.pngFigure 6-2 Conducted EMI Measurement with CISPR 25 Class 5 Limit Lines (30 MHz to 108 MHz)
GUID-7912E5A6-9B89-413A-B91D-5989C0EAD4D3-low.pngFigure 6-4 Radiated EMI Measurement with Vertical Bicon Antenna Under CISPR 25 Class 5 Limits
GUID-E47A6562-7DA1-4A0A-9C10-9A134705FA6D-low.pngFigure 6-6 Radiated EMI Measurement with Vertical Log Antenna Under CISPR 25 Class 5 Limits