SNVAA21 August   2021 LM61480-Q1 , LM61495-Q1 , LM62460 , LM62460-Q1

 

  1.   Trademarks
  2. 1Introduction
  3. 2Different Types of Current Sensing
  4. 3Basic Current Sharing Operation
  5. 4Schematic and BOM
  6. 5Lab Measurements
  7. 6Caveats and Recommendations
  8. 7Summary
  9. 8References

Lab Measurements

GUID-20210419-CA0I-6PTW-3TWG-TZJBTRZJXHKD-low.pngFigure 5-1 Inductor Current Sharing Steady-State Waveform
  • IOUT_(Main) = 4.53 A
  • IOUT_(Secondary) = 4.64 A
  • IOUT_(Average) = 4.58 A
  • Current sharing accuracy = 4.58 +/- 1.13%
GUID-20210419-CA0I-MGZZ-RTTR-QGFM0SRKRWMC-low.pngFigure 5-2 Inductor Current Sharing Load Transient (3 A to 9 A) Waveform
  • IOUT_(Main) = 4.79A
  • IOUT_(Secondary) = 4.47A
  • IOUT_(Average) = 4.63A
  • Current sharing accuracy = 4.63 +/- 3.45%
GUID-20210419-CA0I-Z69G-MHSQ-3GFKTPXHR9TX-low.gifFigure 5-3 Efficiency at 400 kHz (VIN = 16 V; VOUT = 3.3 V)
GUID-20210419-CA0I-D93L-DZ8R-H3B3CD3SGQW0-low.pngFigure 5-4 Thermal Measurement at 400 kHz (VIN = 16 V; VOUT = 3.3 V; IOUT = 4.5 A)
GUID-20210419-CA0I-0G9S-BXPM-XQ9FBGMXC24H-low.gifFigure 5-5 Efficiency at 2.2 MHz ( VIN = 16 V; VOUT = 3.3 V)
GUID-20210419-CA0I-MZRP-PB3K-T61CWNNHVBVF-low.pngFigure 5-6 Thermal Measurement at 2.2 MHz (VIN = 16 V; VOUT = 3.3 V: IOUT = 4.5 A)