TIDT338 july   2023

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Considerations
  6. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
  7. 3Waveforms
    1. 3.1 Start-Up
    2. 3.2 Output Voltage Ripple
    3. 3.3 Load Transients
    4. 3.4 Control Loop Stability

1.2 Considerations

Except for efficiency and load transient measurements, resistive load was used. Unless otherwise indicated the input voltage was set to 12 V.

Table 1-1 Board Setup Summary
Board Variant COUT (Before FB) Ferrite Bead Feedthrough Capacitor COUT (After FB)
A 8 × 100 μF Yes 27 μF 2 × 100 μF
B 1 × 100 μF Yes No 2 × 100 μF
C 1 × 100 μF Yes No 1 × 100 μF
Table 1-2 Filtering Component Part Numbers
Component Designator Part Number Manufacturer
Ferrite Bead L1, L2 BLM31SN500SN1L Murata
Feedthrough Capacitor U1, U2 NFM31PC276B0J3L Murata
Tantalum Capacitor C8, C19 T520Y337M010ATE035 Kemet