TIDT225 March   2021

 

  1. 1Description
  2. 2Test Prerequisites
    1. 2.1 Voltage and Current Requirements
    2. 2.2 Required Equipment
  3. 3Testing and Results
    1. 3.1 Thermal Images
    2. 3.2 Efficiency and Power Dissipation Graphs
    3. 3.3 Efficiency and Power Dissipation Data
    4. 3.4 Cross Regulation
    5. 3.5 Loop Gain
  4. 4Waveforms
    1. 4.1 Start-up
    2. 4.2 Switching Waveforms
    3. 4.3 Output Voltage Ripple
    4. 4.4 Load Transients

3.5 Loop Gain

Bode plots data are shown in the following tables and figures.

Table 3-1 Voltage and Current Requirements
Vin (V) Bandwidth (kHz) Phase Margin (°) Gain Margin (dB)
7 8.17 88.2 27
12 12.1 71.3 23
32 11.3 71.3 21
GUID-20210219-CA0I-JLZR-TBNW-XCC7GKWCDNX2-low.jpg Figure 3-7 100% Loading; +18 V and –5.1 V at 75 mA and (3X) +18 V and –5 V at 25 mA
Table 3-2 Voltage and Current Requirements
Vin (V) Bandwidth (kHz) Phase Margin (°) Gain Margin (dB)
7 11.5 79.0 24
12 12.1 78.9 26
32 12.0 79.3 23
GUID-20210219-CA0I-S8TS-0BNN-Q4S8NXF5TD8G-low.jpg Figure 3-8 50% Loading; +18 V and –5.1 V at 37 mA and (3X) +18 V and –5 V at 12 mA