TIDT320A january   2023  – july 2023

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Functional Block Diagram
    3. 1.3 Pin Functions
  6. 2Waveforms
    1. 2.1 Switching Frequency and Operating Modes
    2. 2.2 Output Voltage Ripple
    3. 2.3 Load Transients
    4. 2.4 Start-Up Sequence
  7. 3Testing and Results
    1. 3.1 Efficiency Graphs
    2. 3.2 Efficiency Data
    3. 3.3 No Load and OFF State Power Consumption
    4. 3.4 Thermal Images
    5. 3.5 Bode Plots
    6. 3.6 Load Regulation

3.1 Efficiency Graphs

Efficiency was measured with a DC input source and loading only the 12VSB output. Efficiency was recorded with input voltages of 100 VDC, 170 VDC, 310 VDC, 390 VDC, and 410 VDC. Table 3-1 describes the system-level conditions represented by these DC input voltages.

Table 3-1 Rated System-Level Conditions
DC Input Voltage Representative System Condition
410 V PFC pre-regulator maximum output voltage
390 V PFC pre-regulator nominal output voltage
310 V Bridge-rectified 230 VAC input voltage
170 V Bridge-rectified 120 VAC input voltage
100 V Minimum operating input voltage
GUID-20230104-SS0I-VDCG-WMRH-1P7D2KWC21DW-low.png Figure 3-1 Efficiency Graph
GUID-20230104-SS0I-LLMG-CRB9-XCDGQXC7ZBQL-low.png Figure 3-2 Power Loss Graph