TIDT336 may   2023

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Considerations
    4. 1.4 Dimensions
    5. 1.5 Test Setup
  6. 2Testing and Results
    1. 2.1 Efficiency Graph
    2. 2.2 Efficiency Data
    3. 2.3 Static Output Voltage Variation vs Load Current and VIN
      1. 2.3.1 24-V Output Voltage
      2. 2.3.2 3.3-V Output Voltage
      3. 2.3.3 U2 Input Voltage
  7. 3Waveforms
    1. 3.1 Switching Waveforms on Pin 1 of U1 (SW), Anodes of D1 and D4, at Full Load
      1. 3.1.1 18-V Input Voltage
      2. 3.1.2 24-V Input Voltage
      3. 3.1.3 32-V Input Voltage
    2. 3.2 Output Voltage Ripple
    3. 3.3 Load Transients
    4. 3.4 Start-Up Sequence
      1. 3.4.1 No Load
      2. 3.4.2 Full Load
    5. 3.5 Shutdown Sequence

2.2 Efficiency Data

The efficiency graph in Figure 3-10 reports the data, taken from the following tables.

Table 2-1 Efficiency Data for 24-V Input Voltage
VIN (V) IN (mA) PIN (W) 24 V-VOUT (V) 24 V-IOUT (mA) 4 V-VOUT (V) 3.3 V-VOUT (V) 3.3 V-IOUT (mA) POUT (W) Efficiency (%)
24.00 1.43 0.034 23.72 0.0 4.576 3.307 0.0 0.000 0.00%
23.99 8.94 0.214 23.71 5.4 4.591 3.300 2.1 0.135 62.93%
23.99 16.26 0.390 23.70 10.8 4.595 3.299 4.8 0.272 69.68%
23.97 28.88 0.692 23.68 21.5 4.587 3.299 9.8 0.541 78.22%
24.05 50.00 1.203 23.65 40.3 4.593 3.298 15.1 1.003 83.40%
Table 2-2 Efficiency Data for 18-V Input Voltage
VIN (V) IN (mA) PIN (W) 24V-VOUT (V) 24V-IOUT (mA) 4V-VOUT (V) 3.3V-VOUT (V) 3.3V-IOUT (mA) POUT (W) Efficiency (%)
18.03 1.61 0.029 23.72 0.0 4.577 3.307 0.0 0.000 0.00%
18.03 11.31 0.204 23.71 5.4 4.585 3.300 2.5 0.136 66.83%
18.02 20.49 0.369 23.70 10.8 4.594 3.299 4.9 0.272 73.70%
18.00 38.3 0.689 23.68 21.5 4.586 3.299 9.9 0.542 78.59%
17.96 65.5 1.176 23.65 40.3 4.602 3.298 14.9 1.002 85.20%
Table 2-3 Efficiency Data for 32-V Input Voltage
VIN (V) IN (mA) PIN (W) 24 V-VOUT (V) 24 V-IOUT (mA) 4 V-VOUT (V) 3.3 V-VOUT (V) 3.3 V-IOUT (mA) POUT (W) Efficiency (%)
32.19 1.28 0.041 23.71 0.0 4.592 3.307 0.0 0.000 0.00%
32.19 6.92 0.223 23.71 5.4 4.603 3.300 2.7 0.137 61.48%
32.18 12.16 0.391 23.70 10.7 4.618 3.299 5.1 0.270 69.11%
32.17 21.6 0.695 23.67 21.5 4.618 3.299 9.9 0.542 77.97%
32.15 38.1 1.225 23.66 40.2 4.628 3.298 15.3 1.002 81.77%