TIDT386 April   2024

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Dimensions
  6. 2Testing and Results
    1. 2.1 Efficiency Graphs
      1. 2.1.1 –7V Output Voltage
      2. 2.1.2 –11V Output Voltage
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
      1. 2.3.1 8V Input Voltage
      2. 2.3.2 48V Input Voltage
    4. 2.4 Bode Plots
      1. 2.4.1 8V Input Voltage
        1. 2.4.1.1 –7V Output Voltage
        2. 2.4.1.2 –11V Output Voltage
      2. 2.4.2 48V Input Voltage
        1. 2.4.2.1 –7V Output Voltage
        2. 2.4.2.2 –11V Output Voltage
  7. 3Waveforms
    1. 3.1 Switching
      1. 3.1.1 12V Input Voltage
        1. 3.1.1.1 –7V Output Voltage
          1. 3.1.1.1.1 Switchnode Referenced to –VOUT
          2. 3.1.1.1.2 Switchnode Referenced to VIN
        2. 3.1.1.2 –11V Output Voltage
          1. 3.1.1.2.1 Switchnode Referenced to –VOUT
          2. 3.1.1.2.2 Switchnode Referenced to VIN
      2. 3.1.2 48V Input Voltage
        1. 3.1.2.1 –7V Output Voltage
          1. 3.1.2.1.1 Switchnode Referenced to –VOUT
          2. 3.1.2.1.2 Switchnode Referenced to VIN
        2. 3.1.2.2 –11V Output Voltage
          1. 3.1.2.2.1 Switchnode Referenced to –VOUT
          2. 3.1.2.2.2 Switchnode Referenced to VIN
    2. 3.2 Input Voltage Ripple
      1. 3.2.1 12V Input Voltage
        1. 3.2.1.1 –7V Output Voltage
        2. 3.2.1.2 –11V Output Voltage
      2. 3.2.2 48V Input Voltage
        1. 3.2.2.1 –7V Output Voltage
        2. 3.2.2.2 –11V Output Voltage
    3. 3.3 Output Voltage Ripple
      1. 3.3.1 12V Input Voltage
        1. 3.3.1.1 –7V Output Voltage
        2. 3.3.1.2 –11V Output Voltage
      2. 3.3.2 48V Input Voltage
        1. 3.3.2.1 –7V Output Voltage
        2. 3.3.2.2 –11V Output Voltage
    4. 3.4 Load Transients
      1. 3.4.1 12V Input Voltage
        1. 3.4.1.1 –7V Output Voltage
        2. 3.4.1.2 –11V Output Voltage
      2. 3.4.2 48V Input Voltage
        1. 3.4.2.1 –7V Output Voltage
        2. 3.4.2.2 –11V Output Voltage
    5. 3.5 Level Shifters
    6. 3.6 Start-Up Sequence

2.2 Efficiency Data

Table 2-1 Efficiency Data, 12VIN, –11VOUT
Voltage (V) Current (A) Voltage (V) Current (A) Losses (W) Efficiency (%)
12.0500 0.0929 11.0460 0.0571 0.49 56.3
12.0400 0.1386 11.0450 0.1057 0.50 70.0
12.0500 0.2809 11.0430 0.2569 0.55 83.8
12.0000 0.5174 11.0390 0.5052 0.63 89.8
12.1000 0.7487 11.0360 0.7563 0.71 92.1
12.0500 0.9898 11.0330 1.0076 0.81 93.2
11.9900 1.2260 11.0270 1.2550 0.86 94.1
12.0500 1.4610 11.0220 1.5050 1.02 94.2
11.9900 1.7100 11.0180 1.7540 1.18 94.3
12.0400 1.9500 11.0150 2.0050 1.39 94.1
11.9800 2.2090 11.0110 2.2560 1.62 93.9
12.0100 2.4520 11.0090 2.5040 1.88 93.6
Table 2-2 Efficiency Data, 48VIN, –11VOUT
Voltage (V) Current (A) Voltage (V) Current (A) Losses (W) Efficiency (%)
48.1000 0.0443 11.0530 0.0571 1.50 29.6
48.1000 0.0558 11.0520 0.1057 1.52 43.5
48.1000 0.0916 11.0500 0.2569 1.57 64.4
48.1000 0.1508 11.0480 0.5052 1.67 76.9
48.1000 0.2117 11.0460 0.7563 1.83 82.0
48.1000 0.2721 11.0440 1.0074 1.96 85.0
48.1000 0.3295 11.0390 1.2550 2.00 87.4
48.1000 0.3886 11.0380 1.5060 2.07 88.9
48.1000 0.4473 11.0360 1.7540 2.16 90.0
48.1000 0.5068 11.0340 2.0040 2.26 90.7
48.1000 0.5664 11.0330 2.2550 2.36 91.3
48.1000 0.6257 11.0330 2.5040 2.47 91.8
Table 2-3 Efficiency Data, 12VIN, –7VOUT
Voltage (V) Current (A) Voltage (V) Current (A) Losses (W) Efficiency (%)
12.0500 0.0663 7.0780 0.5710 0.39 50.6
12.0400 0.0957 7.0770 0.1057 0.40 64.9
12.0500 0.1872 7.0760 0.2569 0.44 80.6
12.0200 0.3384 7.0740 0.5052 0.49 87.9
11.9900 0.4917 7.0710 0.7563 0.55 90.7
12.0400 0.6429 7.0690 1.0074 0.62 92.0
12.0000 0.7974 7.0670 1.2550 0.70 92.7
12.0200 0.9514 7.0650 1.5050 0.80 93.0
11.9900 1.1097 7.0620 1.7540 0.92 93.1
12.0500 1.2550 7.0600 2.0050 0.97 93.6
12.0200 1.4190 7.0580 2.2560 1.13 93.4
11.9800 1.5830 7.0560 2.5040 1.30 93.2
Table 2-4 Efficiency Data, 48VIN, –7VOUT
Voltage (V) Current (A) Voltage (V) Current (A) Losses (W) Efficiency (%)
48.1000 0.0388 7.0800 0.0571 1.46 21.7
48.1000 0.0459 7.0790 0.1057 1.46 33.9
48.1000 0.0689 7.0780 0.2569 1.50 54.9
48.1000 0.1083 7.0760 0.5052 1.63 68.6
48.1000 0.1467 7.0750 0.7563 1.71 75.8
48.1000 0.1847 7.0730 1.0074 1.76 80.2
48.1000 0.2230 7.0710 1.2550 1.85 82.7
48.1000 0.2604 7.0700 1.5060 1.88 85.0
48.1000 0.2983 7.0680 1.7540 1.95 86.4
48.1000 0.3367 7.0670 2.0040 2.03 87.4
48.1000 0.3753 7.0660 2.2550 2.12 88.3
48.1000 0.4136 7.0650 2.5040 2.20 88.9