TIDT350 October   2023

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Considerations
    3. 1.3 Dimensions
  6. 2Testing and Results
    1. 2.1 Efficiency and Load Regulation Graphs
      1. 2.1.1 Symmetrical Load
        1. 2.1.1.1 Efficiency and Loss
        2. 2.1.1.2 Load Regulation
      2. 2.1.2 Nonsymmetrical Load
        1. 2.1.2.1 One Output 50 mA, Other Output Varying
          1. 2.1.2.1.1 Efficiency
          2. 2.1.2.1.2 Loss
          3. 2.1.2.1.3 Load Regulation
            1. 2.1.2.1.3.1 Positive Output Voltage
            2. 2.1.2.1.3.2 Negative Output Voltage
        2. 2.1.2.2 One Output Loaded With 1 kΩ, Other Output is Varying
          1. 2.1.2.2.1 Efficiency
          2. 2.1.2.2.2 Loss
          3. 2.1.2.2.3 Load Regulation
            1. 2.1.2.2.3.1 Positive Output Voltage
            2. 2.1.2.2.3.2 Negative Output Voltage
      3. 2.1.3 Scaling the Output Voltage
    2. 2.2 Thermal Images
    3. 2.3 Bode Plots With Dynamic Voltage Scaling
  7. 3Waveforms
    1. 3.1 Switching
      1. 3.1.1 Switchnode SW-GND
      2. 3.1.2 SW to P_OUT (D1)
      3. 3.1.3 Waveform on D3 Referenced to N_OUT
    2. 3.2 Output Voltage Ripple
      1. 3.2.1 Positive Output Voltage (P_OUT)
      2. 3.2.2 Negative Output Voltage (N_OUT)
    3. 3.3 Input Voltage Ripple
    4. 3.4 Load Transients
    5. 3.5 Start-Up Sequence
    6. 3.6 Shutdown Sequence

2.3 Bode Plots With Dynamic Voltage Scaling

GUID-20230822-SS0I-FM6B-XWLF-VH8RXV2RLSCP-low.png Figure 2-14 Bode Plot
Table 2-2 Summary of Measurement 1
Measurement 1
Injection voltage TP8 open
Input voltage 5 V
Output voltage 14 V
Load current full load
Bandwidth 3.9 kHz
Phase margin 68°
Gain margin 29 dB
Table 2-3 Summary of Measurement 2
Measurement 2
Injection voltage TP8 3.3 V
Input voltage 5 V
Output voltage 11 V
Load current full load
Bandwidth 3.9 kHz
Phase margin 69°
Gain margin 29 dB