TIDT277 April   2022

 

  1.   Description
  2.   Features
  3.   Applications
  4. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Considerations
    3. 1.3 Dimensions
  5. 2Testing and Results
    1. 2.1 Efficiency Graphs, all Outputs Similar Loaded
    2. 2.2 Load Regulation
    3. 2.3 Cross Regulation and Further Data For Non-Symmetrical Loading
    4. 2.4 Line Regulation at Full Load to all Outputs
    5. 2.5 Thermal Images
  6. 3Waveforms
    1. 3.1 Switching
      1. 3.1.1 Switchnode to GND
      2. 3.1.2 Diode D3
    2. 3.2 Output Voltage Ripple
    3. 3.3 Input Voltage Ripple
      1. 3.3.1 Power Stage Input
      2. 3.3.2 Between L1 and L2
      3. 3.3.3 Input Terminal
    4. 3.4 Start-Up Sequence
    5. 3.5 Shutdown Sequence

3.5 Shutdown Sequence

Shutdown behavior of channel U is shown in the following figure.

GUID-20220405-SS0I-BDDH-DMMB-LH7SCHWGXWXR-low.jpg

Ch1

Input voltage

5 V / div


                                
Ch2

                                
+17
                                        VOUT

                                
10 V / div

                                

                                
Ch3

                                
-4
                                    VOUT

                                
10 V / div

                                

                                
20 MHz
                                    bandwidth

                                
2 ms / div

                            		
                        

                    

            

                

                    
                Figure 3-9 Shutdown Channel U