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ADDC02828SAKV Folha de dados(PDF) 8 Page - Analog Devices |
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ADDC02828SAKV Folha de dados(HTML) 8 Page - Analog Devices |
8 / 16 page ADDC02828SA REV. 0 –8– OUTPUT VOLTAGE – % 5 4 0 101 105 102 103 104 3 2 1 Figure 17. External Resistor Value for Increasing Output Voltage With regard to the range that the output voltage can be adjusted by the user, there are two concerns. As the output voltage is raised it may become difficult to maintain regulation at full power and low input voltage. As the output voltage is lowered, it may become difficult to maintain regulation at minimum power and high input line. Pin 4 (STATUS) Pin 4 is active high referenced to –SENSE (Pin 1), indicating that the output voltage is typically within ± 5%. The pin is pulled both up and down by internal circuitry. Figures 18 and 19 show the typical source and sink capabilities of the status output. Refer to the paragraphs describing Pin 3 (ADJUST) for effect on status trip point. IOH – mA 5 4 0.2 0.4 0.6 0.8 1 1.2 1.4 3 2 0 1 Figure 18. Source Capability of Status Output IOL – mA 1.0 0.8 0.0 1.0 19.0 4.0 7.0 10.0 13.0 16.0 0.6 0.4 0.2 Figure 19. Sink Capability of Status Output Pin 5 (VAUX) Pin 5 is referenced to the input return and provides a semi- regulated 11 V to 14 V dc voltage supply for miscellaneous system use. The maximum permissible current draw is 5 mA and the voltage varies with the output load of the converter as shown in Figure 20. CONVERTER OUTPUT CURRENT – Amps 14 01 2 3 4 13 12 10 11 28VIN Figure 20. VAUX vs. Load Pin 6 (INHIBIT) Pin 6 is active low and is referenced to the input return of the converter. Connecting it to the input return will turn the converter off. For normal operation, the inhibit pin is inter- nally pulled up to 12 V. Use of an open collector circuit is recommended. When Pin 6 is disconnected from input return, the converter will restart in the soft-start mode. Pin 6 must be kept low for at least 2 milliseconds to initiate a full soft start. Shorter off times will result in a partial soft start. Figure 21 shows the input characteristics of Pin 6. |
Nº de peça semelhante - ADDC02828SAKV |
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Descrição semelhante - ADDC02828SAKV |
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