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ADDC02812DA データシート(PDF) 9 Page - Analog Devices |
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ADDC02812DA データシート(HTML) 9 Page - Analog Devices |
9 / 20 page ADDC02812DA/ADDC02815DA REV. A –9– OUTPUT VOLTAGE – % 5 4 0 101 105 102 103 104 3 2 1 Figure 19. 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 both pulled up and down by internal circuitry. Figures 20 and 21 show the typical source and sink capabilities of the status out- put. Refer to the paragraphs describing Pin 3 (ADJUST) for effect on status trip point. IOH – mA 5 4 0 0.7 1.4 0.9 1.2 3 2 1 Figure 20. Source Capability of Status Output IOL – mA 1.0 0.8 0 119 4 7 101316 0.6 0.4 0.2 Figure 21. Sink Capability of Status Output Pin 5 (VAUX) Pin 5 is referenced to the input return and provides a semi- regulated 13 V to 15 V dc voltage supply for miscellaneous system use. The maximum permissible current draw is 5 mA and the voltage varies with the auxiliary load as shown in Figure 22. ILOAD – mA 13.75 13.70 13.50 0 6.5 1.63 2.1 3.1 4.1 5.6 13.65 13.60 13.55 Figure 22. VAUX vs. Load @ 100 W 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 internally 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 (15 ms max before the con- verter is fully on). Pin 6 must be kept low for at least 2 milli- seconds to initiate a full soft start. Shorter off times will result in a partial soft start. Figure 23 shows the input characteristics of Pin 6. |
同様の部品番号 - ADDC02812DA |
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同様の説明 - ADDC02812DA |
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