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Micro Cooling Fan power telemetry

Date: 2014-12-17   Click: 1524 Times

The correct use of "Micro Cooling Fan" telemetry end of the power of many high-current power supply has telemetry terminal (+ S, -S). Telemetry allows the power supply terminal is connected via an internal adjustment circuit test line and load, which affects the large current line drop compensation effect of load values. Figure 9-20 shows a proper connection with the load-side power telemetry. Figure test line and a large current load line separation, telemetry end direct detection voltage across the load. If high-current load line has 0.5V voltage drop through telemetry end, the internal power supply circuit to adjust the output voltage increase 0.5V line drop compensation, "Micro Cooling Fan" to ensure that the voltage rating of the load. General Power line drop compensation can load about 1.0V. This improved method is to use the power supply output voltage across the load to maintain an accurate voltage value. Telemetry cable end and the load should be shielded to avoid electromagnetic interference inside the power supply adjustment circuit. "Micro Cooling Fan" in the internal power supply, there is usually a resistor (see Figure 9-20) telemetry between the terminal and the power output, such as telemetry end due to carelessness and not connected to the load side, this resistance prevents the output voltage rise too high. If you do not have telemetry end, respectively, and the power supply should be positive and negative terminals shorted, then the power to work in the local detection.

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