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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AD5100EVAL датащи(PDF) 30 Page - Analog Devices |
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AD5100EVAL датащи(HTML) 30 Page - Analog Devices |
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30 / 32 page  AD5100 Preliminary Technical Data Rev. PrJ | Page 30 of 32 Battery Monitoring with Fan Control V4MON can be used with V4OUT intandem to form a simple PWM control circuit. For example as shown in Figure 27, when a temperature sensor output connects to the V4MON input, with the proper threshold level set, V4OUT outputs high whenever the temperature goes above the threshold. This turns on the FET switch which activates the fan. When Vtemp drops below the threshold, V4OUT decreases which turns off the fan. AD5100 V 1MON V 2MON V 3MON V 4MON Battery Ignition Vreg Vtemp μP SHDN RESET V 4OUT SD_WRN SCL SDA CLK SD VREG CLK MISO/MOSI TMP35 Vtemp Battery PA Vreg /MR /MR WDI WDI /MR WDI AD5100 V 1MON V 2MON V 3MON V 4MON Battery Ignition Vreg Vtemp μP SHDN RESET V 4OUT SD_WRN SCL SDA CLK SD VREG CLK MISO/MOSI TMP35 Vtemp Battery PA Vreg /MR /MR WDI WDI /MR WDI Figure 27. Power Amp Monitoring and Fan Control V TEMP V 4OUT Note: V 4MON reset disabled V 4MON Threshold V TEMP V 4OUT Note: V 4MON reset disabled V 4MON Threshold Figure 28. V4OUT with respect to Vtemp withV4MON reset disabled in circuit shown in Figure 27. Battery State of Charge Indicator and Shutdown Early Warning Monitoring In the automotive application, the system designer may set the battery threshold to the lowest level in order to allow an automobile to start at the worst case condition. If the battery remains at the low voltage level, it is indeed a poor battery. However, there is no way to warn the driver. As a result, the system designer may use V4OUT as the battery warning indicator. By stepping down the battery voltage monitored at V4MON, the LED is lit which gives a battery replacement warning. The circuit is shown in Figure 29. AD5100 V 2MON V 1MON V 4MON Ignition Battery μP V 4OUT SCL SDA CLK CLK MISO/MOSI SD_WRN SHDN AD5100 V 2MON V 1MON V 4MON Ignition Battery μP V 4OUT SCL SDA CLK CLK MISO/MOSI SD_WRN SHDN Figure 29. Battery State of Charge Indication |
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