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TC647 Datasheet(PDF) 6 Page - Microchip Technology |
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TC647 Datasheet(HTML) 6 Page - Microchip Technology |
6 / 28 page TC647 DS21447C-page 6 2002 Microchip Technology Inc. Continuous restart mode is enabled by connecting the FAULT output to VMIN through a 0.1 µF capacitor, as shown in Figure 3-1. When so connected, the TC647 automatically attempts to restart the fan whenever a fault condition occurs. When the FAULT output is driven low, the VMIN input is momentarily pulled below VSHDN, initiating a reset and clearing the fault condition. Normal fan start-up is then attempted as pre- viously described. The FAULT output may be connected to external logic (or the interrupt input of a microcontroller) to shut the TC647 down if multiple fault pulses are detected at approximately one second intervals. FIGURE 3-1: Fan Fault Output Circuit. FAULT SENSE R1 10 k Ω 1 k Ω GND From System Shutdown Controller (Optional) Note: The parallel combination of R3 and R4 must be >10 kΩ. +12V +5V +5V VDD VIN VMIN VOUT RBASE RSENSE CSENSE CF 1 µF CF TC647 Fan CB 0.01 µF 0.01µF 1 8 CB 1µF 6 7 5 4 2 3 From Temp Sensor +5V 1 0 TC647 RESET Fault Detected C1 Q1 Q2 R3 R4 |
Número de pieza similar - TC647 |
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Descripción similar - TC647 |
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