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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TC649 датащи(PDF) 4 Page - Microchip Technology |
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TC649 датащи(HTML) 4 Page - Microchip Technology |
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4 / 28 page  TC649 DS21449D-page 4 2001-2012 Microchip Technology Inc. 2.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 2-1. TABLE 2-1: PIN FUNCTION TABLE 2.1 Analog Input (VIN) The thermistor network (or other temperature sensor) connects to the VIN input. A voltage range of 1.25V to 2.65V (typical) on this pin drives an active duty cycle of 0% to 100% on the VOUT pin. The TC649 enters shut- down mode when VIN VSHDN. During shutdown, the FAULT output is inactive, and supply current falls to 25 µA (typical). The TC649 exits shutdown mode when VIN VREL. See Section 5.0, “Typical Applications”, for details. 2.2 Analog Output (CF) CF is the positive terminal for the PWM ramp generator timing capacitor. The recommended CF is 1 µF for 30 Hz PWM operation. 2.3 Analog Input (VAS) An external resistor divider connected to the VAS input sets the auto-shutdown threshold. Auto-shutdown occurs when VIN VAS. The fan is automatically restarted when VIN (VAS + VHAS). See Section 5.0, “Typical Applications”, for more details. 2.4 Ground (GND) GND denotes the ground terminal. 2.5 Analog Input (SENSE) Pulses are detected at the SENSE pin as fan rotation chops the current through a sense resistor (RSENSE). The absence of pulses indicates a fault. See Section 5.0, “Typical Applications”, for more details. 2.6 Digital Output (FAULT) The FAULT line goes low to indicate a fault condition. When FAULT goes low due to a fan fault condition, the device is latched in shutdown mode until deliberately cleared or until power is cycled. 2.7 Digital Output (VOUT) VOUT is an active high complimentary output that drives the base of an external NPN transistor (via an appropri- ate base resistor) or the gate of an N-channel MOSFET. This output has asymmetrical drive (see Section 1.0, “Electrical Characteristics”). 2.8 Power Supply Input (VDD) VDD may be independent of the fan’s power supply (see Section 1.0, “Electrical Characteristics”). Pin No. Symbol Descriptiion 1VIN Analog Input 2CF Analog Output 3VAS Analog Input 4 GND Ground Terminal 5 SENSE Analog Input 6FAULT Digital (Open Collector) Output 7VOUT Digital Output 8VDD Power Supply Input |
Аналогичный номер детали - TC649_13 |
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Аналогичное описание - TC649_13 |
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