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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TC648 датащи(PDF) 1 Page - Microchip Technology |
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TC648 датащи(HTML) 1 Page - Microchip Technology |
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1 / 28 page  2001-2012 Microchip Technology Inc. DS21448D-page 1 TC648 Features • Temperature Proportional Fan Speed for Acoustic Control and Longer Fan Life • Efficient PWM Fan Drive • 3.0V to 5.5V Supply Range: - Fan Voltage Independent of TC648 Supply Voltage - Supports any Fan Voltage • Over-temperature Fault Detection • Automatic Shutdown Mode for “Green” Systems • Supports Low Cost NTC/PTC Thermistors • Space Saving 8-Pin MSOP Package Applications • Power Supplies • Computers • Portable Computers • Telecom Equipment • UPSs, Power Amps • General Purpose Fan Speed Control Available Tools • Fan Controller Demonstration Board (TC642DEMO) • Fan Controller Evaluation Kit (TC642EV) Package Types General Description The TC648 is a switch mode, fan speed controller for use with brushless DC fans. Temperature proportional speed control is accomplished using pulse width mod- ulation (PWM). A thermistor (or other voltage output temperature sensor) connected to the VIN input furnishes the required control voltage of 1.25V to 2.65V (typical) for 0% to 100% PWM duty cycle. The TC648 can be configured to operate in either auto-shutdown or minimum speed mode. In auto-shutdown mode, fan operation is automatically suspended when measured temperature (VIN) is lower than a user programmed minimum setting (VAS). The fan is automatically restarted, and proportional speed control restored, when VIN exceeds VAS (plus hysteresis). Operation in minimum speed mode is similar to auto-shutdown mode, with the exception that the fan is operated at a user programmed minimum setting when the mea- sured temperature is low. An integrated Start-up Timer ensures reliable motor start-up at turn-on, and when coming out of shutdown or auto-shutdown mode. The over-temperature fault output (OTF) is asserted when the PWM reaches 100% duty cycle, indicating a possible thermal runaway situation. The TC648 is available in the 8-pin plastic DIP, SOIC and MSOP packages and is available in the industrial and extended commercial temperature ranges. 18 27 36 45 TC648 GND CF VIN VAS OTF NC VDD VOUT SOIC/PDIP/MSOP Fan Speed Controller with Auto-Shutdown and Over-Temperature Alert |
Аналогичный номер детали - TC648_13 |
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Аналогичное описание - TC648_13 |
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ссылки URL |
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