Details, datasheet, quote on part number: TC647EPA
PartTC647EPA
CategoryPower Management => PWM Controllers
DescriptionPWM Fan Speed Controller With Fansense Technology
CompanyMicrochip Technology, Inc.
DatasheetDownload TC647EPA datasheet
Quote
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Features, Applications
Features

Temperature Proportional Fan Speed for Acoustic Control and Longer Fan Life Efficient PWM Fan Drive to 5.5V Supply Range: - Fan Voltage Independent of TC647 Supply Voltage - Supports any Fan Voltage FanSenseTM Technology Fault Detection Circuits Protect Against Fan Failure and Aid System Testing Shutdown Mode for "Green" Systems Supports Low Cost NTC/PTC Thermistors Space Saving 8-Pin MSOP Package

The is a switch mode, fan speed controller for use with brushless DC fans. Temperature proportional speed control is accomplished using pulse width modulation (PWM). A thermistor (or other voltage output temperature sensor) connected to VIN furnishes the required control voltage to 2.65V (typical) for to 100% PWM duty cycle. Minimum fan speed is set by a simple resistor divider on the VMIN input. An integrated Start-up Timer ensures reliable motor startup at turn-on, coming out of shutdown mode or following a transient fault. A logic low applied to V MIN (Pin 3) causes fan shutdown. The TC647 also features Microchip Technology's proprietary FanSenseTM technology for increasing system reliability. In normal fan operation, a pulse train is present at SENSE (Pin 5). A missing pulse detector monitors this pin during fan operation. A stalled, open or unconnected fan causes the TC647 to trigger its Start-up Timer once. If the fault persists, the FAULT output goes low and the device is latched in its shutdown mode. The TC647 is available in the 8-pin plastic DIP, SOIC and MSOP packages and is available in the industrial and extended commercial temperature ranges.

Applications

Power Supplies Personal Computers File Servers Telecom Equipment UPSs, Power Amps General Purpose Fan Speed Control

3 x TPWM Timer Clock Generator VMIN VSHDN Start-up Timer FAULT

*Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Supply Voltage......................................................... 6V Input Voltage, Any Pin.... (GND 0.3V) to (VDD +0.3V) Package Thermal Resistance: PDIP (RJA)............................................. 125C/W SOIC (RJA)............................................ 155C/W MSOP (R JA).......................................... 200C/W Specified Temperature Range........... to +125C Storage Temperature Range.............. to +150C

Electrical Characteristics: Unless otherwise specified, TMIN TA < TMAX, VDD to 5.5V. Symbol VDD IDD IDD(SHDN) IIN VOUT Output tR tF tSHDN IOL IOH VIN , VMIN Inputs VC(MAX) VC(SPAN) VSHDN VREL Input Voltage at VIN or VMIN for 100% PWM Duty Cycle VC(MAX) - VC(MIN) Voltage Applied to VMIN to Ensure Shutdown Mode Voltage Applied to VMIN to Release Shutdown Mode 2.5 1.3 VDD x VDD x 0.13 VDD = 5V VOUT Rise Time VOUT Fall Time Pulse Width (On VMIN ) to Clear Fault Mode Sink Current at VOUT Output Source Current at VOUT Output sec mA IOH = 5 mA, Note 1 IOL = 1 mA, Note 1 VSHDN, VHYST Specifications, Note 1 VOL 10% of VDD VOH 80% of VDD Parameter Supply Voltage Supply Current, Operating Supply Current, Shutdown Mode VIN , VMIN Input Leakage Min 1.0 Typ 0.5 25 Max 5.5 1 Units mA A Pins 6, 7 Open, = 1 F, VIN = VC(MAX) Pins 6, 7 Open, = 1 F, VMIN = 0.35V Note 1 Test Conditions

Pulse Width Modulator FPWM SENSE Input VTH(SENSE) FAULT Output VOL tMP tSTARTUP tDIAG Output Low Voltage Missing Pulse Detector Timer Start-up Timer Diagnostic Timer 0.3 V Sec IOL 2.5 mA SENSE Input Threshold Voltage with Respect to GND 90 mV Note 1 PWM Frequency 1.0 F


 

Some Part number from the same manufacture Microchip Technology, Inc.
TC647EUA The TC647 is a Switch Mode Fan Speed Controller For Use With Brushless DC Motors
TC648 The TC648 is a Switch Mode Fan Speed Controller For Use With Brushless DC Motors
TC648B The TC646B is a Version of The Existing TC646 Fan Speed Controller
TC648E The TC648 is a Switch Mode Fan Speed Controller For Use With Brushless DC Motors
TC649 The TC649 is a Switch Mode Fan Speed Controller For Use With Brushless DC Motors
TC649B The TC646B is a Version of The Existing TC646 Fan Speed Controller
TC649E The TC649 is a Switch Mode Fan Speed Controller For Use With Brushless DC Motors
TC649EPA PWM Fan Speed Controller With Auto-shutdown And Fansense Technology
TC649EUA The TC649 is a Switch Mode Fan Speed Controller For Use With Brushless DC Motors
TC650 The TC650/651 Are Integrated Temperature Sensors And Brushless DC Fan Speed Controllers
TC6501 The TC6501 Through TC6504 Are SOT-23 Temperature Switches That Require no External Components And The Design is Facilitated With Factory Programmed Temperature Thresholds
TC6501N015VCTTR The TC650/651 Are Integrated Temperature Sensors And Brushless DC Fan Speed Controllers
TC6501P045VCT The TC6501 Through TC6504 Are SOT-23 Temperature Switches That Require no External Components And The Design is Facilitated With Factory Programmed Temperature Thresholds
TC6501P045VCTTR The TC650/651 Are Integrated Temperature Sensors And Brushless DC Fan Speed Controllers
TC6501P065VCT The TC6501 Through TC6504 Are SOT-23 Temperature Switches That Require no External Components And The Design is Facilitated With Factory Programmed Temperature Thresholds
TC6501P065VCTTR The TC650/651 Are Integrated Temperature Sensors And Brushless DC Fan Speed Controllers
TC6501P075VCT The TC6501 Through TC6504 Are SOT-23 Temperature Switches That Require no External Components And The Design is Facilitated With Factory Programmed Temperature Thresholds
TC6501P075VCTTR The TC650/651 Are Integrated Temperature Sensors And Brushless DC Fan Speed Controllers
TC6501P095VCT The TC6501 Through TC6504 Are SOT-23 Temperature Switches That Require no External Components And The Design is Facilitated With Factory Programmed Temperature Thresholds
TC6501P095VCTTR The TC650/651 Are Integrated Temperature Sensors And Brushless DC Fan Speed Controllers
TC6501P105VCT The TC6501 Through TC6504 Are SOT-23 Temperature Switches That Require no External Components And The Design is Facilitated With Factory Programmed Temperature Thresholds
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