Details, datasheet, quote on part number: TC649VPA
PartTC649VPA
CategorySensors => Temperature Sensors => Fan Controllers/Fan Fault Detectors
TitleFan Controllers/Fan Fault Detectors
DescriptionThe TC649 is a Switch Mode Fan Speed Controller For Use With Brushless DC Motors
CompanyMicrochip Technology, Inc.
DatasheetDownload TC649VPA datasheet
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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 TC649 Supply Voltage - Supports any Fan Voltage FanSenseTM Fault Detection Circuits Protect Against Fan Failure and Aid System Testing Automatic Shutdown Mode for "Green" Systems Supports Low Cost NTC/PTC Thermistors Space Saving 8-Pin MSOP Package

PWM Fan Speed Controller with Auto-Shutdown and FanSenseTM Technology

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 the VIN input furnishes the required control voltage to 2.65V (typical) for to 100% PWM duty cycle. The TC649 automatically suspends fan operation when measured temperature (VIN) is below a user programmed minimum setting (VAS). An integrated Start-up Timer ensures reliable motor start-up at turn-on, coming out of shutdown mode, auto-shutdown mode or following a transient fault. In normal fan operation, a pulse train is present at SENSE (Pin 5). The TC649 features Microchip Technology's proprietary FanSenseTM technology for increasing system reliability. A missing pulse detector monitors this pin during fan operation. A stalled, open or unconnected fan causes the TC649 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. See Section 5.0, "Typical Applications", for more information and system design guidelines. The TC649 is available in the 8-pin PDIP, SOIC and MSOP packages and is available in the industrial and extended commercial temperature ranges.

Applications

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

Start-up Timer + SHDN Missing Pulse Detect

*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 (RJA).......................................... 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 tR tF tSHDN IOL IOH Parameter Supply Voltage Supply Current, Operating Supply Current, Shutdown/ Auto-shutdown Mode VIN, VAS Input Leakage VOUT Rise Time VOUT Fall Time Pulse Width (On VIN ) to Clear Fault Mode Sink Current at VOUT Output Source Current at V OUT Output Min 3.0 -1.0 Typ 0.5 25 Max 5.5 1.0 Units mA A Pins 6, 7 Open, = 1 F, VIN = VC(MAX) Pins 6, 7 Open; Note CF =1 F, VIN = 0.35V Test Conditions

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 Note 1

SENSE Input VTH(SENSE) SENSE Input threshold Voltage with Respect to GND FAULT Output VOL tMP tSTART tDIAG VC(MAX) VC(SPAN) VAS VSHDN VREL VHYST VHAS Output Low Voltage Missing Pulse Detector Timer Start-up Timer Diagnostic Timer 0.3 V Sec IOL 90 mV

VIN , VAS Inputs Voltage at VIN for 100% Duty Cycle VC(MAX) - VC(MIN) Auto-shutdown Threshold Voltage applied to VIN to Release Reset/Shutdown Voltage applied IN to Release Reset Mode Hysteresis on V SHDN, VREL Hysteresis on Auto-shutdown Comparator 2.5 1.3 VC(MAX) -VC(SPAN) VDD x VDD 2.8 1.5 VC(MAX) VDD 0.13 mV VDD = 5V, See Figure 5-11

Pulse Width Modulator FOSC PWM Frequency 1.0 F Note 1: Ensured by design, not tested.

 

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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
TC6501P105VCTTR The TC650/651 Are Integrated Temperature Sensors And Brushless DC Fan Speed Controllers
TC6501P115VCT The TC6501 Through TC6504 Are SOT-23 Temperature Switches That Require no External Components And The Design is Facilitated With Factory Programmed Temperature Thresholds
TC6501P115VCTTR The TC650/651 Are Integrated Temperature Sensors And Brushless DC Fan Speed Controllers
TC6501P125VCT The TC6501 Through TC6504 Are SOT-23 Temperature Switches That Require no External Components And The Design is Facilitated With Factory Programmed Temperature Thresholds
TC6501P125VCTTR The TC650/651 Are Integrated Temperature Sensors And Brushless DC Fan Speed Controllers
TC6502 The TC6501 Through TC6504 Are SOT-23 Temperature Switches That Require no External Components And The Design is Facilitated With Factory Programmed Temperature Thresholds
TC6502N015VCTTR The TC650/651 Are Integrated Temperature Sensors And Brushless DC Fan Speed Controllers
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