TC648B

The TC648B is a new version of the existing TC648 fan speed controller. This device is a switch mode fan speed controller, which incorporates a new fan auto restart function. Temperature proportional speed control is accomplished using pulse width modulation. A thermistor (or other voltage output temperature sensor) connected to the VIN input supplies the required control voltage of 1.20V to 2.60V (typical) for 0% to 100% PWM duty cycle. The auto-shutdown speed is set by a simple resistor divider on the VAS input. An integrated Start-Up Timer ensures reliable fan motor start-up at turn-on, coming out of shutdown mode, auto-shutdown mode, or following a transient fault. A logic low applied to VIN, pin 1, causes fan shutdown. The OTF signal is asserted if the PWM reaches 100% duty cycle, indicating that maximum cooling capability has been reached and a possible thermal runaway condition exists.

产品特性
  • Temperature Proportional Fan Speed for Acoustic Control and Longer Fan Life
  • Over-Temperature Indication
  • Efficient PWM Drive
  • Automatic Shutdown Mode for "Green" Systems
  • 3.0V to 5.5V Supply Range
  • Fan Voltage Independent of Supply Voltage – Supports Any Fan Voltage
  • Supports Low Cost NTC/PTC Thermistors
技术参数
Parameter Name Value Value
Device Description Fan Manager Fan Manager
Typical Accuracy (°C) Depends on External Thermistor Depends on External Thermistor
Over Temp Alert yes yes
Max. Supply Current (µA) 400 400
Max. Accuracy @ 25°C (°C) Depends on External Thermistor Depends on External Thermistor
External Temp Input Yes Yes
Auto Shutdown Yes Yes
High/Low PWM Freq Low Low
Temp Range (°C) -40 to +85 -40 to +85
Vcc Range (V) +3.0 to +5.5 +3.0 to +5.5
文档资料
TC646B/TC648B/TC649B DatasheetData Sheets02/05/2013552KB
AN770 - Linear Voltage Fan Speed Control Using Microchip?s TC64x Family (TC642, TC646, TC648)AppNote07/27/2004203KB
AN771 - Suppressing Acoustic Noise in PWM Fan Speed Control SystemsAppNote07/27/2004276KB
TB063 - An Integrated Fan Speed Control Solution Can Lower System Costs, Reduce Acoustic Noise, Power Consumption and Enhance System ReliabilityAppNote02/24/2003204KB
Analog & Interface Guide (Volume 2)Brochures10/11/20051067KB
Quick Guide to Microchip Development ToolsBrochures10/15/201411223KB
Fan Control Function Pack Design GuideProduct Line Documents08/23/2006162KB
Fan Management Solutions Product OverviewProduct Line Documents08/23/200687KB
Fan Speed Controller and Fan Fault Detector FamilyProduct Line Documents05/13/2003245KB
Analog & Interface Product Selector GuideProduct Line Card03/21/20164116KB
8-Pin SOIC/MSOP/TSSOP/DIP Evaluation Board User's GuideUser Guides01/24/20061367KB
TC64X/TC64XB Fan Control Evaluation Board User's GuideUser Guides11/24/2003360KB
Thermistor Value Calculator with Solver for the TC64x FamilyUser Guides11/24/2003130KB
Thermistor Value Calculator without Solver for the TC64x FamilyUser Guides11/24/2003107KB
订购型号
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
TC648BEOA8SOIC-40C to +85CTUBE1.090.910.820.800.79
TC648BEOA7138SOIC-40C to +85CT/R1.090.910.820.800.79
TC648BEPA8PDIP-40C to +85CTUBE1.231.020.930.900.89
TC648BEUA8MSOP-40C to +85CTUBE1.130.940.860.830.82
TC648BEUA7138MSOP-40C to +85CT/R1.130.940.860.830.82
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器件无铅环保信息
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
TC648BEPA0.4867000.9000008PDIP.300inMatte Tine3
TC648BEOA0.0780000.1600008SOIC.150In(3.90mm)Matte Tine3
TC648BEOA7130.0780000.2303038SOIC.150In(3.90mm)Matte Tine3
TC648BEUA0.0256000.0700008MSOP3x3mmMatte Tine3
TC648BEUA7130.0256000.2156008MSOP3x3mmMatte Tine3
TC646B/TC648B/TC649B Datasheet TC649B
TC646B/TC648B/TC649B Datasheet TC649B
AN770 TC649B
AN771 TC649B
TB063 TC649B
Analog & Interface Guide (Volume 2) MCP23S08
Quick Guide to Microchip Development Tools ENC28J60
Fan Control Function Pack Design Guide TC670
Fan Management Solutions Product Overview TC670
Fan Speed Controller and Fan Fault Detector Family TC665
Analog & Interface Product Selector Guide ENC624J600
8-Pin SOIC/MSOP/TSSOP/DIP Evaluation Board User's Guide SOIC8EV
TC64X/TC64XB Fan Control Evaluation Board User's Guide TC649B
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