TC649 _ BDTIC a Leading Distributor in China

TC649

The TC649 is a switch mode fan speed controller for use with brushless DC motors. 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 of 1.25V to 2.65V (typical) for 0% 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, or following a transient fault. 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 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 the Applications section for more information and system design guidelines. The TC649 is packaged in a space-saving 8-Pin PDIP, MSOP or a SOIC package and is available in the industrial temperature range.

Features

Temperature Proportional
Fan Speed for Acoustic Control and Longer Fan Life
Efficient PWM Fan Drive
3.0V to 5.5V Supply Range
Supports Any Fan Voltage!
Fault Detection Circuits Protect Against Fan Failure and Aid System Testing
Automatic Shutdown Mode for "Green" Systems
Supports Low Cost NTC/PTC Thermistors

Parameter

Parameter Name Value	Value
Device Description Fan Manager	Fan Manager
Typical Accuracy (°C) Depends on external thermistor	Depends on external thermistor
Max. Supply Current (µA) 1000	1000
Max. Accuracy @ 25°C (°C) Depends on external thermistor	Depends on external thermistor
Integrated Temp Sensor Yes	Yes
Fan Sense 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

Documents

TC649 Datasheet	Data Sheets	02/05/2013	374KB
AN770 - Linear Voltage Fan Speed Control Using Microchip?s TC64x Family (TC642, TC646, TC648)	AppNote	07/27/2004	203KB
AN771 - Suppressing Acoustic Noise in PWM Fan Speed Control Systems	AppNote	07/27/2004	276KB
TB063 - An Integrated Fan Speed Control Solution Can Lower System Costs, Reduce Acoustic Noise, Power Consumption and Enhance System Reliability	AppNote	02/24/2003	204KB
Analog & Interface Guide (Volume 2)	Brochures	10/11/2005	1067KB
Quick Guide to Microchip Development Tools	Brochures	10/15/2014	11223KB
Fan Control Function Pack Design Guide	Product Line Documents	08/23/2006	162KB
Fan Management Solutions Product Overview	Product Line Documents	08/23/2006	87KB
Fan Speed Controller and Fan Fault Detector Family	Product Line Documents	05/13/2003	245KB
Analog & Interface Product Selector Guide	Product Line Card	03/21/2016	4116KB
8-Pin SOIC/MSOP/TSSOP/DIP Evaluation Board User's Guide	User Guides	01/24/2006	1367KB
TC64X/TC64XB Fan Control Evaluation Board User's Guide	User Guides	11/24/2003	360KB
Thermistor Value Calculator with Solver for the TC64x Family	User Guides	11/24/2003	130KB
Thermistor Value Calculator without Solver for the TC64x Family	User Guides	11/24/2003	107KB

Ordering Information

Part Number	Leads	Package Type	Temp Range	Packing	1+	26+	100+	1000+	5000+
TC649EOA	8	SOIC	-40C to +85C	TUBE	1.40	1.16	1.06	1.02	1.01
TC649EOATR	8	SOIC	-40C to +85C	T/R	1.40	1.16	1.06	1.02	1.01
TC649EUA	8	MSOP	-40C to +85C	TUBE	1.30	1.09	0.99	0.95	0.94
TC649EUATR	8	MSOP	-40C to +85C	T/R	1.30	1.09	0.99	0.95	0.94
TC649VOA	8	SOIC	0C to +85C	TUBE	1.32	1.10	1.00	0.97	0.96
TC649VOATR	8	SOIC	0C to +85C	T/R	1.32	1.10	1.00	0.97	0.96
TC649VPA	8	PDIP	0C to +85C	TUBE	1.35	1.13	1.02	0.99	0.98
TC649VUA	8	MSOP	0C to +85C	TUBE	1.26	1.05	0.95	0.92	0.91

Similar Devices

Product	Description	Typical Accuracy (º)	Temp Range	Price5K
EMC2101		±0.5	-40 - +125	$0.79
EMC2300		±0.25	0 - 70	$1.24
EMC6D102		±0.25	0 - 70	$1.63
EMC6D103		±0.25	0 - 70	$1.80
EMC6D103S		±0.25	0 - 70	$1.80
EMC6W201		±0.25	0 - 70	$2.19
TC642	Fan Manager	Depends on external thermistor	-40 - +85	$1.02
TC642B	Fan Manager	Depends on external thermistor	-40 - +85	$0.84
TC646	Fan Manager	Depends on external thermistor	-40 - +85	$1.02
TC646B	Fan Manager	Depends on external thermistor	-40 - +85	$0.84
TC647	Fan Manager	Depends on external thermistor	-40 - +85	$0.94
TC647B	Fan Manager	Depends on external thermistor	-40 - +85	$0.84
TC648	Fan Manager	Depends on external thermistor	-40 - +85	$0.85
TC648B	Fan Manager	Depends on External Thermistor	-40 - +85	$0.79
TC649	Fan Manager	Depends on external thermistor	-40 - +85	$0.94
TC649B	Fan Manager	Depends on external thermistor	-40 - +85	$0.84
TC650	Fan Manager	1	-40 - +125	$1.26
TC651	Fan Manager	1	-40 - +125	$1.08
TC652	Fan Manager	1	-40 - +125	$1.36
TC653	Fan Manager	1	-40 - 125	$1.36
TC654	Dual SMBus Fan Manager	Depends on external thermistor	-40 - +85	$1.43
TC655	Dual SMBus Fan Manager	Depends on external thermistor	-40 - +85	$1.53
TC664	Single SMBus Fan Manager	Depends on external thermistor	-40 - +85	$1.27
TC665	Single SMBus Fan Manager	Depends on external thermistor	-40 - +85	$1.31
TC670	Predictive Fan Fault Detector	N/A	-40 - +85	$0.94

RoHS Information

PartNumber	DeviceWeight	ShippingWeight	LeadCount	PackageType	PackageWidth	SolderComposition	JEDECIndicator
TC649VPA	0.486700	0.900000	8	PDIP	.300in	Matte Tin	e3
TC649BEPA	0.486700	0.900000	8	PDIP	.300in	Matte Tin	e3
TC649BEOA	0.078000	0.160000	8	SOIC	.150In(3.90mm)	Matte Tin	e3
TC649BEOATR	0.078000	0.230303	8	SOIC	.150In(3.90mm)	Matte Tin	e3
TC649VOA	0.078000	0.160000	8	SOIC	.150In(3.90mm)	Matte Tin	e3
TC649EOA	0.078000	0.160000	8	SOIC	.150In(3.90mm)	Matte Tin	e3
TC649EOATR	0.078000	0.230303	8	SOIC	.150In(3.90mm)	Matte Tin	e3
TC649VOATR	0.078000	0.230303	8	SOIC	.150In(3.90mm)	Matte Tin	e3
TC649VUATR	0.025600	0.215600	8	MSOP	3x3mm	Matte Tin	e3
TC649VUA	0.025600	0.070000	8	MSOP	3x3mm	Matte Tin	e3
TC649BEUA	0.025600	0.070000	8	MSOP	3x3mm	Matte Tin	e3
TC649BEUATR	0.025600	0.215600	8	MSOP	3x3mm	Matte Tin	e3
TC649EUA	0.025600	0.070000	8	MSOP	3x3mm	Matte Tin	e3
TC649EUATR	0.025600	0.215600	8	MSOP	3x3mm	Matte Tin	e3