TC646BEOA - Microchip

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

TC646BEOA
Manufacturer

Microchip
ChipWorker Part#

CW12688333
Category

Motor Driver
Package

SOIC-8
Description

MICROCHIP TC646BEOA Motor Driver/Controller, PWM, 3V to 5.5V supply, 4.4V/5mA/1 Output, SOIC-8
Documentation

Datasheet

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TC646BEOA Specifications

Attribute	Attribute Value

Part Number	TC646BEOA
Manufacturer	Microchip
ChipWorker Part#	CW12688333
Category	Motor Driver
Documentation	Datasheet
Mounting Style	Surface Mount
Number of Pins	8 Pin
Case/Package	SOIC-8
Frequency	30.0 Hz
Supply Voltage (DC)	3.00V (min)
Number of Outputs	1 Output
Input Voltage (DC)	5.50 V
Output Voltage	4.4 V
Output Current	5 mA
Supply Current	400 µA
Number of Channels	1 Channel
Number of Positions	8 Position
Thermal Resistance	200 ℃/W
Operating Temperature (Max)	85 ℃
Operating Temperature (Min)	-40 ℃
Supply Voltage	3V ~ 5.5V
Supply Voltage (Max)	5.5 V
Supply Voltage (Min)	3 V
Input Voltage	5.8 V
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Size-Length	5 mm
Size-Width	3.99 mm
Size-Height	1.55 mm
Operating Temperature	-40℃ ~ 85℃
Product Lifecycle Status	Active
Packaging	Tube
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
REACH SVHC Compliance	No SVHC
REACH SVHC Compliance Edition	2015/12/17
HTS Code	8542390001
ECCN Code	EAR99

Product Description

The TC646BEOA is a switch-mode PWM Fan Speed Controller with an auto-shutdown for use with brushless DC fans. Temperature proportional speed control is accomplished using pulse width modulation. A thermistor connected to the VIN input furnishes the required control voltage of 1.25 to 2.65V for 0 to 100% PWM duty cycle. It automatically suspends fan operation when measured temperature is below user programmed minimum setting. 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. It features Microchip Technology"s proprietary FanSense™ technology for increasing system reliability. In normal fan operation, a pulse train is present at SENSE. A missing-pulse detector monitors this pin during fan operation. A stalled, open or unconnected fan causes the TC646 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.
Temperature proportional fan speed for acoustic control and longer fan life
Efficient PWM fan drive
FanSense™ Fault detection circuit protects against fan failure and aids system testing
Shutdown mode for green systems
Supports NTC/PTC thermistors
Over-temperature indication

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