TC647BEOA Power Management ICs - PMIC by Microchip Technology


The TC647B is a new version of the existing TC647 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. Minimum fan speed is set by a simple resistor divider on the VMIN input. An integrated Start-Up Timer ensures reliable fan motor start-up at turn-on, coming out of shutdown mode, or following a transient fault. A logic low applied to VIN, pin 1, causes fan shutdown.

The TC647B also features Microchip Technology's proprietary FanSenseâ„¢ 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 TC647B device to turn the VOUT output on full (100% duty cycle). If the fan fault persists (a fan current pulse is not detected within a 32/F period), the FAULT output goes low. Even with the FAULT output low, the VOUT output is on full during the fan fault condition in order to try and restart the fan.

Where to Buy

Prices starting from US$0.67

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Features

Temperature Proportional Fan Speed for Acoustic Control and Longer Fan Life
FanSenseâ„¢ Protects Against Fan Failure
Efficient PWM Drive
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
Fan Auto-Restart

Specifications

Device Description Fan Manager
Typical Accuracy (°C) Depends on external thermistor
Over Temp Alert False
SM Bus False
Predictive Fan Fault False
Max. Supply Current (µA) 400
Max Accuracy @ 25°C (°C) Depends on external thermistor
Integrated temp Sensor False
Fan Sense True
External Temp Input True
Auto Shutdown True
PWMFreq Low
FanSpeedTable No
Temp. Range Max. (°C) +85
Temp. Range. Min. (°C) -40
Vcc Range Max. (V) +5.5
Vcc Range Min. (V) +3.0
Pins | Packaging 8 | SOIC
Temp Range -40C to +85C
Packing Media Tube (100)

Resources





Environmental Information

JEDEC Indicator e3
ROHS Compliant
China EFUP Compliant
Device Weight (g) 0.078
Shipping Weight (kg) 0.25
Lead Count 8
Package Type SOIC
Package Width or Size .150In(3.90mm)
Soldering Composition Matte Tin

Alternative Descriptions

PWM Fan speed Controller | Microchip Technology
PWM Fan Speed Controller Restart SOIC8 | RS
Motor Driver, Pwm, 5Ma, Soic-8 | Newark Electronics
TC647 Series 5.5 V PWM Fan Speed Controller w/ Fault Detection - SOIC-8 | Future Electronics
PWM Fan Motor Speed Controller 8-Pin SOIC N Tube | Avnet America
Microchip TC647BEOA Fan Controller IC, 8-Pin SOIC | Microchip Technology Inc. TC647BEOA | RS Americas
IC, PWM, FAN SPEED CNTRL, 8-SOIC | Farnell


Frequently Asked Questions

Where can I find additional details, specifications and documents for a TC647BEOA?

Additional datasheets, footprints and schematics for TC647BEOA are listed on our Part Details page. You can also find images and similar parts to TC647BEOA on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for TC647BEOA on our Product Comparison page. Access via the 'View Pricing & Stock' button to view TC647BEOA price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does TC647BEOA fall under?

The TC647BEOA is listed under Semiconductors - ICs > Power Management ICs - PMIC > Drivers & Controllers > Motor Drivers / Controllers.

Can I view similar or alternative parts?

You can view similar parts to TC647BEOA when available in the Motor Drivers / Controllers range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the TC647BEOA you can contact the distributor directly for product support, shipping queries etc.

Is the TC647BEOA RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Microchip Technology.

Which authorised distributors for TC647BEOA have stock available?

Authorised distributors including Microchip Technology, RS, Newark Electronics, Future Electronics and Avnet America have stock available or on a lead time for TC647BEOA.

How do I check stock and lead times for all distributors?

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