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TC642, TC642COA, TC642VOA

Table of contents:
Info of TC642
Info of TC642COA
Info of TC642VOA

TC642, TC642COA, TC642VOA Selling Leads, Datasheet

MFG:Microchip Technology Category:Integrated Circuits (ICs) Package Cooled:SMD-8 D/C:09+

TC642, TC642COA, TC642VOA Datasheet download

Five Points

Part Number: TC642COA

Category: Integrated Circuits (ICs)

MFG: Microchip Technology

Package Cooled: SMD-8

D/C: 09+

Description: IC PWM FAN SPEED CONTRLR 8-SOIC

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TC642 General Description

The TC642 is a switch mode fan speed controller for use with brushless DC motors. Temperature proportional speed control is accomplished using pulse width modulation. A thermistor (or other voltage output temperature sensor) connected to the VIN input furnishes the required control voltage of 1.25Vto 2.65V (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 motor start-up at turn-on, coming out of Shutdown Mode, or following a transient fault. A logic low applied to VMIN, pin 3, causes fan shutdown. The TC642 also features Microchip Technology's proprietary FanSense? technology for increasing system reliability. In normal fan operation, a pulse train is present at SENSE, pin 5, indicating normal operation. A missing-pulse detector monitors this pin during normal fan operation. A stalled, open, or unconnected fan causes the TC642 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. FAULT is also asserted if the PWM reaches 100%

TC642 Maximum Ratings

Parameter Name	Value
Typical Accuracy (°C)	Depends on external thermistor
Over Temp Alert	yes
SM Bus	NO
Predictive Fan Fault	NO
Max. Supply Current (A)	1000
Max. Accuracy @ 25°C (°C)	Depends on external thermistor
Integrated Temp Sensor	No
Fan Sense	Yes
External Temp Input	Yes
Auto Shutdown	No
Device Description	Fan Manager
Temp Range (°C)	-40 to +85
Vcc Range (V)	+3.0 to +5.5

TC642 Features

• Temperature Proportional Fan Speed for Acoustic Control and Longer Fan Life
• Efficient PWM Fan Drive
• 3.0V to 5.5V Supply Range:
- Fan Voltage Independent of TC642 Supply Voltage
- Supports any Fan Voltage
• FanSense™ Fault Detection Circuits Protect Against Fan Failure and Aid System Testing
• Shutdown Mode for "Green" Systems
• Supports Low Cost NTC/PTC Thermistors
• Space Saving 8-Pin MSOP Package
• Over-temperature Indication

TC642 Typical Application

• Power Supplies
• Personal Computers
• File Servers
• Telecom Equipment
• UPSs, Power Amps, etc.
• General Purpose Fan Speed Control

TC642 Connection Diagram

TC642COA Parameters

Technical/Catalog Information	TC642COA
Vendor	Microchip Technology
Category	Integrated Circuits (ICs)
Applications	Fan Controller, Brushless (BLDC)
Number of Outputs	1
Voltage - Supply	3 V ~ 5.5 V
Voltage - Load	-
Current - Output	-
Operating Temperature	0°C ~ 70°C
Package / Case	8-SOIC (3.9mm Width)
Packaging	Tube
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	TC642COA TC642COA

TC642VOA Parameters

Technical/Catalog Information	TC642VOA
Vendor	Microchip Technology
Category	Integrated Circuits (ICs)
Applications	Fan Controller, Brushless (BLDC)
Number of Outputs	1
Voltage - Supply	3 V ~ 5.5 V
Voltage - Load	-
Current - Output	-
Operating Temperature	0°C ~ 85°C
Package / Case	8-SOIC (3.9mm Width)
Packaging	Tube
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	TC642VOA TC642VOA

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