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TC670

Status: In Production

Features:

  • Fan Wear-out Detection for 2-Wire Linear Controlled Fans
  • Replacement System for 3-Wire Fans
  • Fan Alert Signal when Fan Speed is below Programmed Threshold
  • CLEAR Capability for Eliminating False Alarm
  • Low Operating Current, 90uA (typ)
  • VDD Range 3.0V to 5.5V
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Overview
Documents
Development Environment
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RoHS Information
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Device Overview

Summary

The TC670 is an integrated fan speed sensor that predicts and/or detects fan failure, preventing thermal damage to systems with cooling fans. When the fan speed falls below a user specified level, the TC670 asserts an ALERT signal. With this design, a critical minimum fan speed is determined by the user. The fan alert level is then set with a resistor divider on the THRESHOLD pin of the TC670. When the minimum fan speed is reached, the ALERT pin changes from a digital HIGH to LOW. This failure detection works with all linear controlled 2-wire fans. The TC670 eliminates the need for 3-wire fan solutions.
A CLEAR option can be used to reset the ALERT signal, allowing the flexibility of connecting the ALERT output of the TC670 with other Alert/Fault interrupts in the system. This feature can be implemented so that false fan fault conditions do not initiate system shutdown. The TC670 is specified to operate over the full industrial temperature range of -40°C to 85°C. The TC670 is offered in a SOT23-6 pin package and consumes 90uA (typ) during operation. The space saving package and low power consumption make this device an ideal choice for systems requiring fan speed monitoring. The TC670 is an integrated fan speed sensor that predicts and/or detects fan failure, preventing thermal damage to systems with cooling fans. When the fan speed falls below a user specified level, the TC670 asserts an ALERT signal. The TC670 is a predictive fan failure detector that asserts a signal whenever the fan's RPM falls below a user-programmable RPM level.

Additional Features
    • Fan Wear-out Detection for 2-Wire Linear Controlled Fans
    • Replacement System for 3-Wire Fans
    • Fan Alert Signal when Fan Speed is below Programmed Threshold
    • CLEAR Capability for Eliminating False Alarm
    • Low Operating Current, 90uA (typ)
    • VDD Range 3.0V to 5.5V
Parametrics
Name
Value
Device Description
Predictive Fan Fault Detector
Typical Accuracy (°C)
N/A
Predictive Fan Fault
yes
Max. Supply Current (µA)
150
Max. Accuracy @ 25°C (°C)
N/A
Fan Sense
Yes
High/Low PWM Freq
N/A
Fan Speed Table
N/A
Temp Range (°C)
-40 to +85
Vcc Range (V)
+3.0 to +5.5

Documents

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Data Sheet

02/05/2013
246KB

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Product Line Documents


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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
TC670ECHTR
0.017000
0.046667
6
SOT-23
-
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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