Datasheet Microchip TC670ECHTR The TC670 is an integrated fan speed sensor that predicts and/or detects fan failure, preventing thermal damage to systems with cooling fans Datasheets- Download » Datasheet, PDF, 253 Kb, 02-05-2013
TC670 Datasheet Docket ↓TC670 Tiny Predictive Fan Failure Detector Features General Description 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, 90 ВµA (typ.) VDD Range 3.0V to 5.5V Available in a 6-Pin SOT-23 Package 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 (Pin 1) of the TC670. When the minimum fan speed is reached, the ALERT pin (Pin 5) 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. Applications 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. Protection for Linear-Controlled Fans Power Supplies Industrial Equipment PCs and Notebooks Data Storage ...
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StatusLifecycle Status | Production (Appropriate for new designs but newer alternatives may exist) |
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PackagingParametricsAuto shutdown | No |
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Description | Predictive Fan Fault Detector |
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External Temp Input | No |
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Fan Speed Table | N/A |
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FanSense fan monitor | Yes |
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High/Low PWM Freq | N/A |
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Integrated temp sensor | No |
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Max. Accuracy @ 25° | N/A ° |
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Max. Supply Current | 150 µA |
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Operating Temperature Range | -40 to +85 °C |
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Over temp alert | No |
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Predictive fan fault detection/read/RPM | Yes |
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SMBus compatible interface | No |
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Temp. Range | -40 - +85 ° |
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Typical Accuracy | N/A ° |
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Vcc Range | +3.0 - +5.5 V |
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Eco PlanMoldel LineSeries: TC670 (1) Manufacturer's Classification- Thermal Management > Fan Controllers > Open Loop Fan Controllers and Fault Detectors
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