TC624 - Uncategorized Microchip - Free user manual and instructions
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| Product Type | Temperature Sensor and Fan Speed Controller |
| Manufacturer | Microchip Technology Inc. |
| Model | TC624 |
| Supply Voltage | 2.7 V to 5.5 V |
| Supply Current | Typical 60 µA |
| Temperature Range | -40°C to +125°C |
| Output Type | Open-Drain, Active-Low |
| Fan Control | Automatic fan start and speed control |
| Package | 8-Pin SOIC, 8-Pin DIP |
| Dimensions (SOIC) | 4.9 mm x 3.9 mm |
| Weight | Approximately 0.1 g |
| Operating Temperature | -40°C to +85°C |
| Storage Temperature | -65°C to +150°C |
| Hysteresis | Programmable via external resistor |
| Shutdown Mode | Yes, via SHDN pin |
| Applications | Power supplies, personal computers, servers, audio amplifiers |
| RoHS Compliant | Yes |
| Maintenance | No user-serviceable parts; keep free from dust and moisture |
| Cleaning | Use dry cloth; avoid solvents |
| Safety Precautions | Observe ESD precautions; avoid exceeding absolute maximum ratings |
| Spare Parts | Contact Microchip distributor |
Frequently Asked Questions - TC624 Microchip
What is the operating voltage range of the TC624?
The TC624 operates from 2.7V to 5.5V, making it suitable for both 3.3V and 5V systems.
How does the TC624 control fan speed?
The TC624 uses a temperature sensor to control fan speed. It automatically starts the fan when temperature rises above a set threshold and modulates speed via an open-drain output.
Can the TC624 be used with 3-wire fans?
Yes, the TC624 is designed to control standard 3-wire fans (tachometer output not required). The output is an open-drain signal that can drive a MOSFET or directly connect to a fan's control pin.
What is the temperature accuracy of the TC624?
The TC624 has a typical temperature accuracy of ±3°C over the full range of -40°C to +125°C.
How do I set the hysteresis?
Hysteresis is set by connecting an external resistor between the HYST pin and ground. The value determines the temperature difference between fan on and off.
What is the purpose of the SHDN pin?
The SHDN (shutdown) pin allows you to disable the device. Driving it low puts the TC624 into a low-power shutdown mode with minimal current consumption.
Can the TC624 drive multiple fans?
The TC624's open-drain output can drive multiple fans if the total load current does not exceed the maximum rating (typically 50mA). Use a buffer or MOSFET for higher currents.
What is the typical application circuit?
A typical circuit includes power supply decoupling, a resistor for hysteresis, and a pull-up resistor on the output. Connect the fan control input to the open-drain output.
Is the TC624 RoHS compliant?
Yes, the TC624 is manufactured in compliance with RoHS directives, ensuring it is free from hazardous substances.
Where can I find the datasheet?
The datasheet and user manual are available for free download on the manufacturer's website or through authorized distributors. Manuals are provided in PDF format.
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Product information
Brand : Microchip
Model : TC624
Category : Uncategorized