TC646EUA713

Overview

The TC646EUA713 is a switch-mode fan speed controller designed for brushless DC fans, manufactured by Microchip Technology. It operates within a supply voltage range of 3V to 5.5V and features PWM control for temperature-proportional fan speed regulation. The device incorporates FanSense technology for fault detection and supports system shutdown modes. It is housed in an 8-MSOP surface-mount package with a maximum operating temperature of 85°C and a minimum of -40°C. The unit draws a typical quiescent current of 500µA and provides a single output capable of sourcing 5mA.

Feature Summary

• Implements pulse width modulation for efficient, temperature-proportional fan speed control to reduce acoustic noise and extend fan lifespan.
• Integrates FanSense fault detection circuits to monitor fan operation, protecting against failure and aiding system diagnostics.
• Includes a dedicated shutdown mode feature to support energy-efficient 'green' system designs when cooling is not required.

Applications

• Temperature-controlled cooling systems for electronic equipment
• Brushless DC fan speed regulation in consumer electronics
• Fault detection and monitoring in server or industrial ventilation units

Procurement Notes

Verify the specific suffix '713' confirms the tape-and-reel packaging variant distinct from tube-packaged equivalents like TC646EUA. Confirm RoHS compliance status and moisture sensitivity level requirements prior to assembly. Ensure the ordering quantity aligns with the reel specifications provided by the manufacturer to avoid inventory discrepancies.

Selection Notes

Select this component for applications requiring precise thermal management of brushless DC fans without complex microcontroller intervention. The integrated FanSense capability simplifies design by providing direct fault indication. Consider the 8-MSOP package constraints for PCB layout and ensure the input thermistor interface matches the sensor type available for the target application environment.

Part Context

This part belongs to the TC646 series of fan controllers, which are specialized PMICs for motor and motion control. It shares core functional architecture with variants such as TC646EUA and TC646VOA, differing primarily in packaging format and shipping configuration. The series is categorized under Motor / Motion / Ignition Controllers & Drivers within Microchip's power management portfolio.

Replacement Considerations

TC646EUA serves as a parameter-equivalent alternative with identical electrical characteristics but utilizes tube packaging instead of tape-and-reel. TC646BEUA offers similar functionality in the same MSOP package family. Verify pinout compatibility and packaging differences before substituting to ensure mechanical fit on existing PCB layouts.