TC646BEUA713

Overview

The TC646BEUA713 is a PWM fan speed controller from Microchip Technology, designed for brushless DC fans. It operates within a supply voltage range of 3V to 5.5V and supports fans with voltages independent of the IC supply. The device features FanSense technology for fault detection and includes an auto-shutdown function for system protection. It utilizes temperature-proportional speed control via PWM to manage acoustic noise and extend fan life. The component is housed in an 8-pin MSOP package and is supplied in tape and reel format.

Feature Summary

• Temperature-proportional fan speed control using pulse width modulation (PWM) for acoustic optimization
• FanSense fault detection circuits to identify fan failure and assist in system testing
• Auto-shutdown capability to protect systems during over-temperature conditions
• Supports low-cost NTC/PTC thermistors for temperature sensing

Applications

• Brushless DC fan speed control in computer cooling systems
• Thermal management in electronic enclosures requiring acoustic optimization
• System protection circuits involving fan failure detection

Procurement Notes

Verify the specific suffix '713' confirms the tape and reel packaging variant distinct from tube-packaged equivalents like TC646BEUA. Confirm RoHS compliance status and ensure the 8-pin MSOP footprint matches the target PCB design. Cross-reference the manufacturer's latest datasheet for any pinout or electrical characteristic updates prior to finalizing procurement specifications.

Selection Notes

Select this component when integrated PWM control and automatic shutdown are required for brushless DC fans. It is suitable for designs needing independent fan voltage support relative to the logic supply. Consider the 8-pin MSOP package for space-constrained applications. Ensure compatibility with external NTC/PTC thermistors for the temperature sensing interface.

Part Context

This part belongs to the TC646B series of fan controllers. It shares core functionality with variants such as TC646EUA and TC646VOA but differs in package type and shipping configuration. The BEUA designation specifically indicates the MSOP package and standard tube/reel availability depending on the suffix.

Replacement Considerations

Direct substitutes include other TC646 family members like TC646EUA or TC646VOA, provided the package and thermal requirements align. Verify that alternative packages maintain the same pinout compatibility for direct board replacement.