TC646EOA

Overview

The TC646EOA is a fan controller from the FanSense series, designed for brushless DC motor applications. It operates within a supply voltage range of 3 V to 5.5 V and draws a typical operating current of 500 µA. The device features a low-side pre-driver output capable of sourcing 5 mA. It supports PWM control methods and functions effectively across an extended temperature range from -40°C to +85°C. Housed in an 8-SOIC surface-mount package, it integrates system shutdown and fault detection capabilities.

Feature Summary

• Integrates system shutdown and fault detection mechanisms for enhanced operational safety
• Supports PWM control methods for precise fan speed regulation
• Features low-side pre-driver output configuration for external transistor driving

Applications

• Fan controllers
• Brushless DC (BLDC) motor control systems

Procurement Notes

Verify component status carefully as this part is designated as End-of-Life with discontinuation scheduled for May 29, 2026. Confirm that the SOIC-8 package and electrical specifications align with existing design requirements before finalizing procurement plans due to limited future availability.

Selection Notes

Select this component for designs requiring integrated fault detection and shutdown features in BLDC applications. Ensure compatibility with the 3 V to 5.5 V supply range and verify that the 5 mA output current meets load requirements. Consider alternative active parts if long-term supply stability is critical for the product lifecycle.

Part Context

This component belongs to the TC646 family of fan controllers manufactured by Microchip Technology. It is categorized under PMIC and Motor/Motion/Ignition Controllers. The device utilizes parallel interface communication and is housed in an 8-SOIC package with a width of 3.90 mm.

Replacement Considerations

TC646VOA713 is listed as a substitute part number.