TC646VPA

Overview

The TC646VPA is a fan controller from the FanSense series by Microchip Technology, designed for brushless DC (BLDC) motor applications. It operates within a supply voltage range of 3 V to 5.5 V and functions across an ambient temperature range of 0°C to +85°C. The device features a low quiescent current of 500 µA and provides a maximum output drive current of 5 mA. It utilizes a parallel interface for control signals and employs a low-side pre-driver output configuration. The component is housed in an 8-pin PDIP package with a standard through-hole mounting style.

Feature Summary

• Integrated speed control functionality specifically optimized for brushless DC fans
• Built-in shutdown and fault detection capabilities for system protection
• Low power consumption design suitable for energy-efficient cooling solutions

Applications

• Computer cooling systems
• Server and storage enclosure thermal management
• Industrial equipment ventilation control

Procurement Notes

Verify the specific package variant against project requirements, as the TC646 family includes surface-mount options like TC646VOA and TC646VUA alongside this through-hole DIP version. Confirm that the 5 mA output current meets the load requirements of the target fan. Ensure compatibility with the 3 V to 5.5 V supply rails available in the design. Check for RoHS compliance status if environmental regulations apply to the final assembly.

Selection Notes

Select the TC646VPA when a through-hole DIP-8 package is required for prototyping or specific board layouts. Compare against TC642VPA if fault detection alone is sufficient without additional shutdown logic. Consider TC646EUA or TC646VUA for designs requiring surface-mount technology. Evaluate the 500 µA quiescent current against stricter low-power alternatives if battery operation is critical.

Part Context

This component belongs to the TC646 series of fan controllers, which are part of Microchip's broader portfolio of power management integrated circuits. The series focuses on providing reliable speed control and monitoring for cooling fans in electronic systems. The TC646VPA represents the through-hole packaging option within this functional group, sharing core electrical characteristics with its surface-mount counterparts.

Replacement Considerations

TC642VPA serves as a parameter-equivalent alternative offering similar control features. TC647VPA and TC649VPA are also listed as potential substitutes within the same product family.