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Product Detailed Parameters
- Description：IC MOTOR DRIVER 3V-5.5V 8MSOP
- Series：FanSense™
- Mfr：Microchip Technology
- Package：Tube
- Motor Type - Stepper：-
- Motor Type - AC, DC：Brushless DC (BLDC)
- Function：Controller - Speed
- Output Configuration：Pre-Driver - Low Side
- Interface：Parallel
- Technology：-
- Step Resolution：-
- Applications：Fan Controller
- Current - Output：-
- Voltage - Supply：3V ~ 5.5V
- Voltage - Load：-
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Supplier Device Package：8-MSOP
- Grade：-
- Qualification：-
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Overview
The TC646BEUA is a switch-mode fan speed controller designed for brushless DC fans, manufactured by Microchip Technology. It operates within a supply voltage range of 3 V to 5.5 V and draws a typical quiescent current of 200 µA. The device supports an output drive current of 5 mA and functions across an operating temperature range of -40°C to +85°C. Housed in an 8-pin MSOP package, it utilizes PWM technology for temperature-proportional speed control.
Feature Summary
- Integrates FanSense™ fault detection circuits to protect against fan failure and assist system testing.
- Provides efficient pulse width modulation (PWM) drive for acoustic control and extended fan life.
- Includes a shutdown mode feature to support energy-efficient 'green' system designs.
Applications
- Temperature proportional fan speed control for electronic equipment
- Brushless DC motor driver applications
- System thermal management with fault detection
Procurement Notes
Verify the component status as End-of-Life or Obsolete through official Microchip channels before finalizing procurement plans. Confirm that the MSOP-8 package and specific suffix align with existing design constraints. Ensure compliance with RoHS directives and check for any pending Product Change Notices affecting availability or specifications.
Selection Notes
Select this component when designing systems requiring integrated fault detection alongside PWM speed control for single brushless DC fans. Consider the low quiescent current for power-sensitive applications. Verify compatibility with NTC/PTC thermistors for the temperature sensing input and ensure the 8-pin MSOP footprint fits the target PCB layout.
Part Context
This part belongs to the TC646B series of fan controllers from Microchip Technology. It shares functional similarities with other variants such as the TC646EPA and TC646EOA, differing primarily in packaging options like PDIP or SOIC versus the surface-mount MSOP configuration used here.
Replacement Considerations
Official substitutes include TC646BEUA713 (tape and reel packaging) and TC646BEUATR. Cross-referencing with the broader TC646 family may identify compatible alternatives depending on package requirements.
