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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 TC646EUA 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 FanSense technology for fault detection. The device utilizes pulse width modulation (PWM) for temperature-proportional speed control. It is housed in an 8-MSOP surface-mount package with a wide operating temperature range from -40°C to +85°C. Key electrical specifications include a maximum output current of 5 mA and a typical operating supply current of 500 µA.
Feature Summary
- Integrates FanSense technology for automatic shutdown and fault detection upon fan failure
- Provides efficient PWM drive for temperature-proportional fan speed control
- Supports low-cost NTC or PTC thermistors for system sensing
- Includes a shutdown mode to reduce power consumption in green systems
Applications
- Temperature-controlled cooling for electronic equipment
- Fan speed regulation in industrial automation systems
- Thermal management in consumer electronics
- System protection against fan failure in embedded devices
Procurement Notes
Verify the specific suffix 'EUA' corresponds to the MSOP-8 package and industrial temperature grade (-40°C to +85°C). Confirm RoHS compliance status and moisture sensitivity level requirements during storage and handling. Ensure the ordering part number matches the exact tube packaging configuration provided by the manufacturer.
Selection Notes
Select this component when designing systems requiring integrated fan fault detection and thermal shutdown capabilities. It is suitable for applications needing precise PWM control of brushless DC fans without external complex circuitry. Consider the 8-MSOP package constraints for PCB layout and thermal dissipation requirements relative to the 5 mA output capability.
Part Context
The TC646EUA belongs to the TC646 series of fan controllers from Microchip Technology. This series focuses on providing acoustic control and extended fan life through temperature-proportional speed adjustment. The EUA variant specifically denotes the surface-mount MSOP package option, distinguishing it from through-hole or other package variants within the same functional family.
Replacement Considerations
The TC646BEUA is a parameter-equivalent alternative within the same series. Verify that the replacement matches the required package type and temperature range specifications before integration into existing designs.
