Microchip TC646EOA
Manufacturer No:
TC646EOA
Manufacturer:
Microchip
Package:
8-SOIC (0.154, 3.90mm Width)
Description:
TC646 PWM fan speed controller with temperature proportional speed control, thermistor input, low voltage suspend, fault detection
Quantity:
In Stock :3658
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Shipped from：HK Warehouse
Expected Shipping：Sat, May 30 - Sun, May 31, 2026
Lead Time：Inquire about availability
Date Code：Within 2 Years
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TC646EOA Information
Microchip TC646EOA technical specifications, attributes, parameters and parts with similar specifications to Microchip TC646EOA.
- Type
- Parameter
- Device Description
- Fan Manager
- Typical Accuracy (°C)
- Depends on external thermistor
- Over Temp Alert
- Yes
- SM Bus
- No
- Predictive Fan Fault
- No
- Max. Supply Current (µA)
- 1000
- Max Accuracy @ 25°C (°C)
- Depends on external thermistor
- Integrated temp Sensor
- No
- Fan Sense
- Yes
- External Temp Input
- Yes
- Type
- Parameter
- Auto Shutdown
- Yes
- PWMFreq
- Low
- FanSpeedTable
- No
- Temp. Range Max. (°C)
- +85
- Temp. Range. Min. (°C)
- -40
- Vcc Range Max. (V)
- +5.5
- Vcc Range Min. (V)
- +3.0
Download datasheets and manufacturer documentation for Microchip TC646EOA.
Data Sheets:
Application Notes:
The TC646 is a switch mode fan speed controller for use with brushless DC motors. Temperature proportional speed control is accomplished using pulse width modulation(PWM). A thermistor (or other voltage output temperature sensor)connected to the VIN input furnishes the required control voltage of 1.25V to 2.65V(typical) for 0% to 100% PWM duty cycle. The TC646 automatically suspends fan operation when measured temperature (VIN) is below a user-programmed minimum setting (VAS). An integrated Start-Up Timer ensures reliable motor start-up at turn-on, coming out of Shutdown mode, or following a transient fault. In normal fan operation, a pulse train is present at SENSE, pin 5. The TC646 also features Microchip Technology's proprietary FanSense™ TM technology for increasing system reliability. A missing-pulse detector monitors this pin during fan operation. A stalled, open, or unconnected fan causes the TC646 to trigger its startup timer once. If the fault persists, the FAULT output goes low, and the device is latched in its Shutdown Mode. FAULT is also asserted if the PWM reaches 100% duty cycle, indicating a possible thermal runaway situation, although the fan continues to run. See the Applications section for more information and system design guidelines. The TC646 is packaged in a space-saving 8-pin plastic DIP, MSOP or SOIC package and is available in the industrial temperature range.
- Temperature Proportional
- Fan Speed for Acoustic Control and Longer Fan Life
- Efficient PWM Fan Drive
- 3.0V to 5.5V Supply Range
- Supports Any Fan Voltage!
- FanSense™ TM Fault Detection Circuits Protect Against Fan Failure and Aid
- System Testing
- Automatic Shutdown Mode for "Green" Systems
- Supports Low Cost NTC/PTC Thermistors
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12.28 M
Listed Part Number
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