Microchip TC642BEUA
Manufacturer No:
TC642BEUA
Manufacturer:
Microchip
Package:
8-TSSOP, 8-MSOP (0.118, 3.00mm Width)
Description:
TC642B PWM fan speed controller with temperature proportional control, thermistor input, fault detection, auto restart
Quantity:
In Stock :6481
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Expected Shipping：Mon, Jun 15 - Tue, Jun 16, 2026
Lead Time：Inquire about availability
Date Code：Within 2 Years
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TC642BEUA Information
Microchip TC642BEUA technical specifications, attributes, parameters and parts with similar specifications to Microchip TC642BEUA.
- 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)
- 400
- 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 TC642BEUA.
Data Sheets:
Application Notes:
The TC642B is a new version of the existing TC642 fan speed controller. This device is a switch mode fan speed controller, which incorporates a new fan auto restart function. Temperature proportional speed control is accomplished using pulse width modulation. A thermistor (or other voltage output temperature sensor) connected to the VIN input supplies the required control voltage of 1.2V to 2.6V (typical) for 0% to 100% PWM duty cycle. Minimum fan speed is set by a simple resistor divider on the VMIN input. An integrated Start-Up Timer ensures reliable fan motor start-up at turn-on, coming out of shutdown mode, or following a transient fault. A logic low applied to VIN, pin 1, causes fan shutdown.
The TC642B also features Microchip Technology's proprietary FanSense™ technology for increasing system reliability. In normal fan operation, a pulse train is present at SENSE, pin 5. A missing-pulse detector monitors this pin during fan operation. A stalled, open, or unconnected fan causes the TC642B device to turn the VOUT output on full (100% duty cycle). If the fan fault persists (a fan current pulse is not detected within a 32/F period), the FAULT output goes low. Even with the FAULT output low, the VOUT output is on full during the fan fault condition in order to try and restart the fan. The FAULT signal is also asserted if the PWM reaches 100% duty cycle, indicating that maximum cooling capability has been reached and a possible thermal runaway condition exists.
- Temperature Proportional Fan Speed for Acoustic Control and Longer Fan Life
- FanSense™ Protects Against Fan Failure
- Efficient PWM Drive
- Shutdown Mode for "Green" Systems
- 3.0V to 5.5V Supply Range
- Fan Voltage Independent of Supply Voltage – Supports Any Fan Voltage
- Supports Low Cost NTC/PTC Thermistors
- Fan Auto-Restart
- Over-Temperature Indication
AIChipLink – Your Trusted Electronic Components Distributor
12.28 M
Listed Part Number
3,000+
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4.9 M
In-stock SKU
15,000+
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