| TYPE | DESCRIPTION |
|---|
| Mounting Style | Surface Mount |
| Frequency | 30.0 Hz |
| Number of Pins | 8 Pin |
| Supply Voltage (DC) | 3.00V (min) |
| Case/Package | SOIC-8 |
| Number of Outputs | 1 Output |
| Input Voltage (DC) | 5.50 V |
| Output Voltage | 4.4 V |
| Output Current | 5 mA |
| Supply Current | 400 µA |
| Number of Channels | 1 Channel |
| Number of Positions | 8 Position |
| Thermal Resistance | 200 ℃/W |
| Operating Temperature (Max) | 85 ℃ |
| Operating Temperature (Min) | -40 ℃ |
| Supply Voltage | 3V ~ 5.5V |
| Supply Voltage (Max) | 5.5 V |
| Supply Voltage (Min) | 3 V |
| Input Voltage | 5.8 V |
| TYPE | DESCRIPTION |
|---|
| Product Lifecycle Status | Active |
| Packaging | Tube |
| Size-Length | 5 mm |
| Size-Width | 3.99 mm |
| Size-Height | 1.55 mm |
| Operating Temperature | -40℃ ~ 85℃ |
The TC646BEOA is a switch-mode PWM Fan Speed Controller with an auto-shutdown for use with brushless DC fans. Temperature proportional speed control is accomplished using pulse width modulation. A thermistor connected to the VIN input furnishes the required control voltage of 1.25 to 2.65V for 0 to 100% PWM duty cycle. It automatically suspends fan operation when measured temperature is below user programmed minimum setting. An integrated start-up timer ensures reliable motor start-up at turn-ON, coming out of shutdown mode, auto-shutdown mode or following a transient fault. It features Microchip Technology"s proprietary FanSense™ technology for increasing system reliability. In normal fan operation, a pulse train is present at SENSE. A missing-pulse detector monitors this pin during fan operation. A stalled, open or unconnected fan causes the TC646 to trigger its start-up timer once. If the fault persists, the FAULT output goes low and the device is latched in its shutdown mode.
● Temperature proportional fan speed for acoustic control and longer fan life
● Efficient PWM fan drive
● FanSense™ Fault detection circuit protects against fan failure and aids system testing
● Shutdown mode for green systems
● Supports NTC/PTC thermistors
● Over-temperature indication
Microchip
36 Pages / 0.68 MByte
Microchip
76 Pages / 4.71 MByte
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4 Pages / 0.19 MByte
Microchip
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Microchip
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
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