TC646EOA

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Details for Microchip Technology

TC646EOA

PWM FAN SPEED CONTROLLER WITH FANSENSE
Buy Directly from Microchip Technology (3595 in Stock)
$1.1100 per unit
Series Information for TC646EOA - Microchip Technology

Features

  • feature
    3.0V to 5.5V Supply Range:
  • feature
    Efficient PWM Fan Drive
  • feature
    Fan Voltage Independent of TC646 Supply Voltage
  • feature
    FanSenseu2122 Fault Detection Circuits Protect Against Fan Failure and Aid System Testing
  • feature
    Shutdown Mode for "Green" Systems
  • feature
    Supports Low Cost NTC/PT
  • feature
    Supports any Fan Voltage

Description

IC PWM FAN SPEED CNTRL 8-SOIC
The TC646 is a switch mode, fan speed controller for use with brushless DC fans. Temperature proportional speed control is accomplished using pulse width mod- ulation (PWM). A thermistor (or other voltage output temperature sensor) connected to the VIN input fur- nishes 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, auto-shutdown mode or following a transient fault. The TC646 features Microchip Technology's propri- etary 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 TC646 to trigger its Start-up Timer once. If the fault persists, the FAULT output goes low and the device is latched in its shut- down 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 Section 5.0, “Typical Applications”, for more information and system design guidelines. The TC646 is available in the 8-pin plastic DIP, SOIC and MSOP packages and is available in the industrial and extended commercial temperature ranges. 1 8 2 7 3 6 4 5 TC646 GND CF VIN VAS FAULT SENSE VDD

Specifications

Motor Type:
PWM
No. of Outputs:
1Outputs
Output Current:
5mA
Output Voltage:
4.4V
Driver Case Style:
SOIC
No. of Pins:
8Pins
Supply Voltage Min:
3V
Supply Voltage Max:
5.5V
Operating Temperature Min:
-40°C
Operating Temperature Max:
85°C
Product Range:
-
Automotive Qualification Standard:
-
RoHS Phthalates Compliant:
Yes
MSL:
MSL 1 - Unlimited
SVHC:
No SVHC (15-Jan-2018)
Base Number:
646
Frequency:
30Hz
Input Current:
500µA
Operating Temperature Range:
-40°C to +85°C
Supply Voltage Range:
3V to 5.5V

Alternate Descriptions

Avnet America

PWM Fan Motor Speed Controller 8-Pin SOIC N Tube

Avnet America product

Microchip Technology Inc

PWM FAN SPEED CONTROLLER WITH FANSENSE