TC647BEOA

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Details for Microchip Technology

TC647BEOA

PWM Fan speed Controller
Buy Directly from Microchip Technology (3025 in Stock)
$0.8200 per unit
Series Information for TC647BEOA - Microchip Technology

Features

  • feature
    3.0V to 5.5V Supply Range:
  • feature
    Efficient PWM Fan Drive
  • feature
    Fan Voltage Independent of TC642B/TC647B Supply Voltage
  • feature
    FanSenseu2122 Fault Detection Circuit Protects Against Fan Failure and Aids System Testing
  • feature
    Over-Temp
  • feature
    Shutdown Mode for "Green" Systems
  • feature
    Supports Low Cost NTC/PTC Thermistors
  • feature
    Supports any Fan Voltage

Description

IC PWM FAN SPEED CNTRL 8-SOIC
The TC642B/TC647B devices are new versions of the existing TC642/TC647 fan speed controllers. These devices are switch mode, fan speed controllers that incorporate a new fan auto-restart function. Tempera- ture-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 1.20V to 2.60V (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 motor start-up at turn-on, coming out of shutdown mode or following a transient fault. A logic-low applied to VMIN (pin 3) causes fan shutdown. The TC642B and TC647B also feature 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/ TC647B device to turn the VOUT output on full (100% duty cycle). If the 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 attempt to restart the fan. FAULT is also asserted if the PWM reaches 100% duty cycle (TC642B only), indicat- ing that maximum cooling capability has been reached and a possible overheating condition exists. The TC642B and TC647B devices are available in 8-pin plastic MSOP, SOIC and PDIP packages. The specified temperature range of these devices is -40 to +85ºC. MSOP, PDIP, SOIC

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:
647
Frequency:
30Hz
Input Current:
200µA
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

Future Electronics

TC647 Series 5.5 V PWM Fan Speed Controller w/ Fault Detection - SOIC-8