TC648BEOA

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Details for Microchip Technology

TC648BEOA

PWM Fan speed Controller
Buy Directly from Microchip Technology (5175 in Stock)
$0.8000 per unit
Series Information for TC648BEOA - Microchip Technology

Features

  • feature
    3.0V to 5.5V Supply Range:
  • feature
    Automatic Shutdown Mode for u201cGreenu201d Systems
  • feature
    Efficient PWM Fan Drive
  • feature
    Fan Voltage Independent of TC646B/ TC648B/TC649B Supply Voltage
  • feature
    FanSenseu2122 Fault Detection Circuit Protects Against Fan Failure and Aids System Testing (TC646B/TC649B)
  • feature
    Over-Temper
  • feature
    Supports Low Cost NTC/PTC Thermistors
  • feature
    Supports any Fan Voltage

Description

PWM FAN SPEED CNTRL SD 8-SOIC
The TC646B/TC648B/TC649B devices are new ver- sions of the existing TC646/TC648/TC649 fan speed controllers. These devices are switch-mode fan speed controllers that incorporate a new fan auto-restart func- tion. Temperature-proportional speed control is accom- plished 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. The auto-shutdown threshold/temperature is set by a simple resistor divider on the VAS input. An inte- grated Start-Up Timer ensures reliable fan motor start- up at turn-on, coming out of shutdown mode, auto- shutdown mode or following a transient fault. A logic low applied to VIN (pin 1) causes fan shutdown. The TC646B and TC649B 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 TC646B/ TC649B 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 attempt to restart the fan. FAULT (TC646B) or OTF (TC648B) is also asserted if the PWM reaches 100% duty cycle, indicating that maximum cooling capability has been reached and a possible overheating condition exists. The TC646B, TC648B and TC649B devices are avail- able 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 (27-Jun-2018)
Base Number:
648
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

Conrad

Integrated circuits from leading manufacturers. Please read our extensive documentation which is free to download.

Conrad product

Future Electronics

TC648 Series 5.5 V PWM Fan Speed Controller w/ Fault Detection - SOIC-8