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Details for TC649BEUA by Microchip Technology
Electronic & Electrical Components > Semiconductors - ICs > Driver & Interface ICs
TC649BEUA
Buy Directly from Microchip Technology Inc (2100 in stock) $1.2400
PWM FAN SPEED CNTRL SD 8-MSOP
TC649BEUA image

TC649BEUA by Microchip Technology

PWM FAN SPEED CNTRL SD 8-MSOP
Features
3.0V to 5.5V Supply Range:
Automatic Shutdown Mode for u201cGreenu201d Systems
Efficient PWM Fan Drive
Fan Voltage Independent of TC646B/ TC648B/TC649B Supply Voltage
FanSenseu2122 Fault Detection Circuit Protects Against Fan Failure and Aids System Testing (TC646B/TC649B)
Over-Temper
Supports Low Cost NTC/PTC Thermistors
Supports any Fan Voltage
Part Information
TC649BEUA image
RoHS Compliant
Description
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:
MSOP
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:
649
Frequency:
30Hz
Input Current:
200µA
Operating Temperature Range:
-40°C to +85°C
Supply Voltage Range:
3V to 5.5V
Alternate Descriptions
MSOP PWM FAN SPEED CONTROLLER WITH FAN RESTART, AUTO-SHUTDOWN AND FAULT DETECTION ROHS COMPLIANT: YES Newark Electronics
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PWM Fan speed Controller Microchip Technology Inc
PWM BLDC Fan Speed Controller,MSOP8 Allied Electronics & Automation
TC649 Series 5.5 V PWM Fan Speed Controller w/ Fault Detection - MSOP-8 Future Electronics