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Details for TC648BEPA by Microchip Technology
TC648B
TC648BEPA
Buy Directly from Microchip Technology Inc (0 in stock) $1.3100
PWM Fan speed Controller
TC648BEPA image

TC648BEPA by Microchip Technology

PWM Fan speed Controller
Features
Temperature Proportional Fan Speed for Acoustic Control and Longer Fan Life
Over-Temperature Indication
Efficient PWM Drive
Automatic Shutdown Mode for "Green" Systems
3.0V to 5.5V Supply Range
Fan Voltage Independent of Supply Voltage u2013 Supports Any Fan Voltage
Supports Low Cost NTC/PTC Thermistors
Description
The TC648B is a new version of the existing TC648 fan speed controller. This device is a switch mode fan speed controller, which incorporates a new fan auto restart function. Temperature 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. The auto-shutdown speed is set by a simple resistor divider on the VAS input. An integrated 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 OTF signal is asserted if the PWM reaches 100% duty cycle, indicating that maximum cooling capability has been reached and a possible thermal runaway condition exists.
Specifications
Device Description:
Fan Manager
Typical Accuracy (°C):
Depends on External Thermistor
Max Accuracy @ 25°C (°C):
Depends on External Thermistor
Temp. Range Max. (°C):
+85
Temp. Range. Min. (°C):
-40
Vcc Range Max. (V):
+5.5
Vcc Range Min. (V):
+3.0
Max. Supply Current (µA):
400
External Temp Input:
True
PWMFreq:
Low
Auto Shutdown:
True
Over Temp Alert:
True
Temperature Range:
-40C to +85C
Alternate Descriptions
MOTOR DRIVER, PWM, 5mA, DIP-8; Motor Type:PWM; No. of Outputs:1Outputs; Output Current:5mA; Output Voltage:4.4V; Driver Case Style:DIP; No. of Pins:8Pins; Supply Voltage Min:3V; Supply Voltage Max:5.5V; Operating Temperature Max:85°CRoHS Compliant: Yes Newark Electronics
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Details for TC648BEPA by Microchip Technology
TC648B
TC648BEPA
Buy Directly from Microchip Technology Inc (0 in stock) $1.3100
IC PWM FAN SPEED CNTRL SD 8-DIP
TC648BEPA image

TC648BEPA by Microchip Technology

IC PWM FAN SPEED CNTRL SD 8-DIP
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
TC648BEPA 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:
DIP
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:
-
SVHC:
No SVHC (15-Jan-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
MOTOR DRIVER, PWM, 5mA, DIP-8; Motor Type:PWM; No. of Outputs:1Outputs; Output Current:5mA; Output Voltage:4.4V; Driver Case Style:DIP; No. of Pins:8Pins; Supply Voltage Min:3V; Supply Voltage Max:5.5V; Operating Temperature Max:85°CRoHS Compliant: Yes Newark Electronics
PWM Fan Motor Speed Controller 8-Pin PDIP Tube Avnet America
Driver; PWM controller; Channels:1; DIP8 Transfer Multisort Elektronik
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