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Details for TC654EUN by Microchip Technology
TC654
TC654EUN
Buy Directly from Microchip Technology Inc (2395 in stock) $2.0000
Dual, SMBusTM PWM Fan Speed Controller With Fan Fault Detection
TC654EUN image

TC654EUN by Microchip Technology

Dual, SMBusTM PWM Fan Speed Controller With Fan Fault Detection
Features
Temperature Proportional Fan Speed for Acoustic Control and Longer Fan Life
FanSenseu2122 Protects Against Fan Failure
Provides RPM Data
2-wire SMBus Compatible Interface
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 TC654 is a dual PWM mode fan speed controller with FanSense™ TM technology for use with brush-less DC motors. The device allows temperature proportional speed control and therefore accomplishes lower acoustic fan noise and longer fan life. The TC654 reads the voltage provided by an external ther-mistor (or voltage output temperature sensor) and adjusts a 30% to 100% PWM duty cycle output to the fan with respect to the input temperature voltage. The PWM duty cycle can also be programmed via SMBus to allow fan speed control without the need of an external thermistor.

In normal fan operation, pulse trains are present at the SENSE pin. These pulses are used to calculate the fan RPM. The fan RPM data is used to detect a worn out, stalled, open or unconnected fan. An RPM level below the user-programmable threshold causes the TC654 to assert a logic low alert signal (FAULT). Thedefault value is 500RPM. The TC654 consumes only 0.3mA during operation and can also enter a low-power shutdown mode by setting the appropriate bit in the configuration register.

Specifications
Device Description:
Programmable Dual 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):
320
External Temp Input:
True
SM Bus:
True
PWMFreq:
Low
Fan Sense:
True
Predictive Fan Fault:
True
Temperature Range:
-40C to +85C
Alternate Descriptions
Dual- SMBusTM PWM Fan Speed Onlinecomponents.com
PWM Fan Speed Controller Dual SMBus MSOP RS Components
MOTOR DRIVER, PWM, 5mA, MSOP-10; Motor Type:PWM; No. of Outputs:1Outputs; Output Current:5mA; Output Voltage:4.4V; Driver Case Style:MSOP; No. of Pins:10Pins; Supply Voltage Min:3V; Supply Voltage Max:5.5V; Product Range:- RoHS Compliant: Yes Newark Electronics
Soft Sw PWM Cntrlr 1-OUT HS 10-Pin MSOP Tube Avnet America
Dual SMBusTM PWM Fan Speed Controller With Fan Fault Detection Microchip Technology Inc
PWM Fan Speed Controller Dual SMBus MSOP Allied Electronics & Automation
TC654 Series 5.5 V PWM Fan Speed Controller w/ Fault Detection - MSOP-10 Future Electronics
Similar Part
Details for TC654EUN by Microchip Technology
TC654
TC654EUN
Buy Directly from Microchip Technology Inc (2395 in stock) $2.0000
IC PWM FAN SPEED CNTRL 10-MSOP
TC654EUN image

TC654EUN by Microchip Technology

IC PWM FAN SPEED CNTRL 10-MSOP
Features
2-Wire SMBusu2122-Compatible Interface
Efficient PWM Fan Drive
FanSenseu2122 Protects against Fan Failure and Eliminates the Need for 3-wire Fans
Overtemperature Detection (TC655)
Provides RPM Data
Software Controlled Shutdown Mode for "Green" Systems
Supports Any Fan Voltage
Supports Low-Cost NTC/PTC T
Part Information
TC654EUN image
RoHS Compliant
Description
The TC654 and TC655 are PWM mode fan speed con- trollers with FanSense technology for use with brush- less DC fans. These devices implement temperature proportional fan speed control which lowers acoustic fan noise and increases fan life. The voltage at VIN (Pin 1) represents temperature and is typically pro- vided by an external thermistor or voltage output tem- perature sensor. The PWM output (VOUT) is adjusted between 30% and 100%, based on the voltage at VIN. The PWM duty cycle can also be programmed via SMBus to allow fan speed control without the need for an external thermistor. If VIN is not connected, the TC654/TC655 will start driving the fan at a default duty cycle of 39.33%. See Section 4.3 “Fan Start-up” for more details. In normal fan operation, pulse trains are present at SENSE1 (Pin 8) and SENSE2 (Pin 7). The TC654/ TC655 use these pulses to calculate the fan revolu- tions per minute (RPM). The fan RPM data is used to detect a worn out, stalled, open or unconnected fan. An RPM level below the user-programmable threshold causes the TC654/TC655 to assert a logic low alert signal (FAULT). The default threshold value is 500 RPM. Also, if this condition occurs, F1F (bit 0<0>) or F2F (bit 1<0>) in the Status Register will also be set to a ‘1’. An over-temperature condition is indicated when the voltage at VIN exceeds 2.6V (typical). The TC654/ TC655 devices indicate this by setting OTF(bit 5) in the Status Register to a '1'. The TC655 device also pulls the FAULT line low during an over-temperature condition. The TC654/TC655 devices are available in a 10-Pin MSOP package and consume 150 µA during opera- tion. The devices can also enter a low-power Shutdown mode (5 µA, typ.) by setting the appropriate bit in the Configuration Register. The operating temperature range for these devices is -40°C to +85ºC. 10-Pin MSOP
Specifications
Motor Type:
PWM
No. of Outputs:
1Outputs
Output Current:
5mA
Output Voltage:
4.4V
Driver Case Style:
MSOP
No. of Pins:
10Pins
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:
654
Frequency:
30Hz
Input Current:
150µA
Operating Temperature Range:
-40°C to +85°C
Supply Voltage Range:
3V to 5.5V
Alternate Descriptions
Dual- SMBusTM PWM Fan Speed Onlinecomponents.com
PWM Fan Speed Controller Dual SMBus MSOP RS Components
MOTOR DRIVER, PWM, 5mA, MSOP-10; Motor Type:PWM; No. of Outputs:1Outputs; Output Current:5mA; Output Voltage:4.4V; Driver Case Style:MSOP; No. of Pins:10Pins; Supply Voltage Min:3V; Supply Voltage Max:5.5V; Product Range:- RoHS Compliant: Yes Newark Electronics
Soft Sw PWM Cntrlr 1-OUT HS 10-Pin MSOP Tube Avnet America
Dual SMBusTM PWM Fan Speed Controller With Fan Fault Detection Microchip Technology Inc
PWM Fan Speed Controller Dual SMBus MSOP Allied Electronics & Automation
TC654 Series 5.5 V PWM Fan Speed Controller w/ Fault Detection - MSOP-10 Future Electronics