TC654EUN

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Details for Microchip Technology

TC654EUN

Dual SMBusTM PWM Fan Speed Controller With Fan Fault Detection
Buy Directly from Microchip Technology (9195 in Stock)
$1.4700 per unit
Series Information for TC654EUN - Microchip Technology

Features

  • feature
    2-Wire SMBusu2122-Compatible Interface
  • feature
    Efficient PWM Fan Drive
  • feature
    FanSenseu2122 Protects against Fan Failure and Eliminates the Need for 3-wire Fans
  • feature
    Overtemperature Detection (TC655)
  • feature
    Provides RPM Data
  • feature
    Software Controlled Shutdown Mode for "Green" Systems
  • feature
    Supports Any Fan Voltage
  • feature
    Supports Low-Cost NTC/PTC T

Description

IC PWM FAN SPEED CNTRL 10-MSOP
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

Avnet America

Soft Sw PWM Cntrlr 1-OUT HS 10-Pin MSOP Tube

Avnet America product

Microchip Technology Inc

Dual SMBusTM PWM Fan Speed Controller With Fan Fault Detection

Avnet Asia

Soft Sw PWM Cntrlr 1-OUT HS 10-Pin MSOP Tube

Avnet Asia product

Future Electronics

TC654 Series 5.5 V PWM Fan Speed Controller w/ Fault Detection - MSOP-10