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ADT7476A

Features: ·Monitors up to five voltages·Improved TACH and PWM performance·Controls and monitors up to four fans·High and low frequency fan drive signal·One on-chip and two remote temperature sensors·Extended temperature measurement range up to 191°C·Automatic fan speed control mode controls system...

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SeekIC No. : 004277783 Detail

ADT7476A: Features: ·Monitors up to five voltages·Improved TACH and PWM performance·Controls and monitors up to four fans·High and low frequency fan drive signal·One on-chip and two remote temperature sensors...

ADT7476A Data Sheet

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Part Number:
ADT7476A
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

·Monitors up to five voltages
·Improved TACH and PWM performance
·Controls and monitors up to four fans
·High and low frequency fan drive signal
·One on-chip and two remote temperature sensors
·Extended temperature measurement range up to 191°C
·Automatic fan speed control mode controls system cooling based on measured temperature
·Enhanced acoustic mode dramatically reduces user perception of changing fan speeds
·Thermal protection feature via THERM output
·Monitors performance impact of Intel® Pentium® 4 processor
·Thermal control circuit via THERM input
·3-wire and 4-wire fan speed measurement
·Limit comparison of all monitored values
·5 V support on all TACH and PWM channels
·Meets SMBus 2.0 electrical specifications


Application

Connection Diagram


Specifications

Parameter Rating
Positive Supply Voltage (VCC) 3.6 V
Maximum Voltage on +12 VIN Pin 16 V
Maximum Voltage on +5 VIN Pin 6.25 V
Maximum Voltage on All Open-Drain Outputs 3.6 V
Max Voltage on TACH/PWM Pins +5.5 V
Voltage on Remaining Input or Output Pins −0.3 V to +4.2 V
Input Current at Any Pin ±5 mA
Package Input Current ±20 mA
Maximum Junction Temperature (TJMAX) 150°C
Storage Temperature Range −65°C to +150°C
Lead Temperature, Soldering  
IR Reflow Peak Temperature 220°C
Pb-Free Peak Temperature 260°C
Lead Temperature (Soldering, 10 sec) 300°C
ESD Rating 1500 V
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.


Description

The ADT7476A dBCOOL controller is a thermal monitor and multiple PWM fan controller for noise-sensitive or power-sensitive applications requiring active system cooling. The ADT7476A can drive a fan using either a low or high frequency drive signal and can monitor the temperature of up to two remote sensor diodes plus its own internal temperature. The part also measures and controls the speed of up to four fans, so the fans operate at the lowest possible speed for minimum acoustic noise.

The automatic fan speed control loop optimizes fan speed for a given temperature. The effectiveness of the system's thermal solution can be monitored using the THERM input. The ADT7476A also provides critical thermal protection to the system using the bidirectional THERM pin as an output to prevent system or component overheating.




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