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1 / 56 page ADM1027* dBCOOL™ Remote Thermal Controller and Voltage Monitor *Protected by U.S. Patent Nos. 6,188,189; 6,169,442; 6,097,239; 5,982,221; and 5,867,012. Other patents pending. FEATURES Monitors up to 5 Supply Voltages Controls and Monitors up to 4 Fan Speeds 1 On-Chip and 2 Remote Temperature Sensors Monitors up to 5 Processor VID Bits Automatic Fan Speed Control Mode Controls System Cooling Based on Measured Temperature Enhanced Acoustic Mode Dramatically Reduces User Perception of Changing Fan Speeds 2-Wire and 3-Wire Fan Speed Measurement Limit Comparison of All Monitored Values Meets SMBus 2.0 Electrical Specifications (Fully SMBus 1.1 Compliant) APPLICATIONS Low Acoustic Noise PCs Networking and Telecommunications Equipment FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION The ADM1027 dBCOOL controller is a complete systems monitor and multiple PWM fan controller for noise sensitive applications requiring active system cooling. It can monitor 12 V, 5 V, 2.5 V CPU supply voltage, plus its own supply volt- age. It can monitor the temperature of up to two remote sensor diodes, plus its own internal temperature. It can measure and control the speed of up to four fans so that they operate at the lowest possible speed for minimum acoustic noise. The auto- matic fan speed control loop optimizes fan speed for a given temperature. Once the control loop parameters are programmed, the ADM1027 can vary fan speed without CPU intervention. BAND GAP REFERENCE 10-BIT ADC INPUT SIGNAL CONDITIONING AND ANALOG MULTIPLEXER GND SERIAL BUS INTERFACE SCL SDA VID REGISTER FAN SPEED COUNTER ADDRESS POINTER REGISTER ADM1027 VALUE AND LIMIT REGISTERS LIMIT COMPARATORS PWM CONFIGURATION REGISTERS INTERRUPT STATUS REGISTERS BAND GAP TEMP. SENSOR VID4 VID3 VID2 VID1 VID0 PWM REGISTERS AND CONTROLLERS PWM1 PWM2 VCC TO ADM1027 AUTOMATIC FAN SPEED CONTROL PWM3 TACH1 TACH2 TACH3 TACH4 INTERRUPT MASKING SMBALERT ACOUSTIC ENHANCEMENT CONTROL VCC D1+ D1– D2+ D2– +5VIN +12V IN +2.5V IN V CCP SMBUS ADDRESS SELECTION ADDR EN ADDR SELECT ©2010 SCILLC. All rights reserved. Publication Order Number: May 2010 - Rev. 3 ADM1027/D |
Số phần tương tự - ADM1027ARQZ-RL71 |
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Mô tả tương tự - ADM1027ARQZ-RL71 |
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