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ADT7476AARQZ-R Datasheet(PDF) 1 Page - ON Semiconductor |
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ADT7476AARQZ-R Datasheet(HTML) 1 Page - ON Semiconductor |
1 / 69 page © Semiconductor Components Industries, LLC, 2016 February, 2016 − Rev. 7 1 Publication Order Number: ADT7476A/D ADT7476A Remote Thermal Controller and Voltage Monitor The ADT7476A 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. 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 • 5.0 V Support on all TACH and PWM Channels • Meets SMBus 2.0 Electrical Specifications • This Device is Pb-Free, Halogen Free and is RoHS Compliant www.onsemi.com PIN ASSIGNMENT See detailed ordering and shipping information in the package dimensions section on page 68 of this data sheet. ORDERING INFORMATION MARKING DIAGRAMS QSOP−24 NB CASE 492B +2.5VIN/THERM PWM1/XTO VCCP +12VIN/VID5 +5VIN D1+ *TACH4/THERM/SMBALERT/GPIO6/ADDR SELECT VID4/GPIO4 SDA SCL GND VCC VID0/GPIO0 VID1/GPIO1 VID2/GPIO2 PWM2/ SMBALERT 24 23 22 21 20 19 18 17 8 7 6 5 4 3 2 1 ADT7476A 16 9 15 10 14 11 13 12 VID3/GPIO3 TACH3 TACH1 TACH2 D1− D2+ D2− PWM3/ADDREN * (Top View) ADT7476AARQZ = Specific Device Code # = Pb-Free Package YYWW = Date Code xxxx = Assembly Lot Code ADT7476AARQZ #YYWW xxxx |
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