ADT7460ARQ-REEL Datasheet, PDF (1/47 Pages) ON Semiconductor – Remote Thermal Monitor and Fan Controller

ADT7460
Remote Thermal Monitor
and Fan Controller
The ADT7460 controller is a thermal monitor and multiple PWM
fan controller for noise-sensitive applications requiring active system
cooling. 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 automatic fan speed control
loop optimizes fan speed for a given temperature. A unique dynamic
T_MIN control mode enables the system thermals/acoustics to be
intelligently managed. The effectiveness of the system’s thermal
solution can be monitored using the THERM input. The ADT7460
also provides critical thermal protection to the system by using the
bidirectional THERM pin as an output to prevent system or
component overheating.
Features
• Controls and Monitors Up to 4 Fans
• 1 On-chip and 2 Remote Temperature Sensors
• Dynamic T_MIN Control Mode Optimizes System Acoustics
Intelligently
• 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
• Processor Thermal Control Circuit via THERM Input
• 2-wire and 3-wire Fan Speed Measurement
• Limit Comparison of All Monitored Values
• This is a Pb-Free Device
Applications
• Low Acoustic Noise PCs
• Networking and Telecommunications Equipment
http://onsemi.com
QSOP−16
CASE 492
PIN ASSIGNMENT
SCL 1
GND 2
V_CC 3
TACH3 4
PWM2/
SMBALERT
5
TACH1 6
TACH2 7
PWM3/ ₈
ADDR ENABLE
ADT7460
(Top View)
16 SDA
15 PWM1/XTO
14 V_CCP
13 D1+
12 D1−
11 D2+
10 D2−
9 ^TACH4/ADDR
SELECT/
THERM
MARKING DIAGRAM
T7460A
RQZ
#YYWW
T7460ARQZ= Specific Device Code
#
= Pb-Free Package
YY
= Date Code
WW
= Work Week
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 46 of this data sheet.
© Semiconductor Components Industries, LLC, 2013
1
September, 2013 − Rev. 9
Publication Order Number:
ADT7460/D