ADT7463_13 Datasheet, PDF (1/50 Pages) ON Semiconductor – Remote Thermal Controller and Voltage Monitor

ADT7463
Remote Thermal Controller
and Voltage Monitor
The ADT7463 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, and 2.5 V
CPU supply voltages, plus its own supply voltage. 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 ADT7463 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 5 Supply Voltages
• Controls and Monitors up to 4 Fan Speeds
• 1 On−Chip and 2 Remote Temperature Sensors
• Monitors Up to 6 Processor VID Bits
• 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
Thermal Control Circuit via THERM Input
• 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)
• This is a Pb−Free Device
Applications
• Low Acoustic Noise PCs
• Networking and Telecommunications Equipment
http://onsemi.com
QSOP24 NB
CASE 492B
PIN ASSIGNMENT
SDA 1
24 PWM1/XTO
SCL 2
GND 3
V_CC 4
VID0 5
VID1 6
VID2 7
23 V_CCP
22
+2.5V_IN/
SMBALERT
21 +12V_IN/VID5
20 +5V_IN/THERM
19 VID4
ADT7463
18 D1+
VID3 8
17 D1−
TACH3 9
PWM2/
10
SMBALERT
TACH1 11
TACH2 12
16 D2+
15 D2−
14
TACH4/ADDR
SELECT/THERM
13 PWM3/ADDRESS
ENABLE
(Top View)
MARKING DIAGRAM
ADT7463A
RQZ#YYWW
ADT7463ARQZ = 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 49 of this data sheet.
© Semiconductor Components Industries, LLC, 2013
1
May, 2013 − Rev. 7
Publication Order Number:
ADT7463/D