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Semiconductor Components Industries, LLC, 2012
April, 2012 − Rev. 3
1 Publication Order Number:
ADM1033/D
ADM1033
Thermal Monitor and Fan
Speed (RPM) Controller
The ADM1033 is a one channel remote- and local-temperature
sensor and fan controller. The remote channel monitors the
temperature of the remote thermal diode, which may be discrete
2N3904/6s or may be located on a microprocessor die. The device also
monitors its own ambient temperature.
The ADM1033 can monitor and control the speed of cooling fan.
The user can program a target fan speed, or else use the look-up table
to input a temperature-to-fan speed profile. The look-up table can be
configured to run the fans at discrete speeds (discrete mode) or to ramp
the fan speed with temperature (linear mode).
The ADM1033 communicates over a 2-wire SMBus 2.0 interface.
An 8-level LOCATION input allows the user to choose between
SMBus 1.1 and SMBus 2.0. An ALERT
output indicates error
conditions. The THERM
I/O signals overtemperature as an output and
times THERM
assertions as an input. Pin 8 can be configured as a
reference for the THERM
(PROCHOT) input.
Features
1 Local and Remote Temperature Channels
1C Accuracy on Local and Remote Channels
Automatic Remote Temperature Channel, Up to 1 kW
Fast (Up to 64 Measurements per Second)
SMBus 2.0, 1.1, and 1.0 Compliant
SMBus Address Input/LOCATION Input to UDID
Programmable Over/Undertemperature Limits
Programmable Fault Queue
SMBusALERT Output
Fail-Safe Overtemperature Comparator Output
Fan Speed (RPM) Controller
Look-up Table for Temperature-to-Fan Speed Control
Linear and Discrete Options for Look-up Table
FAN_FAULT Output
THERM Input, Used to Time PROCHOT Assertions
REF Input, Used as Reference for THERM (PROCHOT)
3.0 V to 5.5 V Supply
Small 16-lead QSOP Package
This is a Pb-Free Device*
Applications
Desktop and Notebook PCs
Embedded Systems
Telecommunications Equipment
LCD Projectors
* For additional information on our Pb-Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
http://onsemi.com
PIN ASSIGNMENT
(Top View)
See detailed ordering and shipping information in the package
dimensions section on page 34 of this data sheet.
ORDERING INFORMATION
1033ARQZ = Specific Device Code
# = Pb-Free Package
YY = Date Code
WW = Work Week
MARKING DIAGRAM
QSOP−16
CASE 492
ALERT
SCL
SDA
LOCATION
NC
D1+
D1−
NC
DRIVE1
TACH1
ALERT
Comp
NC
GND
V
CC
THERM
FAN_FAULT/REF
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
ADM1033
1033A
RQZ
#YYWW
页面指南
