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Thermal Management
Evaldo Marty Miranda Staff Design Engineer Thermal System Monitoring Group Analog Devices August 22-24, 2000
Fall 2000
ANALOG DEVICES
Copyright 2000 Intel Corporation.
www.analog.com/temp-sensors
Agenda
Active Thermal Management Thermal Management with ACPI Thermal Sensing Speed Control
Accurate Need
Fall 2000
ANALOG DEVICES
www.analog.com/temp-sensors
Copyright 2000 Intel Corporation.
Active Thermal Management
TCPU
Thermal Zones Thermal Zones Total System Power Form Factor Fans (PS, CPU, Chassis) Audible Noise Cost
System Thermal Regulation
Fall 2000
Shutdown
Fans
Heat Sink
Highest Perf Optimal Thermal Noise Highest Perf Optimal Thermal Noise
Copyright 2000 Intel Corporation. System Thermal Regulation previously known "Thermal Throttling"
ANALOG DEVICES
www.analog.com/temp-sensors
Agenda
Active Thermal Management Thermal Management with ACPI Thermal Sensing Speed Control
Accurate Need
Fall 2000
ANALOG DEVICES
www.analog.com/temp-sensors
Copyright 2000 Intel Corporation.
Thermal Management ACPI
Fall 2000
ALERT#
TCPU
_CRT
Shutdown
SMBUS
_PSV Event _AC0 _AC1
System Thermal Regulation
Cooling Methods
Performance Active (_ACx) Silence Passive (_PSV)
Fans High Speed Speed
Software Control comply with ACPI 1.0b Software Control comply with ACPI 1.0b
Copyright 2000 Intel Corporation.
ANALOG DEVICES
www.analog.com/temp-sensors
Agenda
Active Thermal Management Thermal Management with ACPI Thermal Sense Speed Control
Accurate Need
Fall 2000
ANALOG DEVICES
www.analog.com/temp-sensors
Copyright 2000 Intel Corporation.
Accurate Thermal Sense
Thermal Zones Thermal Zones
Fall 2000
TCPU
System Thermal Regulation
Shutdown Below DESIGN
Fans
Accurate Thermal Sensing Reduces Thermal Solution Guard band Active Control Reduces Audible Noise
Heat Sink
Thermal Solution (Heatsink/Fan) Guard band
Best Performance closest Best Performance closest
Copyright 2000 Intel Corporation.
ANALOG DEVICES
www.analog.com/temp-sensors
Accurate Thermal Sense
Temperature Errors
Board Board
Fall 2000
ASIC ASIC
Reduce Source Temp Errors Reduce Source Temp Errors
Copyright 2000 Intel Corporation.
ANALOG DEVICES
www.analog.com/temp-sensors
Accurate Thermal Sense
Thermal Diode Variation
Diode Diode
N'IC
Fall 2000
1.008
VBEN
100oC
[[ln 248uV
Temp Variation from Diode 1.5ooC Temp Variation from Diode
Copyright 2000 Intel Corporation. Data compiled Analog Devices, characterization multiple chip thermal diodes
ANALOG DEVICES
www.analog.com/temp-sensors
Accurate Thermal Sense
Board Temp Errors
Board Board
V'BE
Fall 2000
Layout Layout
10mil 5mil 10mil
Total Trace Resistance 1.3*R
Trace Resistance 1ooC Temp Error Trace Resistance Temp Error
ANALOG DEVICES
www.analog.com/temp-sensors
Copyright 2000 Intel Corporation.
Accurate Thermal Sense
Board Temp Errors (Noise)
DIODE DIODE
ILKG
Fall 2000
Board Board
V'BE
5mil 5mil 10mil 5mil 10mil 5mil 5mil
ILKG
V'BE
NLKG)
248uV
Grounded Guards Avoid Temp Errors Grounded Guards Avoid Temp Errors
Copyright 2000 Intel Corporation.
ANALOG DEVICES
www.analog.com/temp-sensors
Accurate Thermal Sense
System Thermal Accuracy
Thermal Diode Thermal Diode Board Board
Fall 2000
ASIC ASIC
TDIODE 1.5ooC TDIODE
0.5ooC
High Accuracy High Accuracy TASIC TASIC
(60ooC-100ooC)
Achieve Thermal Accuracy Achieve Thermal Accuracy
Copyright 2000 Intel Corporation.
3ooC
ANALOG DEVICES
www.analog.com/temp-sensors
Accurate Thermal Sense
TCPU
Thermal Regulation
Fall 2000
Increased
Design (Guard Band)
Highest High Accuracy Thermal Sense Highest High Accuracy Thermal Sense
ANALOG DEVICES
www.analog.com/temp-sensors
Copyright 2000 Intel Corporation.
Agenda
Active Thermal Management Thermal Management with ACPI Thermal Sensing Speed Control
Accurate Need
Fall 2000
ANALOG DEVICES
www.analog.com/temp-sensors
Copyright 2000 Intel Corporation.
Speed Control
Fall 2000
Half Speed Speed Control
Linear
Software (BIOS Control
Automatic Speed Control
Wide Speed Range ~30% 100%) Software (RPM) Automatic Control (TCPU) Fail-Safe OverTemp, Stalled Fan) Single Dual Fans
ANALOG DEVICES
www.analog.com/temp-sensors
Copyright 2000 Intel Corporation.
Speed Control
Linear Speed Control
Software
Fall 2000
Control
Single fans same drive
ADM1022 //28 ADM1022 ADM1024 ADM1024
+12V ALERT VFan
Drive
SMBUS
Chipset
ANALOG DEVICES
www.analog.com/temp-sensors
Copyright 2000 Intel Corporation.
Speed Control
Speed Control
Fall 2000
Automatic (TCPU Speed Control
Duty Cycle 100%
Single (3-wire 2-wire) Dual Fans (ADM1031)
ADM1030/31 ADM1030/31
+3.3V ALERT
+12V
SMBUS
Fan_Fault Therm
Tach Tach
ANALOG DEVICES
www.analog.com/temp-sensors
Copyright 2000 Intel Corporation.
Speed Control
Automatic Control
Fall 2000
Control Mode allows Fans with wide tolerance
Software sets Speed Temp ADM1030/31 Monitors Controls Speed
Automatic Speed Control Software sets Programmable operating limits speed Temp (closed loop control) Optimum Speed Temp Minimum audible noise
ANALOG DEVICES
www.analog.com/temp-sensors
Copyright 2000 Intel Corporation.
Speed Control
Automatic Speed Control
Programmable Spin-up Time
Fall 2000
Programmable Tmin Tmax Range
Programmable Spin-up Time depends size Programmable Tmin Tmax Range Control
ANALOG DEVICES
www.analog.com/temp-sensors
Copyright 2000 Intel Corporation.
Summary
Fall 2000
Accurate Thermal Sensing enables Highest System Performance Active Speed Control Allows Efficient Thermal Solution while Reducing Audible Noise ADM1023 ADM1030/31 offers ACPI Compatibility with Accurate Thermal Sense Speed Control
ANALOG DEVICES
www.analog.com/temp-sensors
Copyright 2000 Intel Corporation.
Call Action
Fall 2000
Most Accurate Thermal Sensing Control Highest Performance with Lowest Acoustic Noise Lowest Cost.
ANALOG DEVICES
www.analog.com/temp-sensors
Copyright 2000 Intel Corporation.
Collateral
Demos
Fall 2000
booth suite Paul Errico
Marketing Manager, Temperature System Monitoring Products, 1487 1010 paul.errico@analog.com
ANALOG DEVICES
www.analog.com/temp-sensors
Copyright 2000 Intel Corporation.
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