EMC6D102 Fan Control Device with Hardware Monitoring and Acoustic Noise Reducti

EMC6D102
Fan Control Device with
Hardware Monitoring
and Acoustic Noise
Reduction Features
PRODUCT FEATURES
„
„
„
Data Brief
3.3 Volt Operation (5 Volt Tolerant Input Buffers)
SMBus 2.0 compliant interface (Fixed, Not
Discoverable) With Three Slave Address Options
Fan Control
„
— Monitor Power supplies (+2.5V, +5V, +12V, Vccp, and
VCC)
— Individual status and enable bits per voltage input
— Limit Comparison of all Monitored Values
— Interrupt Pin for out-of-limit Voltage Indication
— Supports 4 programmable voltage averaging modes
— 2 monitoring modes: Continuous or Cycle (Power
Saving mode)
— Offers 2 Low Power Modes when monitoring is off:
Sleep and Shutdown
—
—
—
—
PWM (Pulse width Modulation) Outputs (3)
Fan Tachometer Inputs (4)
Individual status and enable bits per tach input
Programmable automatic fan control based on
temperature
— Fan ramp rate control for acoustic noise reduction
„
Temperature Monitor
— Monitoring of Two Remote Thermal Diodes (+/- 3 deg
C accuracy)
— Internal Ambient Temperature Measurement
— Limit Comparison of all Monitored Values
— Individual status and enable bits per thermal input
— Interrupt Pin for out-of-limit Temperature Indication
— Configurable offset for internal or external temperature
channels.
— Supports 4 programmable temperature averaging
modes
— 2 monitoring modes: Continuous or Cycle (Power
Saving mode)
— Offers 2 Low Power Modes when monitoring is off:
Sleep and Shutdown
SMSC EMC6D102
Voltage Monitor
„
„
„
5 VID (Voltage Identification) inputs
XOR Tree test mode
24-pin, SSOP Lead-Free RoHS Compliant package
PRODUCT PREVIEW
Revision 0.4 (09-25-07)
Fan Control Device with Hardware Monitoring and Acoustic Noise Reduction Features
ORDER NUMBERS:
EMC6D102-CZC FOR 24 PIN, SSOP LEAD-FREE ROHS COMPLIANT PACKAGE
EMC6D102-CZC-TR FOR 24 PIN, SSOP LEAD-FREE ROHS COMPLIANT PACKAGE
80 ARKAY DRIVE, HAUPPAUGE, NY 11788 (631) 435-6000, FAX (631) 273-3123
Copyright © 2007 SMSC or its subsidiaries. All rights reserved.
Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for
construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC
reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications
before placing your product order. The provision of this information does not convey to the purchaser of the described semiconductor devices any licenses under any patent
rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated
version of SMSC's standard Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement"). The product may contain design defects or errors
known as anomalies which may cause the product's functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not
designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property
damage. Any and all such uses without prior written approval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the customer. Copies of
this document or other SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSC’s website at http://www.smsc.com. SMSC is a registered
trademark of Standard Microsystems Corporation (“SMSC”). Product names and company names are the trademarks of their respective holders.
SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION ANY AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND AGAINST INFRINGEMENT AND THE LIKE, AND ANY AND ALL WARRANTIES ARISING FROM ANY COURSE
OF DEALING OR USAGE OF TRADE. IN NO EVENT SHALL SMSC BE LIABLE FOR ANY DIRECT, INCIDENTAL, INDIRECT, SPECIAL, PUNITIVE, OR CONSEQUENTIAL
DAMAGES; OR FOR LOST DATA, PROFITS, SAVINGS OR REVENUES OF ANY KIND; REGARDLESS OF THE FORM OF ACTION, WHETHER BASED ON CONTRACT;
TORT; NEGLIGENCE OF SMSC OR OTHERS; STRICT LIABILITY; BREACH OF WARRANTY; OR OTHERWISE; WHETHER OR NOT ANY REMEDY OF BUYER IS HELD
TO HAVE FAILED OF ITS ESSENTIAL PURPOSE, AND WHETHER OR NOT SMSC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
Revision 0.4 (09-25-07)
2
PRODUCT PREVIEW
SMSC EMC6D102
Fan Control Device with Hardware Monitoring and Acoustic Noise Reduction Features
General Description
The EMC6D102 is an environmental monitoring device with automatic fan control capability. This ACPI
compliant device provides hardware monitoring for up to five voltages and three thermal zones,
measures the speed of up to four fans, and controls the speed of multiple DC fans using Pulse Width
Modulator (PWM) outputs.
The EMC6D102 hardware monitor provides analog inputs for monitoring external voltages of +2.5V,
+5V, +12V and Vccp. This device has the capability to monitor its own internal VCC power supply,
which may be connected to either main power (VCC) or the suspend power well (VTR). In addition to
monitoring the processor voltage, VID inputs are available to identify the voltage specification. External
components are not required for voltage scaling or similar treatment.
The EMC6D102 hardware monitor includes support for monitoring three thermal zones: two external
and one internal. The external temperatures are measured via thermal diode inputs capable of
monitoring remote devices. In addition, they are equipped with an ambient temperature sensor for
measuring the internal temperature.
Pulse Width Modulators (PWM) control the speed of the fans by varying the output duty cycle of the
PWM. Each PWM can be associated with any or all of the thermal zones monitored. As the
temperature of the associated zone varies, the PWM duty cycle is adjusted accordingly. The Ramp
Rate Control feature controls the rate of change of the PWM output, thereby reducing system noise
created by changing the fan speed. The speed of each fan is monitored by a Fan Tachometer input.
The measured values are compared to values stored in Limit Registers to detect if a fan has stalled
or seized.
Fan speed may be under host software control or automatic. In host control mode, the host software
continuously monitors temperature and fan speed registers, makes decisions as to desired fan speed
and sets the PWM’s to drive the required fan speed. This device offers an interrupt output signal
(INT#), which may be used to interrupt the host on out-of-limit temperature or voltage condition
enabling an ACPI response as opposed to the host software continuously monitoring status. In auto
“zone” mode, the logic continuously monitors the temperature and fan speeds and adjusts speeds
without intervention from the host CPU. Fan speed is adjusted according to an algorithm using the
temperature measured in the selected zone, the high and low limits set by the user, and the current
fan speed.
SMSC EMC6D102
3
PRODUCT PREVIEW
Revision 0.4 (09-25-07)
Fan Control Device with Hardware Monitoring and Acoustic Noise Reduction Features
Pin Layout Diagram
SDA
1
24
PWM1/xTest Out
SCL
2
23
Vccp
VSS
3
22
2.5V
VCC
4
21
12V
VID0
5
20
5V
VID1
6
19
VID4
EMC6D102
VID2
7
18
Remote1+
VID3
8
17
Remote1-
TACH3/INT#
9
16
Remote2+
PWM2/INT#
10
15
Remote2-
TACH1
11
14
TACH4/Address Select
TACH2
12
13
PWM3/Address Enable
Figure 1 EMC6D102 Pin Diagram
Revision 0.4 (09-25-07)
4
PRODUCT PREVIEW
SMSC EMC6D102
Fan Control Device with Hardware Monitoring and Acoustic Noise Reduction Features
Package Outline
Figure 2 24-Pin SSOP Package Outline, 0.150” Wide Body, 0.025” Pitch
Table 1 24-pin SSOP Package Parameters
A
A1
A2
D
E
E1
H
L
e
è
W
ccc
MIN
NOMINAL
MAX
REMARKS
0.053
0.004
~
0.337
0.228
0.150
0.007
0.016
~
~
~
~
~
~
~
0.025
0.025 Basic
~
0.010
~
0.069
0.010
0.061
0.344
0.244
0.157
0.010
0.050
Overall Package Height
Standoff
Body Thickness
X Body Size
Y Span
Y body Size
Lead Frame Thickness
Lead Foot Length
Lead Pitch
Lead Foot Angle
Lead Width
Coplanarity
0o
0.008
~
8o
0.012
0.004
Notes:
1. Controlling Unit: inch.
2. Tolerance on the true position of the leads is ± 0.0035 inches maximum.
3. Package body dimensions D and E1 do not include the mold protrusion. Maximum mold protrusion
is 0.006 inches for ends, and 0.010 inches for sides.
4. Dimension for foot length L measured at the gauge plane 0.010 inches above the seating plane.
5. Details of pin 1 identifier are optional but must be located within the zone indicated.
SMSC EMC6D102
5
PRODUCT PREVIEW
Revision 0.4 (09-25-07)
Similar pages