EMC2303-1-KP-TR SMSC, EMC2303-1-KP-TR Datasheet

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EMC2303-1-KP-TR

Manufacturer Part Number
EMC2303-1-KP-TR
Description
Industrial Temperature Sensors Triple RPM Based PWM Fan Speed Controller
Manufacturer
SMSC
Datasheet

Specifications of EMC2303-1-KP-TR

Lead Free Status / Rohs Status
Lead free / RoHS Compliant
PRODUCT FEATURES
General Description
The EMC2303 is an SMBus compliant fan controller with
up to three independently controlled PWM fan drivers.
Each fan driver is controlled by a programmable
frequency PWM driver and Fan Speed Control algorithm
that operates in either a closed loop fashion or as a
directly PWM-controlled device.
The closed loop Fan Speed Control algorithm (FSC) has
the capability to detect aging fans and alert the system.
It will likewise detect stalled or locked fans and trigger
an interrupt.
Additionally, the EMC2303 offers a clock output so that
multiple devices may be chained and slaved to the
same clock source for optimal performance in large
distributed systems.
Applications
SMSC EMC2303
Servers
Projectors
Industrial and Networking Equipment
Notebook Computers
TACH1
TACH2
TACH3
PWM1
PWM2
PWM3
CLK
Drivers
Measurement
PWM
Tach
Fan Speed Control Algorithm
Fan Speed Control Algorithm
Fan Speed Control Algorithm
PRODUCT PREVIEW
Tachometer
Registers
Block Diagram
Limit
Features
Three Programmable Fan Control circuits (EMC2303)
Watchdog Timer
RPM-based fan control algorithm
SMBus 2.0 Compliant
CLK Pin can provide a clock source output
Available in a 12-pin 4mm x 4mm QFN Lead-free
— 4-wire fan compatible
— High speed PWM (26 kHz)
— Low speed PWM (9.5Hz - 2240 Hz)
— Optional detection of aging fans
— Fan Spin Up Control and Ramp Rate Control
— Alert on Fan Stall
— Up to 3 Selectable Default Fan Speeds
— 0.5% accuracy from 500 RPM to 16k RPM (external
— 1% accuracy from 500 RPM to 16k RPM (internal clock)
— Up to 6 selectable SMBus addresses
— SMBus Alert compatible
RoHS Compliant package
Multiple RPM-Based
PWM Fan Controller for
Three Fans
EMC2303
crystal oscillator)
Protocol
SMBus
Slave
ADDR_SEL
SMCLK
SMDATA
ALERT#
Revision 1.2 (03-22-10)
Data Brief

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EMC2303-1-KP-TR Summary of contents

Page 1

... PRODUCT FEATURES General Description The EMC2303 is an SMBus compliant fan controller with up to three independently controlled PWM fan drivers. Each fan driver is controlled by a programmable frequency PWM driver and Fan Speed Control algorithm that operates in either a closed loop fashion directly PWM-controlled device. ...

Page 2

... ORDERING NUMBER EMC2303-1-KP-TR This product meets the halogen maximum concentration values per IEC61249-2-21 For RoHS compliance and environmental information, please visit 80 ARKAY DRIVE, HAUPPAUGE, NY 11788 (631) 435-6000, FAX (631) 273-3123 Copyright © 2010 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 ...

Page 3

... Multiple RPM-Based PWM Fan Controller for Three Fans Package Outline EMC2303 Package Information Figure 1 Package Drawing - 12-Pin QFN 4mm x 4mm SMSC EMC2303 3 PRODUCT PREVIEW Revision 1.2 (03-22-10) ...

Page 4

... Figure 2 Package Dimensions - 12-Pin QFN 4mm x 4mm Figure 3 PCB Footprint - 12-Pin QFN 4mm x 4mm Revision 1.2 (03-22-10) Multiple RPM-Based PWM Fan Controller for Three Fans 4 PRODUCT PREVIEW SMSC EMC2303 ...

Page 5

... LINE: 3 – Last 7 digits of Lot Number LINE: 4 – Revision and Country Code (RCC) SMSC EMC2303 TOP 0. PB-FREE/GREEN SYMBOL PIN 1 (Matte Sn) LINES CENTER HORIZONTAL ALIGNMENT LINE 4: LEFT HORIZONTAL ALIGNMENT BOTTOM BOTTOM MARKING NOT ALLOWED Figure 4 EMC2303 Package Markings 5 PRODUCT PREVIEW 3x 0.56 Revision 1.2 (03-22-10) ...

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