EMC2104 Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown Datasheet PRODUCT FEATURES General Description Features Two Programmable Fan Control circuits The EMC2104 is an SMBus compliant fan controller with 4-wire fan compatible up to five (up to 4 external and 1 internal) temperature High speed PWM (26khz) channels. The fan drivers can be operated using two Low speed PWM (9.5Hz - 2240Hz) methods each with two modes. The methods include an Optional detection of aging fans RPM based Fan Speed Control Algorithm and a direct RPM based fan control algorithm drive setting. The modes include manually programming 2% accuracy from 500RPM to 16k RPM the desired settings or using the internal programmable Temperature Look-Up Table temperature look-up table to select the desired setting Allows programmed fan response to temperature based on measured temperature. 1 to 4 thermal zones to control each fan driver Controls fan speed or drive setting The temperature monitors offer 1C accuracy (for Allows externally generated temperature data to control external diodes) with sophisticated features to reduce fan drivers including two DTS channels errors introduced by series resistance and beta variation Up to Four External Temperature Channels of substrate thermal diode transistors commonly found Designed to support 45nm, 60nm, and 90nm CPUs in processors. Automatically detects and supports CPUs requiring the BJT or Transistor models The EMC2104 also includes a hardware programmable Resistance error correction temperature limitS and dedicated system shutdown 1C accurate (60C to 100C) output for thermal protection of critical circuitry. 0.125C resolution Detects fan aging and variation Applications Up to three thermistor compatible voltage inputs Notebook Computers Hardware Programmable Thermal Shutdown Embedded Applications Temperature Cannot be altered by software Projectors 60C to 122C Range or 92C to 154C Range Industrial and Networking Equipment Programmable High and Low Limits for all channels 3.3V Supply Voltage SMBus 2.0 Compliant SMBus Alert compatible Available in 20-pin QFN Package - Lead Free RoHS compliant (4mm x 4mm) SMSC EMC2104 DATASHEET Revision 1.78 (02-28-11) Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown Datasheet Order Number(s): ORDERING NUMBER PACKAGE FEATURES EMC2104-BP-TR 20 pin QFN Lead-Free Two PWM fan drivers, up to 4 external diode RoHS compliant measurement channels, one Critical / Thermal Shutdown inputs. REEL SIZE IS 4,000 PIECES This product meets the halogen maximum concentration values per IEC61249-2-21 For RoHS compliance and environmental information, please visit www.smsc.com/rohs 80 ARKAY DRIVE, HAUPPAUGE, NY 11788 (631) 435-6000, FAX (631) 273-3123 Copyright 2011 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 (theTerms of Sale Agreemen). 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 SMSCs website at