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EMC2302 Datasheet(PDF) 1 Page - SMSC Corporation |
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EMC2302 Datasheet(HTML) 1 Page - SMSC Corporation |
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1 / 44 page  SMSC EMC2302 DATASHEET Revision 1.1 (10-12-09) Datasheet PRODUCT FEATURES EMC2302 Dual RPM-Based PWM Fan Controller General Description The EMC2302 is an SMBus compliant fan controller with up to two 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 EMC2302 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 Servers Projectors Industrial and Networking Equipment Notebook Computers Features Two Programmable Fan Control circuits (EMC2302) — 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 Watchdog Timer RPM-based fan control algorithm — 0.5% accuracy from 500 RPM to 16k RPM (external crystal oscillator) — 1% accuracy from 500 RPM to 16k RPM (internal clock) SMBus 2.0 Compliant — SMBus Alert compatible CLK Pin can provide a clock source output Available in a 10-pin MSOP Lead-free RoHS Compliant package Block Diagram SMBus Slave Protocol PWM Drivers SMCLK SMDATA Tachometer Limit Registers Tach Measurement CLK ALERT# Fan Speed Control Algorithm Fan Speed Control Algorithm TACH1 TACH2 PWM1 PWM2 |
Similar Part No. - EMC2302 |
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Similar Description - EMC2302 |
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