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.
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
APPLICATIONs
◾ Servers
◾ Projectors
◾ Industrial and Networking Equipment
◾ Notebook Computers