EMC2301

EMC2301 RPM-Based PWM Fan Controller PRODUCT FEATURES Datasheet General Description The EMC2301 is an SMBus compliant fan controller with a PWM fan driver. The 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. Each 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 EMC2301 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 „ Programmable Fan Control circuit (EMC2301) — 4-wire fan compatible — High speed PWM (26 kHz) — Low speed PWM (9.5Hz - 2240 Hz) — Optional detection of aging fans — Fan ...