Microchip EMC2301-1-ACZL-TR Single Closed Loop RPM-PWM Fan Speed Controller, Alert, I2C/SMBus, 8 MSO

Technical description of the product (EMC2301-1-ACZL-TR):

Single Closed Loop RPM-Based PWM Fan Speed Controller with Alert and I2C/SMBus interface, 8 MSOP 3x3mm package. 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. Features: 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.