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Fan Controller ICs

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What Are Fan Controller ICs?

Fan controller ICs are devices that integrate Pulse-Width Modulation (PWM) controllers with temperature sensors, ramp rate control, spin-up algorithms and look-up tables for setting the fan speed (PWM duty cycle) according to the measured temperature and ramp rate control. These devices are a great fit if you have limited software resources but need to get to market quickly.

Featured Fan Controller ICs

EMC2301

RPM-Based PWM Fan Controller for One Fan

One PWM fan driver
Closed-loop or direct I2C driver
0.5% tach accuracy

Explore EMC2301

EMC2305

Multiple RPM-Based PWM Fan Controller for Five Fans

Five PWM fan drivers
Closed-loop or direct I2C driver
Spin-up and ramp-rate control

Explore EMC2305

EMC2104

Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown

Two RPM fan drivers
Five temperature monitoring channels
Look-up table for eight PWM-to-temperature setting

Explore EMC2104

Microcontroller (MCU)-Based Alternatives

MCUs present a cost-effective solution with opportunities for Bill of Materials (BOM) consolidation and customizable fan control. When compared to ICs, MCUs are more flexible but require time for the initial software development.