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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.
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.
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
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
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
Featured MCUs
PIC16F18126/46
8-bit Advanced Analog MCU
- Six PWM channels
- Six timers for measuring fan speed
- 12-bit differential ADC with computation
PIC18-Q24
Designed for Multi-Voltage Analog Applications
- Three 16-bit PMW fan drivers with dual outputs
- Six timers with a hardware limit timer for safety
- 10-bit ADC with computation
AVR-DD
Versatile MCUs With Multi-Voltage I/O and Advanced Security
- Six PWM channels
- Five timers
- 12-bit ADC