Simple, Automatic Fan-Speed Control
Internal and External Temperature Sensing
Detect Fan Failure Through Locked-Rotor Output, Tachometer Output, or Fan-Supply Current Sensing
Multiple, 1.6% Output Duty-Cycle Steps for Low Audibility of Fan-Speed Changes
Pin-Selectable or Factory-Selectable Low-Temperature Fan Threshold
Pin-Selectable or Factory-Selectable High-Temperature Fan Threshold
Spin-Up Time Ensures Fan Start
Fan-Start Delay Minimizes Power-Supply Load at Power-Up
32Hz PWM Output
Controlled Duty-Cycle Rate-of-Change Ensures Good Acoustic Performance
2°C Temperature-Measurement Accuracy
Active-Low FULLSPD/FULLSPD Input Sets PWM to 100%
Pin-Selectable Active-Low OT Output Threshold
16-Pin QSOP and 10-Pin μMAX Packages
Applications
Desktop Computers
Networking Equipment
Servers
Storage Equipment
Workstations