Product Summary

The US79KUA is a Smart Fan Control Hall IC. It is designed for 5V and 12V cooling commutation. The US79KUA contains many features to allow survival in a harsh environment. The IC was designed to eliminate all discrete components such as capacitors, resistors, transistors, diodes, PC board and associated labor, replacing US$0.25 to US$0.35 in direct cost. The applications of the US79KUA include Fan sizes up to 90mm, Current range up to 400mA.

Parametrics

US79KUA absolute maximum ratings: (1)Supply Voltage, VDD: (-0.3 to 18)V; (2)Output Current (Fault), IOUT 500mA; (3)Operating Temperature Range, TA: -40 to 125℃; (4)Storage Temperature Range, TS: -55 to 165℃; (5)Maximum Junction Temp, TJ: 150℃.

Features

US79KUA features: (1)Built-in Reverse Voltage Protection; (2)Built-in RFI Filter; (3)Power Efficient CMOS and Power MOSFET Drivers allow 400mA without overheating; (4)Built-in Zener Diodes Protect Outputs; (5)Eliminate all Fan Components; (6)Eliminate PC Board; (7)5V and 12V Operation; (8)High Sensitivity for switching symmetry; (9)Locked Rotor Shutdown.

Diagrams

US79KUA block diagram