TelCom Semiconductor has two additions to its line of fan controllers, the TC650 and TC651.
These devices integrate a temperature sensor and a brushless DC fan controller with over temperature alert in a small eight-pin MSOP package.
The pulse width modulation fan speed controllers improve system reliability, reduce acoustic fan noise, extend fan life and lower average operating current.
They are specifically designed for a variety of modern electronic equipment ranging from notebook and personal computers to set-top boxes and networking equipment.
The TC650 and TC651 drive any standard two-wire fan through a low cost transistor or logic level MOSFET and provide temperature proportional fan speed control, whereby the fan speed is increased linearly from 40% speed to 100% speed based on a user-programmed temperature range.
These integrated circuits manage fan speed based on the measured junction temperature with a typical accuracy of &#plusmn;2% from 25 to 70&#deg;C.
These devices operate from 2.8 to 5.5 V and feature a low operating current of 60 uA typical.
They eliminate the need for additional temperature sensors with the inclusion of an on-chip over temperature alarm. These user-friendly devices do not require any additional software.
The TC650 also features a minimum fan speed setting functionality, while the TC651 has an auto shutdown mode should temperature fall below the factory set point.
Phone: 03 9737 4900
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