Acutechnology Announces Precision Adjustable Thermal Switch for Over-Temperature Protection

SAN JOSE, Calif., Nov. 14 2006-- Acutechnology Semiconductor Inc., focused on increasing the thermal management product portfolio, today launched the AQ297, a five terminal precision adjustable, low quiescent current, solid state thermostat. The chip is specifically designed to protect system from over-heating and batteries, from charging or discharging outside of the safe temperature range. The AQ297 device provides an alarm at hot temperatures. The temperature trip point can be adjusted from temperatures of +40C to temperatures in excess of +150C. Thermal hysteresis is internally programmed. The solution is ideal for accurate over-temperature protection. The device accuracy is ±3 degrees. Its low quiescent current makes it especially suited for battery packs where the trip temperature has to be adjusted to any value with the use of a simple external resistor. The AQ297 samples are currently available upon request.

“We believe that thermal management applications with specific focus in the area of battery thermal protection, need flexible, accurate and low cost solutions” said Wayne Luty Director of Business Development. “Typically a thermal sensor, voltage reference, and comparator are used to sense temperature and make a decision when the temperature exceeds safe levels. The AQ297 is an integrated, simple to use, more accurate and, most importantly, adjustable solution. The flexibility provided by setting the trip temperature with an external resistor is very valuable in power systems where different models need diverse over-temperature protection.”

For use in a wide variety of power electronic applications, the AQ297 output is an open drain output that can sink up to 50mA when the threshold temperature is reached. During normal operation of the system, VCC can be powered with any voltage from 2V to 16V, while drawing less than 100uA. The Over Temperature pin (open drain) is off (high impedance). As the temperature moves above the set point, the output will turn on and conduct to provide an alarm, or drive an active device with up to 50 mA sink capability. With VCC kept uninterrupted, the output will stay on until the temperature drops below the set point minus hysteresis. Output will then turn off and no longer conduct. It will turn on again only after the temperature exceeds the Set Point.

The AQ297 is featured in the common SOT23-5 package. For applications with stringent space requirements, the ultra small SC70 package is offered.

About Acutechnology

Acutechnology Semiconductor Inc., headquartered in San Jose, California, is dedicated to servicing the power management marketplace. With decades of experience in the design, manufacture, and marketing of analog products, Acutechnology is working to provide new and innovative solutions in this very cost-conscious marketplace. Acutechnology designs custom and standard product in a variety of semiconductor technologies. Using a global manufacturing infrastructure, Acutechnology combines its expertise to that of its manufacturing partners to maintain the highest levels of quality and service.

For more information about Acutechnology Semiconductor Inc., visit their web site: