MAXIM Integrated Products, represented by Arrow Electronics , has introduced the MAX6641, a small, low-cost single temperature sensor and fan controller in an MSOP package that saves board space.
The MAX6641 monitors its own temperature and the temperature of an external diode-connected transistor up to 100°C with an accuracy of ±1°C.
The device uses this temperature data to automatically adjust the speed of a cooling fan. The combination of small package and automatic fan control makes the MAX6641 the right candidate for a variety of cost-sensitive applications such as notebook and personal computers.
The MAX6641 features an easy-to-use SMBus interface that makes the data available to the system at any time. The internal PWM fan-speed controller uses the temperature data to adjust the speed of a cooling fan. This minimises unwanted fan noise and power drain when the system is running cool, but provides maximum cooling when required.
The MAX6641 also has a programmable alarm output, which can be used to generate interrupt, throttle, or overtemperature shutdown signals. Its small, 8-pin MSOP package (3mm x 3mm) saves board space, which is important in portable applications.
The MAX6641 operates from an input voltage range of 3.0V to 5.5V and only consumes 500 microamps of supply current.