Archive : 2 April 2008 год

By achieving the seal-tight protection class of IP69K, Schurter is extending the spectrum of potential applications for its already tried-and-tested PSE family of piezo switches. The qualification test was carried out using a high-pressure vapor stream at 90 Bar and a temperature of 80°C. The hermetically sealed piezo switches can now be used in areas, which are regularly disinfected or cleaned using high-pressure cleaners. This renders them ideal for use in applications exposed to high levels of dirt and grime such as food processing, commercial cooking and transportation. Besides the extraordinarily long lifetime of more than 20 million switching cycles, the piezo switches also reveal a high level of robustness due to their stainless steel or aluminum housing.

The following mounting diameters are available as standard: 16, 19, 22, 24, 27 and 30 mm. Other mounting diameters, materials, colors and shapes are possible, according to individual design requirements. Point or ring illumination is offered in mounting sizes 22 mm and up. This feature can be used to illuminate the actuating surface in a continuous mode or to display the switch position on or off. Laser lettering is available and done in house to minimize lead times. A broad range of standard legends and symbols are available. Customer-specific inscriptions are also available.

Microchip announces MCP1790 and MCP1791 high-voltage linear regulators (LDOs). With a continuous 70 mA output, the ability to operate at a continuous input voltage of up to 30V and load-dump protection up to 43.5V, the new LDOs are dedicated for automotive and industrial applications. The MCP179X LDOs were designed for use in applications requiring continuous operation at high input voltages, such as 12V automotive and 24V industrial applications. The built-in load-dump protection feature isolates the voltage transients often found in these types of applications, particularly those in the automotive market. All of this, combined with ceramic output capacitor stability and a low quiescent current of just 70 uA, enables more compact, power-efficient and reliable designs.

Example automotive applications include instrumentation lighting, power windows and locks, and stereo systems. High-voltage industrial applications include security systems, fire alarms, thermostat controls and sensors, among others. Users can choose between the simple 3-pin MCP1790 LDO or the full-featured 5-pin MCP1791 LDO, which offers shutdown and power-good functionality. Both are available in thermally efficient SOT-223 and DDPAK packages.