IR's New Programmable Current-Sensing, High-Side Intelligent Power Switches Increase Reliability in Automotive Systems.EL SEGUNDO, Calif. -- International Rectifier, IR([R]) (NYSE NYSE See: New York Stock Exchange :IRF IRF Interferon Regulatory Factor IRF International Religious Freedom IRF Institut for Rationel Farmakoterapi (German) IRF Inherited Rights Filter (Novell) IRF Inherited Rights Filter ), a world leader in power management technology, today introduced the IR331x family of high-side intelligent power switches (IPS) devices with accurate current-sensing and built-in protection circuits for 14V automotive applications. The new IPS devices enhance reliability in integrated lighting modules, intelligent glow-plug controls, auxiliary positive temperature coefficient Positive Temperature Coefficient (PTC) refers to materials that experience an increase in electrical resistance when their temperature is raised. Materials which have useful engineering applications usually show a relatively rapid increase with temperature, i.e. (PTC (PTC, Needham, MA, www.ptc.com) Long a world leader in mechanical computer-aided design, manufacturing and engineering software, PTC, through acquisitions and reorganization, has transformed itself into a leading provider of Internet-based B2B solutions for discrete manufacturers. ) heaters for HVAC (Heating Ventilation Air Conditioning) In the home or small office with a handful of computers, HVAC is more for human comfort than the machines. In large datacenters, a humidity-free room with a steady, cool temperature is essential for the trouble-free systems, engine cooling fan drivers and interior fan controllers. Anthony Murray, IR's technical marketing manager for Automotive Components, said, "The IR331x family includes all protection functions to ensure safe and reliable automotive switching up to 100 amps. The accurate current-sensing function adds value to microprocessor-based systems and modules by improving diagnostic capabilities." The IR331x family provides accurate current feedback to 5% at maximum load current over the entire operating temperature range and demonstrates improved accuracy at low load current. In pulse width pulse width Pulse duration Cardiac pacing The duration of a pacing pulse in msecs modulated (PWM (Pulse Width Modulation) A modulation technique that generates variable-width pulses to represent the amplitude of an analog input signal. Like its fixed-width pulse density modulation (PDM) cousin, the output switching transistor is on more of the time for a )-controlled applications, the accurate current-sensing feature provides the required feedback that enables a microcontroller or ASIC (Application Specific Integrated Circuit) Pronounced "a-sick." A chip that is custom designed for a specific application rather than a general-purpose chip such as a microprocessor. to control the load current. The current feedback bandwidth is 100kHz, also suitable for topologies where a low-side switch provides high frequency PWM, and enabling protection and load-current sensing for unidirectional The transfer or transmission of data in a channel in one direction only. DC motor drive applications. The current-sensing feature also enables precise monitoring of load current in order to provide additional data to the microcontroller for diagnostic applications. Typical examples include open-load detection for defective bulbs and lamps or early warning of overload conditions. In addition, the IR3316S provides a slow-switching version of the IR3310S, which can help minimize noise in EMI-sensitive automotive applications. In addition to the current-sense feedback, the IR331x family devices integrate over-temperature and over-current shutdown as well as reverse polarity protection, simplifying wiring harnesses and increasing reliability. In many applications, additional protection devices such as fuses can be eliminated. The over-current shutdown protection feature is programmable, which allows optimization according to the requirements of the load or the application. A soft-start mode is included for low-frequency switching. In case of a reverse battery condition, an integrated protection circuit turns the main MOSFET (Metal Oxide Semiconductor Field Effect Transistor) The most popular and widely used type of field effect transistor (see FET). MOSFETs are either NMOS (n-channel) or PMOS (p-channel) transistors, which are fabricated as individually packaged switch on, helping to relieve the intrinsic body diode, reducing or eliminating thermal problems. Additional features such as ESD (1) (Electronic Software Distribution) Distributing new software and upgrades via the network rather than individual installations on each machine. See ESL. protection and an active clamp circuit guarantee safe operation and protection under harsh automotive operating conditions. Pricing and Availability The new IR3313, IR3314, IR3315 and IR3316 are available immediately. For the D2Pak versions, pricing is US $1.95 each for the IR3313S, US $1.68 each for the IR3314S, US $1.44 each for the IR3315S and US $1.95 each for the IR3316S, all in 10,000-unit quantities. Pricing is subject to change. Data sheets and an application note (AN-1118) are available on the Web at http://www.irf.com/whats-new/nr061116.html. About International Rectifier International Rectifier (NYSE:IRF) is a world leader in power management technology. IR's analog and mixed signal ICs, advanced circuit devices, integrated power systems and components enable high performance computing and reduce energy waste from motors, the world's single largest consumer of electricity. Leading manufacturers of computers, energy efficient appliances, lighting, automobiles, satellites, aircraft and defense systems rely on IR's power management benchmarks to power their next generation products. For more information, go to www.irf.com. Trademark Notice IR([R]) is a registered trademark of International Rectifier Corporation. All other product names noted herein may be trademarks of their respective holders. |
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