These converters satisfy the demand for smaller, yet more robust, power supplies with high current but lower voltage requirements. Another advantage is that they use eight dual-diodes with equal current-sharing. This allows each diode to carry an average of 12 A for a 185-A device.
Standing 0.5 in. high, the brick itself is mounted to a power card that is 0.6 in. thick. Available output levels range from 3 to 24 V, with power levels of 800 W to 1 kW. Within the MiniPack are heat-generating devices such as output diodes, ferrite, and transformer windings. These are distributed and bonded to an aluminum-based plate to greatly reduce junction temperatures.
Contact the company for pricing and availability information.
Broadband TelCom Power Inc., 250 Briggs Ave., Costa Mesa, CA 92620; (714) 850-7320; fax (714) 850-7321; Internet: www.btcpower.com.
80-W Switching Power Supply Enhances Electronics Applications The VLT80 series offers single- and quad-output open-frame switching power supplies. Designed for use in a wide variety of electronic products, these devices are both small and efficient. According to their manufacturer, they're the tiniest full-featured 80-W convection-cooled power supplies on the market.Members of the VLT80 family are enclosed in a small 3- by 5- by 1-in. package with densities exceeding 5.3 W/in3. They're also capable of converting ac power to dc power at an efficiency rating of more than 86%.
In this series, there are four single-output options available. Five quad-output versions, including a 3.3-V model at 10 A, are offered as well. All weigh just 10 oz.
Each unit boasts a mean time between failure (MTBF) of up to 200,000 hours. In addition, they meet worldwide safety standards, such as FCC and CE Mark criteria.
The VLT80 series is now available for sampling and ordering. Quad-output models sell in quantities of 100, starting at $77 apiece. Single-output versions can be purchased in quantities of 100, beginning at $61 each. Custom and modified standard versions of the products can also be obtained.
EOS Corp., 1070 Flynn Rd, Camarillo, CA 93012; (805) 484-9998; www.eoscorp.com.
Multiphase Controller Offers Low Static Reference Performance The HIP6311 is the latest in a line of pulse-width modulation (PWM) controller ICs. A multiphase controller, it addresses the precision power requirements of leading microprocessors. This means that the device enables high-speed business computing and Internet data transfer.When coupled with gate drivers, the HIP6311 provides the total core-voltage system for advanced microprocessors. It also meets the static reference tolerance standard—0.8%—of VRM 9.0. The device is targeted toward embedded and VRM 9.0 core dc/dc converters for high-performance PCs. In addition, it will benefit workstations and server motherboards employing next-generation microprocessors.
Available in a 20-pin SOIC package, the HIP6311 is priced at $4.95 in 10,000-piece quantities.
Intersil Corp., (888) INTERSIL, ext. 7981; www.Intersil.com.
Tiny Power-Distribution Switch Designed To Meet USB Standards The SC2041 consists of a single power-distribution switch capable of delivering 500 mA of continuous load current. Its current limit is typically at 0.85 A—well under the 5-A limit required by USB specifications. Capable of switching both 3.3- and 5-V inputs, the SC2041 also boasts a low-on-resistance switch element. This factor ensures that the voltage-drop across the device is only 40 mV (typical) at full load. As a result, designers can easily meet the 350-mV USB voltage-drop specification for a bus-powered hub. The small SO-8 surface-mount packaging and low supply current (100 µA typical) make the device ideal for battery-powered applications.Another feature of the SC2041 is that it contains under-voltage lockout circuitry to guarantee that the switch itself and downstream devices are held off during powerup. Such a feature supports safe hot-plugging of USB peripheral devices. The SC2041 also offers soft-start circuitry with an on-time of 2.0 ms (typical) to limit in-rush current during startup. In addition, it provides a fault notification flag that activates in the event of a short-circuit, under-voltage, or thermal shutdown condition.
Evaluation samples of the SC2041 can be obtained now in SO-8 packaging. Priced at $1.03 in 1000-piece quantities, full production units are available as well.
Semtech Corp., 652 Mitchell Rd, Newbury Park, CA 91320; (805) 498-2111; Internet: www.semtech.com.
Surface-Mountable Power MOSFETs Operate Between −55°C and 125°C A new series of-low RDS(ON) power MOSFETs gives designers layout flexibility, while using the latest in MOSFET technology. Contained in a performance-enhanced package (PEP), these devices are specifically designed to minimize electrical resistance and thermal losses. They're also guaranteed to operate within a temperature range of −55°C to 125°C. The series is comprised of the CMI-5505-CHR, CMI-7007-CHR, and CMI-6009-CHR. These models offer typical on-state resistances of 9, 14, and 30 mΩ, respectively. Each is packaged in a single N-channel MOSFET and priced at $37.50 apiece at 1000 units.Composite Modules Inc., 61 Union St., Attleboro, MA 02703; (508) 226-6969; fax (508) 226-0938; www.cmodules.com.