Power Electronics

New Products

LDO Regulator

Microchip Technology's MCP1703 is a low-dropout regulator (LDO) ideal for applications requiring long battery run-times and high tolerance for input-voltage variations. The LDO is able to supply 250 mA, with 2-µA quiescent current, and an input voltage up to 16 V. The LDO also features device- and circuit-protection capabilities, such as overcurrent protection and thermal shutdown. Additionally, with highly accurate output-voltage regulation, including ±2% overtemperature accuracy, the MCP1703 helps to ensure smooth, reliable system operation. The device is available in a 3-pin SOT-223 package for $0.49 each in 10,000-unit quantities. It is also available in 3-pin SOT-89 and SOT-23A packages, both for $0.43 each in 10,000-unit quantities.
Microchip Technology
Chandler, Ariz.


Dual-Phase PWM Controllers

International Rectifier's IR3622MPbF and IR3622AMPbF are dual-channel synchronous-buck control ICs with integrated high-performance drivers for medium- to high-current POL buck converters. The IR3622 family is well suited to multirail applications that require sophisticated power-up and power-down tracking, and sequencing of multiple rails.

The devices feature a programmable switching frequency up to 600 kHz. They also can be configured to support a single-output in current-share mode, capable of delivering up to 80 A, or to support two independent outputs. The IR3622MPbF targets 12-V single-input applications, while the IR3622AMPbF can support both 5-V and 12-V applications. Available in a 32-lead MLPQ package, the devices are priced at $1.90 each in 10,000-unit quantities.
International Rectifier
El Segundo, Calif.


Mixed-Signal Microcontroller

The MAXQ3100, from Maxim Integrated Products, is a highly integrated, mixed-signal microcontroller ideal for a wide range of data-driven display applications. The MAXQ3100 is designed for applications that require an RTC and an LCD controller; it includes a digitally trimmable RTC with a dedicated backup-battery pin, an LCD interface that supports up to 160 segments, a frequency-locked loop, two analog comparators and a digital temperature sensor.

The microcontroller has 16 kbytes of EEPROM program memory and 1 kbyte of data SRAM. The display controller supports LCDs with 160 segments. The MAXQ3100 is available in an 80-pin MQFP. Unit pricing starts at $3.19 for 1000 pieces.
Maxim Integrated Products
Sunnyvale, Calif.


Low-Voltage Boost Converter

Austriamicrosystems' AS1326 is a synchronous boost converter that operates at up to 96% efficiency from a voltage between 0.7 V and 5 V. The converter delivers 620 mA at 5 V from two AA cells or 470 mA at 3.3 V from a single AA cell. It also can provide adjustable output voltages in the range of 2.5 V to 5 V, or fixed at 3.3 V, while offering adjustable soft-start and current limit.

The 1-MHz constant-frequency switching can be synchronized to an external clock between 500 kHz and 1.2 MHz. The device is available in a 3-mm × 3-mm × 0.8-mm, 10-pin TDFN package.
Unterpremstaetten, Austria


Programmable Load

MTECH announces a family of air-cooled programmable power loads for testing advanced power systems. The PRL-150K 150-kW power load consists of 150 1-kW resistors mounted in a rectangular array (power-resistor block), which can accommodate several series/parallel combinations with minimum added inductance.

The resistors are mounted on a rigid frame with front and back access to resistor terminals. Interconnections are made manually by attaching standard bus bars. Each bus bar can carry up to 300 A. The load can be configured with individual resistors ranging from 0.25 Ω to 10 Ω. A variety of power levels is available. The load can be interfaced to several power cables (4/O is standard). The loads are also available in smaller arrays, such as 4 × 4 and 5 × 5.
MTECH Laboratories
Ballston Spa, N.Y.


PC-Board Connectors

Anderson Power Products' high-power pc-board connector and contact series may be preassembled in one- or two-row configurations, reducing assembly costs and eliminating accidental connector separation. Connectors and contacts are also available separately, allowing for customization of connector configurations.

When used with the APP Powerpole 15/45 fingerproof connector housings, the series provides a reliable and safe wire-to-pc-board connection. The connectors have a UL rating of 45 A per circuit and use contacts that are composed of copper alloy with tin plating. The connectors are available in many colors and with multiple accessories that include mounting wings, spacers and board-mounting staples.
Anderson Power Products
Sterling, Mass.


Medical Power Supplies

Excelsys' Xmite Series of medical-approved power supplies can be configured by users in a few minutes yet maintain all safety-agency approvals. The family consists of three powerPac chassis rated at 200 W, 400 W or 600 W, which may be populated with up to four powerMod output modules offering dc outputs ranging from 1.5 V to 58 V. The family supports the universal ac input range and includes active PFC. The family also features 90% efficiency and reduced thermal dissipation.

Measuring 10.54 in. × 3.5 in. × 1.59 in., the series is safety qualified to UL60601-1/EN60601-1 for medical applications. Standard pricing is $0.40/W for 1000 pieces.
Excelsys Technologies
Rockwall, Texas


MCU Evaluation Platform

Infineon Technologies' USCALE evaluation kit features the XC800 8-bit embedded-flash microcontroller (MCU) family. The kit is a USB stick that provides full evaluation capabilities for the XC866, XC886 and XC888 MCUs on a single platform. The USCALE kit offers access to the CAN, ADC, capture-compare unit, timers and vector computer for field-oriented control. It also provides access to the hardware signals of each of the three MCUs for extensive benchmarking and evaluation. The XC800 USCALE starter kit is available now. Pricing is 39 euros per piece.
Neubiberg, Germany


Tantalum Capacitors

Nichicon has extended the range of its low-profile F72 tantalum capacitor to include 1500-µF and 2200-µF, 6.3-V rated, 2-mm profile parts suitable for PCMCIA cards. In addition, the F72 series features smaller size, lower ESR, lower leakage current, better capacitance stability at various temperatures and longer life than competing products for PCMCIA applications. Samples of part numbers F720J158MXJAQ2 and F720J228MXJAQ2 are now available. Pricing is $1.95 and $2.55, respectively, in production volume.
Schaumburg, Ill.


Wide-Terminal Resistor

KOA Speer Electronics' WK73 wide-terminal flat-chip resistor provides high reliability and performance. Its wide-terminal construction gives the WK73 resistor good thermal-shock characteristics and high solder-joint reliability. The resistance range of the WK73 is 22 mΩ to 1 MΩ, with TCRs of ±100 ppm/°C, ±200 ppm/°C, ±300 ppm/°C and ±800 ppm/°C. The available tolerances are ±1% and ±5%, with a power rating at 70°C of 1 W or 1.5 W. Sizes for the series include 1020, 1218 and 1225. Small quantity pricing is $0.50 each.
KOA Speer Electronics
Bradford, Pa.


Motion Control Cards

The Prodigy motion control cards from Performance Motion Devices provide real-time, high-speed servo trace capture with 40 kbytes of onboard dual-port memory. Four motion variables can be stored at the same time. Each variable can be either 16 bits or 32 bits. Twenty-eight separate parameters can be selected for trace, such as position and velocity.

The cards can provide board-level, four-axis motion control for dc-brush, brushless-dc, stepping and microstepping motors. They are available in PCI and PC/104 configurations. Prodigy cards also provide advanced motion control, including trajectory generation and servo-loop closure. Prodigy-PCI and Prodigy-PC/104 are available now. Prices start at $380 each in OEM quantities.
Performance Motion Devices
Lincoln, Mass.


EMI-Filtered Terminal Blocks

Spectrum Control's EMI-filtered barrier-strip terminal block with pre-bent leads allows for easier installation on pc boards. The barrier-strip filtered-terminal block is designed to provide EMI/RFI filtering of ac and dc power and control lines, and is a cost-effective solution for backplane EMI leakage problems. This terminal block has a 20-A rating and capacitance values from 2500 pF to 5200 pF, and is available in terminal sizes two through six. Pricing is from $20 to $50 each, depending on configuration and quantity.
Spectrum Control
Fairview, Pa.


Thermoelectric Cooler

Nextreme's miniature thin-film embedded thermoelectric cooler (eTEC) features compact size, high power densities and microsecond response times. The device serves as a heat pump for thermal management, or a generator for converting waste heat to electricity. The device pumps a maximum heat flux of 150 W/cm2 with some designs delivering as much as 400 W/cm2.The eTEC operates according to the Peltier effect. To request an eTEC prototype, contact the company.
Research Triangle Park, N.C.


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