Power Electronics

New Products

Schottky Rectifier

The MBR60100CT is for secondary rectification of ac-dc and dc-dc converters, and freewheeling and polarity protection in power supplies. With 60-A forward current capability and a high 100-V reverse voltage, it is suitable for 100-W to 300-W power-supply applications. It has a very low typical forward voltage of 0.64 V, low maximum reverse leakage current of 20 mA and typical leakage current of 8.5 mA.
Vishay, Malvern, Pa.

Dual-Feed UPS

The new 5-, 7- and 11-kVA EX RT modules offer high-performance online operation with dual-feed ac input sources. At only 6-U when rack-mounted, users can quickly deploy the systems in a crowded rack. The UPSs feature a wide dynamic input voltage range enabling it to operate continuously through low line conditions without using battery power.
MGE, Costa Mesa, Calif.

Dual Amplifier

The PA60 dual-power operational amplifier provides two 1-A amplifiers on a single monolithic die. Its design provides a cost-effective board space-saving solution for applications where multiple amplifiers are needed in a bridge configuration. With a harmonic distortion of 0.02% THD and standby current of 8 mA, the PA60 is for low-power audio applications.
Apex Microtechnology Corp., Tucson, Ariz.

Dual Hot-Swap Controller

The LTC4221 dual hot-swap controller has a dual-level circuit breaker and can control a core supply voltage as low as 1 V. The dual-level circuit breaker offers an adjustable filter for moderate overcurrent faults and responds immediately to catastrophic faults. The 25-mV circuit breaker threshold minimizes the potential voltage drop for the core supply of the latest low-voltage processors.
Linear Technology Corp., Milpitas, Calif.

Bus Converters

The TPCMQ24 Series of dc-dc bus converters delivers up to 20.8 A at 48 V or 18.4 A at 54.4 V, yielding an output of 1000 W. They operate from an input of 20 V to 30 V (24 V nominal) with a conversion efficiency of 89% and a power density of 12.5 W/in3. Packaged in 1-U high enclosures, they mount in a hot-swap 19-in. shelf that accepts up to three converters for 3000 W of total output. For added power, multiple shelves can be paralleled.
Unipower Telecom, Coral Springs, Fla.

Half-brick DC Bus Converter

The BusQor HEA module delivers up to 360 W of isolated power for use in 12-V intermediate bus architectures. The wide input voltage range permits use in telecom applications requiring a standard 35-V to 75-V input. A patented regulation stage topology enables ultrahigh efficiency of 95% at full load while maintaining tight output regulation across a wide input range.
SynQor Inc., Boxborough, Mass.


These PoE DIMMs for implementing eight to 48 ports in IP phone systems, switches and blades fit vertically on a PCB in a 1-U rack, reducing the board area required to implement by more than 50% compared to competitive solutions. Each port on the DIMMs features internal current monitoring, a limited current source and an overload and disconnect detection sensor, all in compliance with IEEE802.3af.
Phihong, Fremont, Calif.

DC-DC Converters

The APA18 Series of 75-W SIP footprint POL dc-dc converters feature efficiencies as high as 92%. With input voltage ranging from 10 V to 14 V, they deliver 18 A with adjustable output voltages from 0.75 V to 5.5 V. Measuring 2 in. × 0.5 in. × 0.4 in., their wide operating temperature range of 40°C to 85°C and MTBF in excess of 1 million hr make them suitable for use in extreme environments.
Emerson Network Power, Carlsbad, Calif.

Reference Design

The IRISMPS4 is a reference design for flyback topology ac-dc power supply circuits found in DVD/CD players, set-top boxes and an array of consumer electronics. Using IR's IRIS4009 ac-dc integrated switcher as the main switch and control device, the IRISMPS4 features a universal ac line input and 15-V, 4-A full load dc output. The IRIS4009 is ideal for universal and single-input ac-dc power supplies and adaptors for consumer electronics.
International Rectifier, El Segundo, Calif.

Point-of-Load Converters

JAZ15 nonisolated POL converters can be programmed with external resistors to deliver tightly regulated outputs from 0.9 V to 3.36 V at up to 15 A, allowing customers to use the same converter for multiple applications on a board. They accept input voltages from 3 Vdc to 5.5 Vdc and come in SIP or SMT packages. Offering fixed outputs from 1 V to 3.3 V, the JAZ10 family offers similar characteristics to the JAZ15 but with 10 A maximum output and up to 95% efficiency.
XPiQ Inc., Holliston, Mass.

Bus Converter

QuattroVerter QVB modules are high-efficiency, constant-frequency, isolated low-noise converters that provide excellent transient response. They also include positive and negative on/off logic options, input under-voltage and input overvoltage protection. Key features include output short circuit, output overload, output overvoltage as well as overtem-perature protection.
RO Associates Inc., Sunnyvale, Calif.

Hipot Testers

The Hipot Tester Models H111 and H216 are bench top safety testers designed for production and lab testing. They permit tests to UL, CSA and IEC standards. They can be used for ac and dc withstanding voltage tests up to 6 kV on various electrical equipment and components. Up to 10 different tests/programs each containing up to 16 steps can be stored and initiated at the touch of a button.
AEMC, Foxborough, Mass.

Boost Converter

The LT1935 is a 2-A, 40-V,1.2-MHz step-up dc-dc converter in a ThinSOT package. Its 2.3-V to 16-V input voltage range lets it operate from single cell Li-Ion batteries up to fixed 15-V input rails, delivering outputs up to 38 V. Its constant 1.2-MHz switching frequency keeps switching noise out of noise-sensitive circuitry and enables the use of tiny capacitors and inductors.
Linear Technology Corp., Milpitas, Calif.

Inverter/Driver IC

The FAN7310 is a full-bridge inverter/driver IC that integrates a pulse width modulation (PWM) controller in a 20-SSOP package. It offers an efficient low-part-count solution for portable LCD backlighting applications. It supports analog, mixed and burst-dimming modes of operation; has a wide input range (5 V to 24 V); and offers a variety of circuit protection features for further reliability.
Fairchild Semiconductor San Jose, Calif.

DC-DC Converters

This updated 150-W dc-dc converter series contains 12 single and 12 dual-output models. They accept 12-Vdc, 24-Vdc or 48-Vdc input and produce a regulated 12-Vdc, 15-Vdc, 48-Vdc or 75-Vdc output with an adjustable range of ±5%. They also offer up to 92% efficiency, 1500-Vdc input-to-output isolation, 2-to-1 input voltage range, and input undervoltage protection.
Beta Dyne Inc., Bridgewater, Mass.

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