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Low-Cost AC-DC Power Supplies Target High-Performance Applications
The six ac-dc power supplies in the single-output, 3-W switching MPM-03S series from MicroPower Direct include a universal ac input, full safety approvals, robust filtering, and a miniature dual-inline package (DIP). They operate from a universal input of 85 to 264 V ac and provide tightly regulated single outputs of 3.3, 5, 9, 12, 15, or 24 V dc.
Powerline Communication Standards Continue To Struggle
Powerline networking puts OFDM on the ac powerline for high-speed data transfers over the installed power wiring. There are no new wires. The standard ac outlets are your network connections. That has to be as convenient as wireless, since every room or area in your home probably has multiple ac outlets. Yet the powerline networking segment of home networking is in a muddle and not doing as well as it could.
Green Forum Explores Use Of DC Power In Buildings
A workshop titled “EPRI/LBNL DC Power Partners Workshop,” was added to the First Annual Green Building Power Forum (GBPF ’09) being held June 1-3 in Anaheim, Calif. This particular workshop will identify the current status and future plans for the development of dc power distribution including: business case considerations, safety factors, quantification of the energy savings and reliability benefits, and standardization issues.
Boost Regulator Provides Cost-Effective Power Solution For LCDs
The MAX17075 boost regulator from Maxim Integrated Products includes charge pumps, switch control, and a high-current operational amplifier. Developed using the company’s proprietary high-voltage process technology, it integrates all the functions required to power the source drivers, gate drivers, and VCOM backplane in LCDs. This step-up dc-dc converter also includes a switch for gate-driver-supply modulation.
94% Efficient Power Block Targets FPGAs And Processors
Designed to meet the demanding requirements of applications with multiple power rails where cost, efficiency, and flexibility are mandatory, the ROA1283003 30-A power block from Ericsson targets FPGAs and other processors. Its Centralized Control Architecture (CCA) is based on a centralized power-management controller that can drive single or multiple power-block switching modules.
Lightning And Surge Protectors Suit Telecom Equipment
L-com has added two lightning and surge protectors for telecommunications equipment to its line of products. The HGLN-CAT5J is fully compatible with industry-standard 802.3af Power-over-Ethernet (PoE) devices and 10/100 BaseT Ethernet networks, protecting both Ethernet data pairs as well as the PoE dc power feed. The AL-D4W-DP protects DSL and telephone lines from transients or surges caused by lightning strikes.
High-Voltage Rectifier Reduces Footprint In Power-Supply Applications
The SBR10U200P5 Super Barrier Rectifier (SBR) from Diodes Inc. improves compact power-supply functionality and performance in notebook power adapters, universal chargers, telecom power supplies, and similar products, the company says. It comes in a compact, thermally efficient, proprietary PowerDI5 package that enables it to serve as an output diode in power-supply output stages, a catch diode in buck regulator circuits, a freewheeling diode in motor drive circuits, and a boost diode.
European Power Developments Defy Global Downturn
The tight economy is applying pressure on designers with tighter power requirements. A smaller power footprint can go a long way in increasing revenue—both for customers and for the designers themselves. These efforts in eliminating waste are finding results in set-top boxes, organic photovoltaic (PV) devices, and TVS diodes.
25- And 35-W Power Supplies Provide Range Of Output Voltages
The 25-W LS25 and 35-W LS35 ac-dc single-output power supplies from TDK-Lambda provide 3.3-, 5-, 12-, 15-, 24-, 36-, and 48-V dc output voltages. They also operate with a universal ac input of 88 to 264 V ac (47 to 63 Hz) and can withstand input surges of up to 300 V ac. These enclosed devices carry the CE Mark and are certified to UL/EN/IEC60950-1 safety agency standards as well.
Low-Cost Power Supplies Squeeze Into 1U Space
The VCT60 series of 60-W ac-dc power supplies from XP Power fit into a standard 1U space, measuring 2 by 4 by 0.95 in., targeting applications requiring an economical power supply that fits into an industry-standard 2- by 4-in footprint. The first product in this open-frame family comprises 10 single-output models that provide popular nominal output voltages from +5 to +30 V dc.
60-V Step-Down Controller Offers 150°C Maximum Junction Temperature
The H-grade version of the LTC3824 step-down dc-dc controller from Linear Technology offers a low quiescent current in a small, thermally enhanced MSOP-10 package. Its –40°C to 150°C operating junction temperature range is guaranteed, suiting automotive and industrial applications subjected to high ambient temperatures and demanding a small solution for output voltages ranging from 0.8 V to VIN at up to 5 A.
DC-DC Footprints On The Sands Of Time
The footprint of a dc-dc converter is, to me, an interesting topic. There is a certain amount of history to it that’s kind of fascinating. Also, it really plays heavily into the decisions power designers make about what solution they’re going to use and whether, for example, another vendor is actually a true second source. Over time, the dc-dc converter footprint has, in general, experienced some changes. You might also say it has changed the industry to some degree.
Reference Design Meets Latest Energy Star Standby Power Spec
The RDK-203 reference design kit from Power Integrations includes a dual-rail power supply with high loop bandwidth and peak power for home systems and a 650-W audio power rating. According to the company, it enables developers to easily meet new and emerging standby power usage regulations for consumer audio-video equipment.
Single Chip Integrates LED Driver And Controller
The PowerPSoC family of integrated embedded power controllers from Cypress Semiconductor represents the industry’s first single-chip solution for controlling and driving high-power LEDs, according to the company. The devices integrate four constant-current regulators and four 32-V MOSFETs with the Cypress PSoC programmable system-on-a-chip, which includes a microcontroller, programmable analog and digital blocks, and memory.
dsPIC Controllers Take On Heavy-Duty SMPS Control Roles
Digital power continues to move deeper into the mainstream. Last month, Microchip Technology introduced seven PIC microcontrollers customized for switch-mode power supply (SMPS) applications. Microchip has offered SMPS controller chips before, but the new, in-circuit programmable, 16-bit dsPIC digital signal controllers (DSCs) are smaller and offer twice the performance (40 MIPS) at a lower price than the old SMPS family.
Tiny POL Converters Deliver High Power Densities
FDK Corp. has added five products to its DK series of non-isolated point-of-load (POL) dc-dc converters. These devices deliver up to 6 A of output current at power densities up to 860 W/cubic inch in an SMD package and up to 4 A of output current at power densities up to 760 W/cubic inch in a SIP. Under natural convection, they also deliver the full rated output current with no derating in ambient temperatures up to 85°C in the SMD package and up to 70°C in the SIP.
Low-Noise Step-Up Converter Pumps Out 600 mW
The MAX15032 step-up converter from Maxim Integrated Products integrates a high-voltage DMOS power switch that enables it to boost output voltage up to 36 V and deliver 600 mW (max). Designed to provide a compact solution for locally generating a low-noise, high-voltage output in low-voltage systems, it employs an internal charge-pump circuit to enable low-voltage operation from 2.7 to 11 V.
Reference Design Simplifies DC-DC Conversion
The RD278 synchronous buck regulator reference design from Fairchild Semiconductor makes it easier for designers of telecom, servers, set-top boxes, and other consumer applications to develop a more efficient and compact solution, according to the company.
It features the FAN21SV06, a single-supply, highly integrated 6-A synchronous buck solution that enables designers to reach high levels of efficiency in less space, Fairchild says.
6-W LED Driver Integrates DC-DC Boost Converter
The CAT4106 LED driver from On Semiconductor includes an integrated, high-power dc-dc boost converter and on-chip diagnostics to maximize efficiency in larger, general-purpose LCD panel backlighting applications. This multi-channel boost device can drive as many as 40 white LEDs, or four strings of 10 LEDs with up to 36 V per string, for a total of 6 W of LED output power.
Solar Energy Harvesting Module Drops Into Portable Applications
The EnerChip EH CBC5300 energy harvesting module from Cymbet Corp. can be paired with small photovoltaic cells to power devices using ambient solar energy harvesting. It provides energy conversion, energy storage, and power management in a single package using new high-efficiency energy-conversion techniques and energy-aware functions.
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