Buyers can expect stable pricing for AC/DC power supplies heading into the fourth quarter of 2014. Although lead times are stable, deliveries range from six to 24 weeks, according to the latest Avnet Market & Technology Trends report. As demand grows across several market segments, buyers can expect power supply manufacturers to focus on developing new products or enhancing existing lines with increased densities, smaller packaging, wider input voltage ranges and higher temperature ranges.
The global market for AC/DC and DC/DC power supplies is expected to grow 4.6 percent in 2014, reaching $21.6 billion in 2014, according to IHS Technology. The market is expected to continue to strengthen over the next few years, reaching $25.1 billion in 2018.
“The markets for most applications that use a power supply are now growing again after a couple of gloomy years, with emerging applications such as power supplies for light-emitting diode (LED) lighting and media tablets leading the way,” said Jonathon Eykyn, power supply and storage component analyst for IHS, in a statement. “Demand for power supplies for these two applications alone is projected to grow by more than $2.5 billion from 2014 to 2018, but other power supply markets—such as telecommunications, data communications and industrial—are also projected to provide growth opportunities to power supply vendors in the coming years.”
With big growth drivers in emerging markets such as LED lighting and tablets, buyers can expect new product developments focused on these areas. However, growing demand for energy efficiency across all industries, including industrial and medical segments, will also drive improvements in efficiency and power consumption.
One example is the VOF series from CUI Inc. Touting improved no-load performance, higher efficiencies, and higher power, CUI Inc. (Tualatin, Ore.) has expanded its VOF series of compact, open frame AC/DC power supplies with new 100-, 120-, and 150-watt (W) versions. The new single-output supplies are higher power additions to the recently released second generation of open-frame power supplies. The VOF series feature efficiencies up to 90 percent and no-load power consumption as low as 0.25 W.
These VOF series supplies can accommodate a wide universal input voltage of 90~277 Vac at 47-63 Hz input, ensuring global compatibility for a variety of applications including ITE, industrial and consumer electronics. They offer output voltage options of 5, 12, 15, 24, 36 and 48 Vdc depending on the series. All models include output voltage adjustability of +/-5% via an onboard potentiometer.
The VOF-100 is rated for operation at 100% load with 6.7 CFM of forced air cooling from -20°C to 50°C, derating to 50% load at 60°C. VOF-120 and VOF-150 models operate under convection cooling conditions at 100% load from -20°C to 40°C, also derating to 50% load at 60°C. They feature protection for over-voltage, over-current, and short circuit conditions as well as primary-to-secondary isolation voltage of 3 K Vac.
All VOF Series models are packaged in industry standard footprints. The 100-W VOF series measures 01.6- x 50.75- x 33.6-mm (4.00 x 2.00 x 1.32 inches), while the 120-W and 150-W VOF models measure 127- x 76.2- x 33.1-mm (5.00 x 3.00 x 1.32 inches). They also carry UL/cUL and TUV 60950-1 safety certifications and are qualified for the CE mark, EN 55022 Class B, and FCC Class B EMI standards. Prices start at $36.28 each in quantities of 100 pieces through the company’s distribution channel. Lead times is eight to ten weeks.
Also beefing up its AC/DC power supply offering in the higher power range is XP Power (Sunnyvale, Calif.). XP extended its GCS series of open-frame AC/DC power supplies up to 250 watts. These high efficiency, single-output AC/DC power supplies are certified to both industrial and medical international safety standards. The series is now comprised of 150-, 180-, and 250-watt (W) models in a variety of mechanical formats. The power supplies are available in an industry standard 3 x 5 inch (127 x 76.2 mm) open frame package, an enclosed covered version, and top or end-mounted fan cover options. The open frame format allows the GCS250 to deliver up to 180 W by convection cooling, and the full 250 W when provided with only a 7 CFM airflow or when using the optional fan mounted configurations, said XP Power.
The GCS series power supplies typically provide up to 93 percent efficiency and are available with outputs covering all the popular nominal voltages from +12 to +48 Vdc. A secondary 12 Vdc / 0.6 A fan supply is also a standard feature, with a remote on/off option.
The GCS250 can operate over the extended temperature range of – 40 to + 70 degrees C with no derating until +50 degrees C. The supplies operate from a wide input range of 85-264 Vac, with full power available from 90 Vac and higher. The GCS series meets Class B conducted and Class A radiated criteria as stipulated by EN55011 and EN55022 and do not require additional EMC filtering components. The supplies come with a three-year warranty. The GCS250 series is priced at $81.90 for 500-piece orders and is available from Newark element14, Digi-Key, or direct from XP Power.
In the lower power segment, one new example is XP Power’s ECE60 series of single-output encapsulated 60-W AC/DC power supplies. This product touts a slim profile, high-power-density, and low no-load power consumption. It’s available in several configurations including PCB mount, chassis mounted with screw terminals, or in a DIN rail mount configuration.
XP Power claims the new series offers the smallest footprint and the highest power density of any 60-W power supply in the industry. The power supply model measures 3.6 x 1.5 x 1.1 inches (91.4 x 38.1 x 28.0 mm) and offers a power density of >10 W per cubic inch. With the no load power consumption of less than < 0.3 W and a high efficiency up to 89 percent the ECE60 series also ensures that end products meet the criteria of “green” energy saving initiatives. In addition, the ECE60 meets EMC specification EN55022 for class B conducted and radiated emissions without the need for any additional filtering components. They come with a three-year warranty. The ECE60 series is priced at $58.80 for 500-piece orders and is available from Newark, Digi-Key, or direct from XP Power.
Another new lower power AC/DC power supply is the MB65S medical-grade power supply from SL Power Electronics (Ventura, Calif.). The 65 W, single-output, convection-cooled AC/DC power supply family is designed to meet the new safety standards of IEC 60601-1-2 fourth edition EMC requirements and supports home health-care applications with Class B EMI and Class I & II Wide Range AC Input.
The new models are specifically designed for next-generation medical equipment including patient monitoring, surgical, imaging, home health-care devices and laboratory equipment that demand a higher level of EMC, EMI, and AC input performance. They are approved to AAMI ES/CSA C22.2/EN/IEC60601-1, third edition with 2x Means of Patient Protection (MOPP) and can be used for type BF isolation applications. In addition, the MB65S comes in a small form factor, measuring 2- x 3.5- x 1.3-inches, making them suitable for portable applications.
The MB65S models feature a universal AC input of 85 to 264 Vac and a DC output range from 12V to 48V. The family is available in Class I or Class II input configurations, and feature input/output and temperature monitoring/alarms as well as self-protection against short circuit, overload and over-temperature conditions. The operating temperature range is -20°C to 70°C with start-up at -40°C. Touting less than 0.5 W of no-load power consumption, the power supply will not drain the host system batteries when in idle or quiescent mode, said the company.
The MB65S Medical Series offers eight standard models and comes with a three-year warranty. The RoHS-compliant power supplies meet EMC requirements for applications requiring Class B conducted and Class B radiated EMI performance. The models are rated at 560,000 hours of calculated mean time between failure (MTBF). Models are fully approved by the IEC60601-2, 3rd edition safety standard and carry cUL, CAN/CSA, and DEMKO approval markings. OEM pricing for the power supplies starts at $35.00 each for 500-piece orders. The supplies are available through the company’s distribution sales channels.
Expanding its AC/DC single-output power supply family in the low-power range, TDK-Lambda has added a 50-W power model to its RWS-B series of four existing power levels between 100 W and 600 W. These devices are suited for low-power applications including general industrial, automation, broadcast, test and measurement, and LED signage. The power supplies operate from a universal input of 85 – 265 Vac (47 – 63Hz). The company said the RWS50B power supply achieves exceptional thermal performance for cooler operation over its operating range of -10 to +70°C.
The RWS-B series offers standard output voltages range from 5 to 48 Vdc, delivering currents up to 10 A with typical efficiency up to 88 percent. To accommodate non-standard system voltages, the RWS-B series is user adjustable by -10/+15% (+10% for the 48-V model), said TDK-Lambda. Standard features include over-current protection with automatic recovery and latching over-voltage protection. All models feature a 10-year e-cap lifetime (or greater under typical operating conditions) and come with a five-year warranty. Click here for TDK-Lambda’s global distribution network.
CE marked, according to the Low Voltage and RoHS2 Directives, the convection-cooled 50-W power supply achieves curve B conducted and radiated EMI performance (EN55011/EN55022-B, FCC class B, VCCI-B) and is approved to a wide range of safety standards including UL/ CSA/EN60950-1.
The industry will continue to see new power-supply designs in both higher and lower power versions to meet growing demand across a variety of industries from industrial and medical applications to mobile devices. Most of these offerings will be available through the global distribution channel.