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December, 2015 Low Airflow Power Supplies from Powerbox
Gnesta, Sweden —In medical applications, reducing the level of noise and other parasitic disturbances is important for keeping patients comfortable. When designing equipment, engineers are often required to develop products that operate by free air convec- tion, which limits forced ventilation to peak demand. The power supply in a piece of equipment must con- tinue to deliver reliably in these situations. The OBM03 and OBP03 power supplies have been designed to meet these conditions. Combining a layout to facilitate natural air
convection cooling and efficient switching topology, these supplies are made to provide continuous power operation of 100 and 200W. When extra power is required, with limited forced air, the available power increases to 150W at only 7.5CFM for the OBM03 and to 300W at 10CFM for the OBP03. Designed for medical BF applications, these supplies withstand an input-to-output isolation of
4000VAC, input-to-ground of 1500VAC and out- put-to-ground of 1500VAC. At 264VAC, the leak- age current is below 175µA for the OBM03 and below 220µA for the OBP03. In medical environments, parasitic noise can
impact sensitive equipment, which requires extreme attention paid to conducted and emitted radiations. These supplies have a built-in filter and loop-less layout which are EMC IEC60601-1-2 and ITE com- pliant. They are also EN55011/EN55022 class B con- ducted and radiated. With a nominal input voltage of 100-240V at
50/60Hz, seven available output voltages spanning 12-48VDC, a typical power factor of 0.98, and an operating temperature window of 0 to 70°C (32 to 158°F), these power supplies fit into a large num- ber of medical applications. Other notable features include over-voltage
Open frame power supply.
and over-current protection, no-load power of less than 1W, 92 percent efficiency (89 percent for the OBM03), 250,000h MTBF per MIL-HDBK-217F, and a separate isolated 12VDC output for fan power. The OBM03 is packaged in an open frame, while the OBP03 is in a low-profile open frame. In addition to the frame configuration, the OBP03 is avail- able with an L-bracket and a full enclosure with an integrated fan. It also includes an inhibit function. The power supplies meet safety standards UL ES and CSA 60601-1 and 60950-1, as well as complying
with RoHS. Contact: Powerbox, 1 Tara Blvd
#200, Nashua, NH 03062 % 603-324-7195
E-mail:
marcom@prbx.com Web:
www.prbx.com
20W DC/DC Converters from Minmax
Hudson, MA — Minmax Power has introduced its MOW120C series, a family of regulated, fully-encapsulat- ed DC/DC converters with a wide 4:1 input voltage range, extended oper- ating temperature range of –40 to +90°C (–40 to +194°F), and easy mounting configurations for either chassis or DIN rail mounting. According to the company, the
moun ting configurations, along with EMC compliance with EN61000 Immunity Standards, make this
DC/DC Converters for industrial applications.
series a good choice for industrial applications. Additional features of the con-
verter include an LED output indica- tor, remote on and off, input filtering to EN55022 and FCC Class A, and Safety Certification to UL/cUL/IEC/ EN60950-1. These converters use high-qual-
ity, 100 percent RoHS compliant materials and are manufactured to a rigorous ISO9001 quality control pro- gram to ensure product reliability,
backed by a three-year warranty. Contact: Minmax Power, Inc.,
43 Broad Street, Hudson, MA 01749 % 978-567-9635 fax: 978-567-9601
E-mail:
sales@minmaxpower.com Web:
www.minmaxpower.com
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