Powerbox 1200W power supply with adjustable “near-zero” output voltage and current for applications with conduction cooling

Charlie Taylor

Powerbox, one of Europe’s largest power supply companies and for more than four decades a leader in optimized power supply solutions for demanding applications, launches OFI1200A, a new 1200W AC / DC power supply for industrial applications. OFI1200A is optimized for conduction cooling and provides full performance without a cooling fan at temperatures on the base plate from -40 to + 95 ° C. The voltage range is universal from 85 to 305VAC with PFC (power factor correction). Adapted for a wide range of applications, the unit’s output voltage and current can be adjusted from close to zero to the maximum for each version.Published: March 29, 2022, 13:00A number of industrial applications need power units that can work with very limited or no ventilation for cooling. It can be equipment in harsh environments with electronics installed in closed enclosures, radio communication systems exposed to harsh weather, displays and traffic signaling outdoors, or when operating indoors with requirements for very low noise levels. In addition to environmental aspects, reliability and maintenance costs are factors that motivate system designers to avoid fans. Conduction cooling places very specific demands on the construction of a unit. PRBX OFI1200A is designed for optimal heat transfer from the heat-emitting components to the base plate, which enables full performance from -40 to + 95 ° C on the base plate. Depending on the structure of the application and overall cooling conditions, derating can be applied in accordance with what is stated in the technical documentation. To cover a wide range of applications, the OFI1200A has the universal voltage range 85 to 305VAC (nominal 100 to 277VAC). The unit has PFC with the coefficient 0.98 / 0.95 (110VAC / 230VAC). OFI1200A is available in three variants with simple DC output, 12V / 84A; 28V / 43A and 48V / 25A. With its energy-efficient topology, the unit, in the variant with 48V output voltage, has a typical efficiency of an excellent 92% at 230VAC input voltage. For industrial applications such as professional lighting or low-power electrolysis equipment, the power supply needs to supply a constant and easily adjustable current. Such equipment is often used in environments where the electronics must be closed and protected from various stresses. The power units must therefore offer external control of output voltage and / or current from maximum to close to zero. To be able to adjust voltage and current exactly to the needs of the application, OFI1200A has two analog inputs, VTRM and ITRM. With these, the output voltage and current can be adjusted from near-zero up to the maximum for each version. As an example, the version with 28V output can be adjusted from near zero volts up to 33.6V, and the output current from near zero amperes up to 43A. The output voltage can also be adjusted with the potentiometer on the unit. The extended control and trimming function simplifies the use of the unit in CV (constant voltage) or CC (constant current) mode without the addition of any external circuits. For applications with a need for redundancy or higher power, up to nine units can be connected in parallel, for an impressive total output power of 9720W during conduction cooling. For the highest possible efficiency for parallel or redundancy operation, there is an option (option-O) with active ORing circuit with high-performance FET technology for OFI1200A28 and OFI1200A48. For high safety, OFI1200A has IN / OUT insulation of 3000VAC and IN / FG (floating ground) of 2000VAC. The insulation from output to FG is 500VAC. The power supply has overcurrent protection with automatic reset, overvoltage and overtemperature protection. Connectors on the circuit board in OFI1200A provide easy access to extra functions such as; Remote control, voltage detection, Power Good, VTRM and ITRM. OFI1200A has undergone shock and vibration testing according to MIL-STD-810H. The product has been tested to levels well above normal operating conditions and is specified to withstand shocks of 20G. In the open frame version, the OFI1200A has the dimensions 142 x 39 x 260mm (5.59 x 1.54 x 10.36 ”) and weighs a maximum of 1.2 kg. As an option, there is a metal housing that increases the height by only 1mm and the weight by 200 grams (Option N). Optimized for conduction cooling from the beginning, the OFI1200A is an excellent choice for applications that require a quiet power supply solution such as in control room. It is also excellent in industrial applications where forced cooling is not possible due to environmental constraints. Mounted on a chassis or a cooling plate, the OFI1200A delivers impressive power with very high reliability. OFI1200A is certified according to UL62368-1 third edition, C-UL (corresponds to CAN / CSA-C22.2 No.62368-1). The OFI1200A series has a three-year full warranty and complies with the European RoHS, REACH and low voltage directives. The product is CE, UKCA and cURus marked.Current links:
https://www.prbx.com/product/ofi1200a/For more information
Visit www.prbx.com
Contact Patrick Le Fèvre, Chief Marketing and Communications Officer
+46 (0) 158 703 00
[email protected] The following attachments are available for download:
PRBX_OFI1200A_PR_EN_220329See full press release and other news from this company on Cision News.
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