New Industry Products

Marotta Controls Fully Qualifies and Releases Fourth 1-STEP Power Converter

March 05, 2021 by Hailey Stewart

This switch-mode power supply (SMPS) offers 11,200 Watts of fully isolated output power with 91 percent efficiency at full load.

Marotta Controls, a rapidly growing aerospace and defense supplier based in New Jersey, today announced the availability and final qualification of the PS11200—the fourth variant in the 1-STEP product line. This switch-mode power supply (SMPS) offers 11,200 Watts of fully isolated output power with 91 percent efficiency at full load. It is designed to replace legacy 400 amp solutions that generally produce unregulated or loosely regulated power in a larger footprint.


Image courtesy of Moratta
Image courtesy of Moratta


Marotta also confirmed today that the PS11200 has passed all necessary qualification tests to ensure the power converter’s reliability and performance within rugged environments commonly presented by heavy-lift military/defense aircraft such as C-130 Hercules cargo planes and CH-47 Chinook transport helicopters as well as unmanned aerial vehicles.

Historically, multiple steps are required to convert 3-phase AC input power to an isolated and regulated DC output with power factor correction. Each conversion step adds its own complexity and components, contributing to loss of efficiency as well as bulk. In turn, designers ultimately make difficult trade-offs in size, weight, power and cost (SWaP-C) outcomes. Marotta developed the patented 1-STEP AC-DC conversion solution to minimize those compromises.

A 1-STEP converter is an innovative circuit solution that achieves active power factor correction (APFC), output voltage regulation, and electrical isolation in a single conversion step. Delivered in a compact light-weight package that can be up to 30 percent lighter than competitive offerings, it meets key military and commercial avionic standards while delivering increased efficiency and power density.

“We first launched the 1-STEP product family in 2016,” said Michael Germinario, Senior Technical Director – Business Development, Marotta Controls. “A wide range of aerospace, ground and marine systems and equipment require regulated DC power. But solutions to date have been cumbersome and costly. Customers turned to us for an alternative, which resulted in a 3-phase solution that delivers unparalleled power density in a simplified design capable of supporting a wide range of output power. The PS11200 now brings that tech innovation to heavier load power conversion applications.”


Key PS11200 Specifications

Key PS11200 Environmental Qualifications:

Key PS11200 Electrical Qualifications:

Input Voltage: 3-phase 115 VAC

Operating Temperature: -51°C – 71°C

EMI/EMC: procedures for fixed wing Navy/Air Force aircraft, conducted and radiated emissions

Input Frequency: 50 – 800 Hz

Altitude: +35,000 feet MSL

Power Quality: per MIn the PS11200,

Output Voltage: 28 VDC ± 1%

Vibration: 5.4 Grms, 20 – 2,000 Hz, with 81 Hz harmonic peaks  

Power Factor Correction: > 0.95 at half to full load

Shock: 20 g, 11 ms


Power Quality: MIL-STD-704A-F

Humidity: 100%


Weight: 34 lb

Acceleration: 6.5 G


Sand and Dust: MIL-STD-810F, method 501.4, procedure (blowing dust)



For more information on the PS11200, download the datasheet and the 1-STEP Technical Paper for an overview of the unique power converter design.

1-STEP Product Family

Other currently available 1-STEP power converters, all with regulated and isolated outputs, include:

  • PS1500: 1,500 W, 270 VDC, 2.4 lbs
  • PS2600: 2,600 W, 270 VDC, 4.4 lbs
  • PS3500: 3,500 W, 28 VDC, 15.2 lbs


About Marotta Controls

Founded in 1943, Marotta Controls is a fully-integrated solutions provider which designs, develops, qualifies and manufactures innovative systems and sub-systems for the aerospace and defense sectors. Our portfolio includes pressure, power, motion, fluid, and electronic controls for tactical systems, shipboard and sub-sea applications, satellites, launch vehicles, and aircraft systems. With over 200 patents, Marotta Controls continues to build on its legacy as a highly respected, family-owned small business based in the state of New Jersey. Twitter: @marottacontrols LinkedIn: Marotta Controls, Inc.