SITAEL offers a wide range of low voltage power supplies with outputs from 1.5 V up to 120 V, designed to supply Optical Payloads (CCD), RF Payloads (SAR, SRAL) and Data Systems (PDHU, MMU).
In the frame of a contract with Thales Alenia Space FR, SITAEL developed the DC/DC Converter for the SRAL-C Ku (SAR Radar and ALtimeter) Radio Frequency Unity (RFU) on board of the Sentinel 3 satellite. The DC/DC Converter delivers 6 output voltages to the RFU: 5V and +6V regulated rails and +6.2V, -6V, -40V and +30V not regulated. It will implement latching output overload and short circuit protections, providing input current monitor and temperature telemetry too.
The SAR Transmit Gain Unit is a core subsystem on board of the Sentinel 1 satellite, launched on April 4th 2014, and is composed by an ASIC monitor/control circuit and an RF Pulsed Power Amplifier. In the frame of a contract with Astrium UK, carried out with funding by ESA and the European Union, SITAEL developed the DC/DC Converter that supplies all the voltages to the subsystem.
The PDHU Power Supply Board has been developed in the frame of a contract with SYDERAL, in charge of the PDHU of the GAIA mission, in orbit since December 19th 2013. The Power Supply Board (PSB) accommodates two DC/DC converters supplied by two independent input power buses, one for the Controller Boards and the other for the Mass Memory Boards.
The MMFU Power Supply Board has been developed in the frame of a contract with SYDERAL, in charge of the MMFU of the EarthCARE mission. Two identical Power Supply Module (PSM), running in cold or in hot redundancy, interfaces the 28V Input Power Bus and generates all the secondary voltages required by the MMFU.
In the frame of a contract with COMDEV Canada, SITAEL developed the High and Low Voltage Power Supplies for the Suprathermal Ion Imager of the Canadian Electric Field Instrument aboard the SWARM constellation of satellites.
In the frame of the Cosmo Skymed 2nd Genration Programme, under a contract with SELEX ES, SITAEL is developing the Converter (CVT) Module of the Control Moment Gyro Assembly (CMGA) Control Unit (CU). The module is composed by two DC/DC converters, a DC/DC converter used to provide 75V to two brushless motors and an auxiliary DC/DC converter designed to provide the power lines to control electronics (+12V, -12V, +5V, +3.3V, -15V) and to the motor sensors (+15V, -15V, +5.3V).
In the frame of a contract with SELEX ES, SITAEL developmed the Elegant Breadboard of a high efficiency DC/DC converter able to generate 28V power bus from 120V input bus voltage for the PCDU of NASA Multi Purpose Crew Vehicle (MPCV) Service Module.
In small satellites, the use of centralized services is usually identified as a potential mass saver. Due to the common need of power conditioning for each Payload, the concept of a Centralized Power Supply is an important step towards compactness. For this purpose, a Central Payload Power Supply (CPPS) has been specifically designed to power Highly Integrated Payload Suites on future small satellites missions where reduced mass, size and power consumption are key factors.
SITAEL was the prime contractor in the Italian Space Agency (ASI) SAMPIF project, devoted to the development of a Focal Planes (CCD) Multi-Output Low Power supplies. SAMPIF generates five (5V, ±15V, ± 33V) output voltages from a not regulated input bus (24V ÷ 50V).