VECTRONIC Aerospace offers with the VPCDU a highly integrated device to control the power supply of the subsystems of a small satellite. The VPCDU incorporates interfaces to solar arrays and batteries, power outlets to the satellites subsystems, functionalities for separation detection micro switches, under voltage lookout, battery handling and power conditioning. The power outlets to the satellite’s subsystems are equipped with resettable electronic fuses to prevent the system from damage in case of an overload or malfunction of external devices. Most of the internal functions are controlled by a micro processor unit in redundant configuration.


  • 3 independent interfaces to solar arrays with wide input voltage range up to 60 V
  • 1 auxiliary power supply interface for operation of the device in a laboratory
  • 3 independent battery charge regulation channel with adjustable charge voltage
  • Battery under voltage detection and battery end of discharge protection
  • Over and under voltage protection circuit
  • 2 cross-coupled full duplex RS422 interface for common commands with adjustable rate up to 460800 bps
  • 2 not cross-coupled full duplex RS422 interface for High Priority Commands with adjustable rate up to 460800 bps
  • 48 analogue inputs with adjustable gain
  • 7 digital inputs for open collector circuitries
  • 27 resettable fuses
  • 52 high side power switches
  • 2 bistable relays
  • Precise measurement of external and internal sensor currents and voltages (e.g. sun sensors, temperature sensors, analogue voltages)
  • Internal operation scheduler and mode controller
  • Time and function based autonomous redundancy control
  • CAN bus technology is optionally available


Dimensions 220 mm x 160 mm x 117.4 mm
Mass 4.14 kg
Mounting pattern 6 x M5
Standby Power consumption @25V

Auxiliary Supply

2.5 W (typical)
Solar arrays input voltage range 22.5 V to 60 V
Battery input voltage range 22.5 V to 36 V
Max. power input range (overall) 360 W
Max. power output range (overall) 540 W
Signal interface RS422 / RS485 / CAN
Signal characteristics Serial async. / CAN
Connector Type SUB D & SUB HD
Operating temp.range -20°C to + 70°C
Storage temp. range -40°C to + 80°C
Vibration 20 g rms random 3 axis
Radiation tolerance > 20 krad