E28-200 28V SmallSat Electric Power System
ibeos
250W radiation-tolerant 28V SmallSat EPS with peak-power tracking, 96% solar array efficiency, 3.3V/5V/12V/28V buses, 10x switched outputs, RS-422/485/I2C/SPI, 30 kRad TID, TRL 9.
Technical specifications
- Max Solar Array Input
- >250W (14–34V input)
- S/A Conversion Efficiency
- 96%
- 3.3V Output
- 3A (92% efficiency)
- 5V Output
- 6A (93% efficiency)
- 12V Output
- 4A (95% efficiency)
- Unregulated 28V Bus
- 10A
- Max Charge Voltage
- 33.6V
- Max Charge Current
- 7A
- Switched Outputs
- 10x (10 mOhm typical)
- Interfaces
- RS-422/485 @ 115.2 kbps; I2C @ 400 kbps; SPI @ 1 Mbps
- Quiescent Power
- 2.5W
- Dimensions
- 96 x 90 x 14.5 mm
- Mass
- 140 g
- Operating Temperature
- -40 to +105 deg C
- TID
- 30 kRad(Si)
- TRL
- 9
About
The Ibeos E28-200 is a 250W SmallSat Electric Power System providing radiation-tolerant flexible peak-power tracking for 28V battery systems. Delivers regulated 3.3V (3A), 5V (6A), and 12V (4A) buses plus an unregulated 28V battery bus at 10A. Includes 10 switched and unswitched current-limited outputs. Commands and telemetry via RS-422, RS-485 at 115.2 kbps, I2C at 400 kbps, and SPI at 1 Mbps. Protection includes OVP, UVP, OCP, and a configurable watchdog timer. Solar array conversion efficiency is 96%; regulator efficiencies are 92–95%. Operates from -40 to +105 deg C.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.
