ISIS iEPS Electrical Power System
€3300 - €7500
▪ Compact single PC/104 form factor board solution
▪ FRAM based MCUs for improved radiation tolerance
▪ Hardware voltage, over-current protection and hardware-based maximum power point tracking
▪ Designed for low (idle) power consumption
▪ Solar Panel interface utilizes GaN-FETs
▪ Allows customizations through mountable daughter-board
- Description
- Features
- Product properties
- Configuration and options
- Performance
- Documents
Description
The ISIS Electrical Power System (iEPS) is the second-generation compact power system for nanosatellites, ideal for 1U up to 3U CubeSats. The system leverages wide bandgap semiconductor technologies, implementing GaN-FETs to improve solar power conversion efficiency and performance. It is equipped with an integrated heater, hardware-based Maximum Power Point Tracking (MPPT) and hardware voltage and over-current protection. The iEPS provides 3.3V and 5 V regulated buses, as well as an unregulated bus. An add-on daughter board allows additional configurations to suitably power the system and payload instruments.
- Compact solution – one PC104 form factor board, ideal for 1U-3U sized platforms
- Communication over I2C, UART for testing
- FRAM-based MCUs for improved radiation tolerance
- Low (idle) power consumption, dedicated emergency low power mode for EPS survivability
- Hardware voltage, over-current protection and hardware-based maximum power point tracking
- Hardware Supervisor including Watchdog
- Solar Panel interface utilizes GaN-FETs
- Allows customizations through the mountable daughterboard
| Mass | Type A 184 ± 5 grams (2 cell battery pack) Type B 310 ± 5 grams (4 cell battery pack) Type C 360 ± 5 grams (4 cell battery pack + daughterboard) |
| Volume | Type A 96 x 92 x 26.45 mm (PCB and top battery) Type B 96 x 92 x 11.34 mm (PCB B only) Type C 96 x 92 x 15.95 mm (PCB C only) Type B/C 94.4 x 89.3 x 21 mm (4-Cell Battery Pack) |
| Operating temperature range | -20°C to +60°C |
| Power delivered | 20W @ 5V over 4 channels |
| Energy storage | 6300mAh/22.5Wh (Type A) 12800mAh/22.5Wh (Type B/C) |
Type A: iEPS board with integrated 2 Li-ion cell battery pack
Type B: iEPS board with modular 4 Li-ion cell battery pack
Type C: iEPS board with modular 4 Li-ion cell battery pack and daughterboard
Allows customization through mountable daughterboard, provides the following voltage domains:
• VD10: Unregulated voltage with one output channel
• VD11: Custom voltage lower than VD10, one output channel
• VD12: Set to 5V with 4 output channels. Voltage can be customized to any voltage lower than VD0.
Daughter board enables ISIS AntS2.0 interface and ISIS solar panel sensor interface and data readout. The 4-cell battery pack can be placed freely in the stack, further custom configurations upon request.
| Output voltage domains | VDO: 5V VD1: 3V3 VD2: user selectable (type C with Daughter board) |
| Main bus organization | Unregulated bus |
| Functional protection | Emergency Low Power Mode (when Bus voltage low) Hardware Supervisor including Watchdog Firecode stack reset capability On board housekeeping measurement |
| Electrical protection | Overcurrent/thermal limit on Unit input on each output bus channel: – overcurrent/thermal protection – reverse current protection |
| Communication interface | I²C |
