Modular Electrical Power System

The second-generation Modular Electrical Power System (IMEPS2) redefines Electrical Power Subsystems for small satellites. Built on a modular, distributed design, it enables unmatched adaptability, tailoring power solutions to your platform’s exact needs without full customization. With cutting-edge technology, IMEPS2 ensures superior efficiency, reduced EMI, and scalable redundancy across.

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Enhanced Reliability: FRAM-based MCUs with radiation tolerance
Advanced Protection: Over-current protection and hardware-based MPPT
Built-in Supervisor: Watchdog for system safety
High-Efficiency Interface: GaN-FET-based solar panel input
Output Channels:
- Buck-regulated power with a soft start.
- Over-current, reverse-current, and over-voltage protection
- Configurable auto-enable and retry timings
- Precise voltage, current, and power sensing
Energy Efficient: Minimal idle consumption with disabled outputs

DataSheet

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12 Configurable Output Channels

4 Independent MPPT Channels

Integrated Battery Balancing and Heating

Product Specification

Mass	PCU: 58g PBP: 252.0g PBU: 48.7g PDU: 58g (incl. Full CSKB)
Volume	PBP: 90 x 96 x 21 mm PCU: 90 x 96 x 12 mm PBU: 90 x 96 x 10 mm PDU: 90 x 96 x 14 mm
Operating Temperature Range	– 20°C to +70°C
Data Interfaces	I2C, UART, SPI optional.
Power Battery Pack (PBP)	• Lithium-Ion Cells • Operating Voltage Vbat: 8V – 16.0V • Storage capacity: 45Wh per pack (4 cells) • Battery Pack Configuration: 4 cells in series • 10A fuse per pack
Power Conditioning Unit (PCU)	• 4x MPPT channels per board • Maximum Input Current: 3A per channel • Output Voltage: 16V (other voltages upon request) • Max Input Power (per channel): 39W (5 series, 6 parallel solar cell strings)
Power Battery Unit (PBU)	• Max Output Power: 64W at 16V • Battery Heating & Balancing • Telemetry: Total input/output current, voltage, power, cell voltage, temperature
Power Distribution Unit (PDU)	• 3x Switchable VD0 Battery voltage lines (12.8V – 16.0V) • 1x Permanent VD0 Battery voltage lines (12.8V – 16.0V) • 4x Switchable VD1 voltage lines (3V3, 5V or custom up to 12V) • Max current of 3A per line • 4x Max current of 4A (continuous) and 6A (peak) for VD0, VD1 and VD2

Qualification and Acceptance Testing

	QT Is performed on the design/qualification model	AT Is performed on the unit to be shipped
Functional Test
Thermal Vacuum
Thermal Cycling
Vibration Test
Mechanical Shock Test

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