Linear EPS Module
The Linear EPS Module is a low-cost Electrical Power System (EPS) with 10-20Wh of battery energy. It is designed to power a CubeSat stack of modules during development, and provides attached modules with +7.4Vdc (nominal), +5Vdc and +3.3Vdc rails. Recharging is via the built-in microUSB connector or from system +5V_USB. A three-segment LED bargraph is used to indicate progress when in charging mode and State-of-Charge (SOC) when in discharging mode. An optional extra battery doubles its energy capacity from 10Wh to 20Wh.
The Linear EPS Rev E and later includes a complete command and telemetry interface over I2C via its onboard SupMCU.
The Linear EPS it is not intended for use in space, and has no solar panel interface.
Development Hardware | Not for Space Use
The Linear EPS is an inexpensive way to provide a CubeSat with a few Watts of quiet +5Vdc and +3.3Vdc power from a battery source. It is not intended for use in space, and has no provisions for interfacing to solar cells. Typical usage scenarios are for demonstrations, remote operation with testing chambers, and balloon flights.
The Linear EPS Module automatically switches to charge mode when +5V_USB on the CubeSat Kit Bus Connector is present; when charging, no power is provided on +5V_SYS and VCC_SYS, and VBATT is indeterminate. When +5V_USB is removed, the Linear EPS Module switches to discharge mode, providing +5Vdc to +5V_SYS and +3.3Vdc to VCC_SYS; VBATT is the voltage of a series-connected pair ("2S") of Lithium Polymer batteries (6-8.4Vdc). The Lithium-Polymer batteries are protected against overvoltage (OV), overcurrent (OC) and undervoltage (UV).
Linear EPS Module |
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Linear EPS Module |
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