Linear EPS Module (LEPSM1)
Pumpkin, Inc.
A low-cost development-only Electrical Power System module with 10-20Wh of battery energy that supplies +7.4Vdc, +5Vdc and +3.3Vdc rails to a CubeSat Kit stack during bench development.
Typed specifications45 values
Discloses 7 of 14 fields engineers filter by in this category (category median 7).
- Mass
- 155 g nom. · with option /00 · datasheet p.4 155 g With option /00 | 210 g With option /01 | 210 g nom. · with option /01
- Envelope (L×W×H)
- 90 mm x 96 mm x (14 mm or 24 mm + 2 mm) PCB (Length x Width x Height above PCB + Height below PCB) datasheet p.4 PCB 96 (width) x 90 (length) x 1.6 mm; components up to 24 mm above PCB (option /01) and 2 mm below
- Outputs (as printed)
- Unregulated battery power (6 - 8.2Vdc), Regulated +5V, +3.3V datasheet p.3
- Data interface
- I2C datasheet p.1 I2C can provide EPS telemetry via I2C interface (isolated SDA_SYS…
- Operating temperature
- -40–85 °C absolute maximum rating TA, for on-board electronics · datasheet p.3
- Unit type
- integrated EPS with battery rechargeable EPS with on-board Li-Po batteries, no solar arra… · datasheet p.1
- Board format
- PC/104 corner hole pattern matches PC/104 · datasheet p.4 CubeSat Kit bus for use with all 104-pin CubeSat Kit Bus modules
- Bus and outputs type
- hybrid (regulated rails + battery bus) unregulated battery power plus regulated +5V and +3.3V for Cu… · datasheet p.1
- Unregulated (battery) bus voltage
- 6–8.2 V unregulated battery power to CubeSat Kit Bus · datasheet p.3
- Regulated output voltages
- 3.3 V +3.3V LDO output · datasheet p.5 5 V +5V LDO output | 5 V regulated | 3.3 V regulated
- Integrated battery energy
- 11 Wh option /00, normal capacity (one 7.4V battery, two 3.7V cells) · datasheet p.5 22 Wh option /01, high capacity (two 7.4V batteries, four 3.7V cells)
- Protections
- Auto-resetting overcurrent trip fuses on battery, +5V and +3.3V outputs, overcurrent, overvoltage and undervoltage protection circuits (internal to batteries) datasheet p.1 over-current (LCL) auto-resetting overcurrent trip fuses on battery, +5V and +3.… | battery over-charge / over-discharge batteries automatically disconnect themselves from the load w… | under-voltage lockout battery auto-disconnect voltage 2.7 V per battery, via each b… | over-voltage LDO regulators with built-in overcurrent, overvoltage and rev… +2
- Connector
- 104-pin CubeSat Kit Bus stackthrough headers H1 & H2 (2x26-F each); Hirose DF13-series battery connectors datasheet p.6
- Satellite class
- CubeSat CubeSat Kit · datasheet p.1
- Max current per output
- 1 A +5V_SYS · datasheet p.5 1 A overcurrent trip point for +5V output to CubeSat Kit Bus | 1.5 A Overcurrent trip point for output to CubeSat Kit Bus | 0.5 A Overcurrent trip point for output to CubeSat Kit Bus (+3.3V) | 1 A Overcurrent trip point for output to CubeSat Kit Bus (+5V) +4
- Battery voltage range accepted
- 10 V max · VBATT_MAX, absolute maximum battery voltage applied to CubeSa… · datasheet p.3
- Max battery charge current
- 1.5 A max · IBATT_MAX, absolute maximum battery current, charge and disch… · datasheet p.3
- Integrated battery cell configuration
- Discharging 2S1P (1 battery / 2 cells, option /00) or 2S2P (2 batteries / 4 cells, option /01); charging 2 x 1S1P or 2 x 1S2P; 3.7V 1500mAh Li-Poly iPod cells datasheet p.3
- Inhibit / RBF inputs
- 1 CubeSat Kit Remove-Before-Flight switch (complete power disco… · datasheet p.1 1 CubeSat Kit Separation / Deployment switch (power disconnect …
- Housekeeping telemetry
- EPS telemetry via I2C interface; on-board A/D converter on +5V_USB, +5V_SYS, +5V_EPS, VCC_SYS; LED bargraph indicates charging progress and battery status (25/50/75% capacity remaining) datasheet p.5
Each value is typed with its unit and measurement condition and cites the datasheet page it was taken from. Nothing is guessed: a field that is absent here has not been published by the manufacturer. machine-extracted ✓ checked by NewSpace Market ✓ manufacturer confirmed by the manufacturer.
As published by the supplier11 lines, in the manufacturer's own wording
- Price range
- $980.00 - $1,145.00
- Classification
- Development Hardware | Not for Space Use
- Battery energy
- 10 Wh (standard battery) or 20 Wh (double battery)
- Output rails
- +7.4Vdc (nominal), +5Vdc, +3.3Vdc
- Battery voltage (VBATT)
- 6-8.4 Vdc (2S Lithium Polymer)
- Recharge interface
- Built-in microUSB connector, or system +5 V_USB
- Status indicator
- 3-segment LED bargraph (charge progress / SOC)
- Telemetry interface (Rev E+)
- I2C via onboard SupMCU (command and telemetry)
- Battery protections
- Overvoltage (OV), overcurrent (OC), undervoltage (UV)
- Battery configuration options
- Standard Battery, Double Battery
- Bus interface
- CubeSat Kit Bus standard, 104-pin connector
About
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 indicates 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 Module is explicitly Development Hardware and is Not for Space Use: it is not intended for use in space and has no provisions for interfacing to solar cells. It provides quiet +5Vdc and +3.3Vdc power from a battery source, an inexpensive way to power a CubeSat for demonstrations, remote operation with testing chambers, and balloon flights.
The 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 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). Each unit ships as one complete Linear EPS Module with either 10Wh capacity (standard battery) or 20Wh capacity (double battery), and is compatible with all CubeSats that conform to the CubeSat Kit Bus standard with its 104-pin connector.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.