ISISPACE Compact Electrical Power System

Typed specifications137 values

Discloses 10 of 14 fields engineers filter by in this category (category median 7).

Mass

184 g

nom. · Type A (179-189 g) · datasheet p.9 184 g Type A  |  310 g Type B  |  360 g Type C  |  310 g nom. · Type B (305-315 g)  +1

Total output power

28.8 W

PBP 2S1P · datasheet p.2 57.6 W PBP 4S1P  |  28.8 W PBP-2S1P  |  57.6 W PBP-4S1P

Envelope (L×W×H)

96 x 92 x 26.5 mm (Type A, IU mainboard + 2 cell BP, excluding CSKB)

datasheet p.9 96 x 92 x 26.5 Type A IU mainboard + 2 cell BP  |  94 x 89 x 21.0 Type B and C 4 cell BP  |  96 x 92 x 11.3 Type B IU mainboard  |  96 x 92 x 16 Type C IU mainboard + daughterboard  +2

Outputs (as printed)

3.3V, 5V, unregulated bus

datasheet p.2 Battery Voltage VD0

Supply voltage

7.68 V

Type A battery charge over voltage limit falling · datasheet p.8

Power consumption

0.093 W

static (idle) consumption, typical · datasheet p.7 0.093 W Static (Idle) consumption

Data interface

I2C

datasheet p.2 I2C standard-mode 100 / fast-mode 400 kbit/sec, slave only, 7-bit…

Operating temperature

-40–85 °C

operational temperature without battery · datasheet p.7 0–45 °C with battery, charge up to 800 mA, heaters disabled  |  10–45 °C with battery, charge, heaters disabled  |  -20–60 °C with battery, discharge, heaters disabled

Design lifetime

12 years

Storage lifetime (at relative humidity < 60 %) · datasheet p.7

Unit type

integrated EPS with battery

PIU mainboard + Power Battery Pack · datasheet p.2

Board format

PC/104

follows a PC104 form factor · datasheet p.2

Bus and outputs type

hybrid (regulated rails + battery bus)

3.3V and 5V regulated buses plus an unregulated bus · datasheet p.2

Regulated output voltages

4.99 V

nom. · VD1 output voltage unloaded (4.91-5.07 V) · datasheet p.7 7.2 V PBP-2S1P  |  14.4 V PBP-4S1P  |  3.3 V regulated  |  unregulated unregulated bus  +16

Switchable outputs

1

VD0 number of output channels, Type A and B (Type C: 1+3) · datasheet p.7 4 VD1 (5 V) number of output channels  |  4 VD2 (3.3 V) number of output channels  |  2 VD3 number of output channels, Type C only  |  2 VD4 number of output channels, Type C only  +1

Solar array inputs

3

number of MPPT inputs, Type A and B · datasheet p.8 2 two additional solar MPPT chains on the daughterboard (Type C…  |  5 Type C

Solar input voltage window

3.5 V

min · Functional, Type A · datasheet p.8 3.5 V min · Functional, Type B and C  |  7.5 V max · Functional, Type A  |  13 V max · Functional, Type B and C  |  15 V max · Maximum input voltage MPPT  +2

Solar array regulation

MPPT

datasheet p.5

Integrated battery energy

28.2 Wh

min · three configurations supply from 28.2Whr · datasheet p.2 57.6 Wh max · three configurations supply up to 57.6Whr

Protections

Hardware over-current protection

datasheet p.2 over-voltage battery charge over voltage limits 8.27/7.68 V (Type A), 16.2…  |  under-voltage lockout charge and discharge under voltage limits  |  over-current (LCL) hardware over-current protection; discharge and charge load s…  |  watchdog hardware supervisor including watchdog; I2C watchdog (stack r…  +4

Survival temperature

-50–65 °C

storage temperature without battery · datasheet p.7

Flight heritage

Design based on heritage from PEASSS Cubesat (2016).

datasheet p.3 Second generation improvements flown on the Hiber 1,2 Cubesats (2018).

Satellite class

CubeSat

1U-3U CubeSats, up to 3U XL · datasheet p.2

Quasi-static load

10.8 g

design qualification load static, three axes · datasheet p.3

Max current per output

3.01 A

nom. · VD0 output max. current per channel on PIU (2.75-3.30 A); VD0… · datasheet p.7 4 A PBP-2S1P  |  4 A PBP-4S1P  |  4 A VD1 total for voltage domain  |  4 A VD2 total for voltage domain  +25

Battery voltage range accepted

7.68 V

min · Type A, battery charge over voltage limits, Vth falling · datasheet p.8 3.91 V min · Type A, battery charge under voltage limits, Vth falling  |  5.41 V min · Type A, battery discharge under voltage limits, Vth falling  |  6 V min · Type A, operating voltage software limits  |  15.13 V min · Type B and C, battery charge over voltage limits, Vth falling  +9

Max battery charge current

1.78 A

nom. · battery charge current (1.60-1.96 A) · datasheet p.9

MPPT

yes

hardware-based Maximum Power Point Tracking, perturb and observe · datasheet p.2

Max solar input current

2 A

max · input current per channel; hardware limit 2.5 A · datasheet p.8

Integrated battery cell configuration

Type A: 2S1P (2 in series); Type B and C: 4S1P (4 in series); default 18650 cells, 3.2 Ah nominal capacity, 3.6 V typical cell voltage

datasheet p.8

Battery heater control

yes

automatic integrated battery heater control · datasheet p.2

Inhibit / RBF inputs

3

option with three separation switches (high side, low side) p… · datasheet p.5

Housekeeping telemetry

voltage, current and power sensing on the battery unit and on MPPT input and output; housekeeping telemetry collected by the PIU microcontroller; no MPPT telemetry during eclipse

datasheet p.5

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