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Satellite electrical power system (EPS)

Products and reference designs
Block diagram

Satellite electrical power system (EPS)

Block diagram

Overview

Satellites harness power from solar panels to power spacecrafts. This high voltage supply needs to be stored and converted for all the onboard electronics. Our large portfolio of space-qualified devices and reference designs help you maximize your system performance.

Design requirements

Modern satellite electrical power systems (EPS) require:

  • Multiple low noise and efficient point-of-load supplies.
  • Efficient isolated power supplies to convert the main bus to point-of-load supplies.
  • A feedback method to monitor the secondary supply rail.
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Block diagram

Find products and reference designs for your system.

Satellite electrical power system (EPS)

Solar panels Solar panels Point of load power supply Point of load power supply DC/DC converter DC/DC converter LDO LDO Load switch Loadswitch Current sense Current sense Current sense Currentsense Comp Comp Op amp Op amp Interface Interface CAN CAN RS232 RS232 RS422/RS485 RS422/RS485 LVDS/ECL LVDS/ECL Primary side Primary side PWM Controller PWMController Housekeeping Supply HousekeepingSupply Isolated feedback Isolated feedback Isolated feedback generator Isolated feedback generator Error amp Error amp X X Oscillator Oscillator Calibration, monitor and control Calibration, monitor and control MCU MCU DAC DAC Clock buf Clock buf ADC ADC Logic Logic Comp Comp Ref Ref Temp sense Temp sense Battery Battery Battery management Battery management DC/DC power supply DC/DC power supply PWM controller PWM controller Half-bridge gate driver Half-bridge gate driver

Technical documentation

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Type Title Date
Application note Failure Containment in Spacecraft Point-of-Load Power Supplies 30 Apr 2020
E-book Radiation Handbook for Electronics (Rev. A) 28 Oct 2020
Technical article How to choose the right LDO for your satellite application PDF | HTML 22 Jun 2023
Application note TI Space Rated Power Solution for Microsemi® RTG4™ FPGA (Rev. B) PDF | HTML 19 Jan 2023
Technical article 4 trends in space-grade power management PDF | HTML 16 Aug 2023
Application note Measuring Die Temperature with Remote Diode Sensing in Space 13 Dec 2018
Selection guide TI Space Products (Rev. J) 10 Jun 2024
Application note Use of an LDO as a Load Switch for Space Applications 01 Aug 2018

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