2 layers55.1 × 45.2 mm
4 layers92 × 92 mm
Electrical Power System
- Size
- 92 × 92 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 141
- Nets
- 216
- Pads
- 686
- Tracks, vias
- 1,563, 325
- Pours
- 40
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 22 May 2023
- Updated
- 20 May 2025
Overview
EPS PDB is an open-source printed circuit board by Student-Satellite-IITB, from the Student-Satellite-IITB/Electrical-Power-System repository on GitHub. It is a 4-layer board of 92 × 92 mm with 141 parts on 216 nets, routed with 1,563 tracks and 325 vias.
It is built around the STM32L476VET6, SN65HVD256D and AD7708BRUZ, with the LM5000-3MTCX, AMS1117-3.3 and TPS3824-33QDBVRQ1 among its other parts. Its parts include 48 capacitors, 43 resistors, 19 ICs, 4 connectors and 3 diodes. It belongs with the STM32 boards of this library.
Main components
7
STM32L476VET6
LQFP-100(14x14)-40℃~+85℃ 1.71V~3.6V 128KB 12bit 12bit 32 Bit 512KB 80MHz 82 ARM Cortex-M4 Built-in FLASH LQFP-100(14x14) Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
SN65HVD256D
SOIC-8-40℃~+125℃ 1Mbps 5V 5mA 85mA CAN Transceiver SOIC-8 CAN Transceivers ROHSTexas InstrumentsCAN Transceivers
AD7708BRUZ
TSSOP-28-40℃~+85℃ 16 19.79Hz 30uA 32.768kHz 3V、5V 8 Built-in External SPI Sigma-Delta Support Yes TSSOP-28 Analog to Digital Converters (ADC) ROHSAnalog DevicesAnalog To Digital Converters (ADC)
LM5000-3MTCX
TSSOP-16-40℃~+125℃@(TJ) 1 1.35A 2mA 3.1V~40V 3.1V~80V 300kHz、700kHz Adjustable Boost Boost、Flyback、Forward Built-in No TSSOP-16 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
TPS3824-33QDBVRQ1
SOT-23-5-40℃~+125℃@(Ta) 1 1.1V~5.5V 15uA 2.93V 200ms Active Low Push-pull Voltage Monitor Yes Yes SOT-23-5 Supervisor and Reset ICs ROHSTexas InstrumentsSupervisor And Reset ICs
TS4061BICT-1.25
SOT-323-3-40℃~+85℃@(Ta) 1.25V 10uVp-p 15mA 35ppm/℃ 95uVrms Fixed Parallel ±0.2% SOT-323-3 Voltage Reference ROHSSTMicroelectronicsVoltage Reference
README
README.mdELECTRICAL POWER SYSTEM
This repository contains all software and hardware for the Electrical Power subsystem for the IITBSSP CubeSat mission
Current status:
- EPS PDB and PMB Assembly
- Battery Unit Development Board
- Power Distribution and Regulation Development Board
- MATLAB/Simulink model of EPS in development
- Testing of Solar Input Development Board
- Testing of Control Unit Development Board
Completed:
- EPS PDB Board Design
- EPS PMB Board Design
- Solar Input Development Board
- EPS Control Unit Development Board
Maintained by:
- Ameya Marakarkandy ameya.marakarkandy@gmail.com
- Yash Paritkar paritkary25@gmail.com
Parts
141| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | 10k | Resistor_SMD:R_0603_1608Metric | R5, R14, R15, R16, R18, R19, R20, R22, R23, R24, R25, R41, R42 |
| 13 | 1uF | Capacitor_SMD:C_0603_1608Metric | C12, C13, C17, C18, C21, C26, C33, C34, C36, C37, C42, C43, C45 |
| 8 | 100nF | Capacitor_SMD:C_0603_1608Metric | C4, C5, C6, C7, C8, C9, C10, C14 |
| 7 | 1k5 | Resistor_SMD:R_0603_1608Metric | R1, R2, R8, R9, R10, R11, R12 |
| 5 | 400k | Resistor_SMD:R_0603_1608Metric | R31, R33, R34, R37, R38 |
| 4 | 10pF | Capacitor_SMD:C_0603_1608Metric | C15, C16, C19, C20 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_Pad | H1, H2, H3, H4 |
| 3 | 10nF | Capacitor_SMD:C_0603_1608Metric | C11, C28, C35 |
| 3 | 10uF | Capacitor_SMD:C_0603_1608Metric | C3, C29, C38 |
| 3 | 560 | Resistor_SMD:R_0603_1608Metric | R35, R39, R43 |
| 2 | 1.3k | Resistor_SMD:R_0603_1608Metric | R36, R40 |
| 2 | 100 | Resistor_SMD:R_0603_1608Metric | R4, R7 |
| 2 | 100k | Resistor_SMD:R_0603_1608Metric | R3, R6 |
| 2 | 10uF | Capacitor_SMD:C_1206_3216Metric | C44, C48 |
| 2 | 130k | Resistor_SMD:R_0603_1608Metric | R21, R28 |
| 2 | 2.2k | Resistor_SMD:R_0603_1608Metric | R17, R26 |
| 2 | 2.2uF | Capacitor_SMD:C_0603_1608Metric | C41, C46 |
| 2 | 2.2uH | Inductor_SMD:L_Wuerth_WE-XHMI-8080 | L2, L3 |
| 2 | 22uF | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 2 | 4.7uF | Capacitor_SMD:C_1206_3216Metric | C31, C32 |
| 2 | 47uF | Capacitor_SMD:C_1206_3216Metric | C40, C47 |
| 2 | C | Capacitor_SMD:C_0603_1608Metric | C30, C39 |
| 2 | Conn_02x26_Odd_Even | PC104_BUS:SAMTEC_ESQ-126-39-G-D | J3, J4 |
| 2 | D_Schottky | Diode_SMD:D_0805_2012Metric | D4, D5 |
| 2 | FerriteBead | Resistor_SMD:R_0805_2012Metric | 120R1, 120R2 |
| 2 | PMOS | Package_TO_SOT_SMD:SOT-23-3 | Q1, Q2 |
| 2 | SN65HVD256D | SN65HVD256D:D8 | U2, U3 |
| 2 | USB_POW_EN | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP1, JP3 |
| 2 | ~ | Jumper:SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm | JP4, JP6 |
| 1 | 0 | Resistor_SMD:R_0603_1608Metric | R13 |
| 1 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C24 |
| 1 | 0.47uF | Capacitor_SMD:C_0603_1608Metric | C23 |
| 1 | 10 | Resistor_SMD:R_0603_1608Metric | R27 |
| 1 | 100pF | Capacitor_SMD:C_0603_1608Metric | C25 |
| 1 | 15k | Resistor_SMD:R_0603_1608Metric | R30 |
| 1 | 18k | Resistor_SMD:R_0603_1608Metric | R29 |
| 1 | 32.768kHz | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y2 |
| 1 | 32MHz | Crystal:Crystal_SMD_Abracon_ABM8AIG-4Pin_3.2x2.5mm | Y1 |
| 1 | 3300pF | Capacitor_SMD:C_0603_1608Metric | C27 |
| 1 | 4.7uF | Capacitor_SMD:C_0603_1608Metric | C22 |
| 1 | 510 | Resistor_SMD:R_0603_1608Metric | R32 |
| 1 | 8.2uH | Inductor-WE-XHMI-5050:WE-XHMI-5050 | L1 |
| 1 | AD7708BRUZ | AD7708BRUZ:SOP65P638X110-28N | U14 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U1 |
| 1 | Conn_01x04_Pin | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Horizontal | J2 |
| 1 | D | Diode_SMD:D_1206_3216Metric | D6 |
| 1 | EPS_3V3_LED | LED_SMD:LED_0805_2012Metric | 5V_LED |
| 1 | EPS_5V_LED | LED_SMD:LED_0805_2012Metric | 3V3_LED |
| 1 | EPS_LED | LED_SMD:LED_0805_2012Metric | HEARTBEAT |
| 1 | Jumper_2_Bridged | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP2 |
| 1 | Jumper_3_Bridged12 | Jumper:SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm | JP5 |
| 1 | LM5000-3MTCX | LM500:SOP65P640X120-16N | U11 |
| 1 | LOGO | IITBSSP Logo:IITBSSP_Logo | G*** |
| 1 | LTC3624EMSE-3.3PBF | LTC3624EMSE-3.3PBF:SOP65P490X110-13N | U15 |
| 1 | LTC3624IDD-25PBF | LTC3624IDD-25PBF:DFN-8_DD | U19 |
| 1 | STM32L476VET6 | Package_QFP:LQFP-100_14x14mm_P0.5mm | U4 |
| 1 | SW_SPDT | Button_Switch_SMD:SW_SPST_B3U-1100P | SW1 |
| 1 | TPS259621DDAT 3V3_ADCS | TPS259621DDAT:IC_TPS259621DDAT | U6 |
| 1 | TPS259621DDAT_12V_ADCS | TPS259621DDAT:IC_TPS259621DDAT | U18 |
| 1 | TPS259621DDAT_3V3_ANT | TPS259621DDAT:IC_TPS259621DDAT | U7 |
| 1 | TPS259621DDAT_3V3_EPS | TPS259621DDAT:IC_TPS259621DDAT | U9 |
| 1 | TPS259621DDAT_5V_ADCS | TPS259621DDAT:IC_TPS259621DDAT | U16 |
| 1 | TPS259621DDAT_5V_COMM | TPS259621DDAT:IC_TPS259621DDAT | U17 |
| 1 | TPS259621DDAT_5V_EPS | TPS259621DDAT:IC_TPS259621DDAT | U12 |
| 1 | TPS259621DDAT_5V_OBC | TPS259621DDAT:IC_TPS259621DDAT | U13 |
| 1 | TPS259621DDAT_5V_PAY | TPS259621DDAT:IC_TPS259621DDAT | U10 |
| 1 | TPS3824-33QDBVRQ1 | TPS3824:tps3824 | U5 |
| 1 | TS4061BICT-1.25 | TS4061BICT:SOT323-3L_1P35X2P2X0P65_STM | U8 |
| 1 | USB_B_Micro | Connector_USB:USB_Micro-B_GCT_USB3076-30-A | J1 |
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Questions
How big is the EPS PDB PCB?
It measures 92 × 92 mm and has 4 copper layers, 1.6 mm thick.
What parts does the EPS PDB use?
141 parts, built around the STM32L476VET6, SN65HVD256D, AD7708BRUZ and LM5000-3MTCX. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the EPS PDB KiCad files?
From the Student-Satellite-IITB/Electrical-Power-System repository on GitHub, at the commit this page was made from: the board is EPS Board/EPS v1/EPS_PDB/EPS_PDB.kicad_pcb and its schematic DevelopmentBoards/Battery/BatteryUnit/BatteryUnit.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the EPS PDB design in my own project?
Its repository states no licence, so its author keeps all rights: ask Student-Satellite-IITB before reusing the design.