6 layers56 × 56 mm
4 layers70 × 50 mm
Mjpower ss
mjbots/power_dist15This repository contains hardware and firmware for the mjbots powerdist and mjpower-ss boards. Both provide pre-charge, over-current limiting and connector fanout.
- Size
- 70 × 50 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 35
- Nets
- 20
- Pads
- 88
- Tracks, vias
- 111, 75
- Pours
- 14
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 2 Dec 2020
- Updated
- 16 Dec 2025
Overview
Mjpower ss is an open-source printed circuit board by mjbots, from the mjbots/power_dist repository on GitHub, published under the Apache-2.0 licence. It is a 4-layer board of 70 × 50 mm with 35 parts on 20 nets, routed with 111 tracks and 75 vias.
It is built around the TPS2490DGSR, ZXTR2005Z and XT30UPB-F, with the PSMN3R7-100BSEJ, RC0603FR-073K3L and B4B-PH-SM4-TB(LF)(SN) among its other parts. Its parts include 10 resistors, 8 connectors, 4 capacitors, 3 diodes and 3 transistors.
Main components
11
TPS2490DGSR
MSOP-10-40℃~+85℃ 9V~80V Overcurrent Protection、Operating status indication、Adjustable current limiting、Protection latch MSOP-10 Power Distribution Switches ROHSTexas InstrumentsSupervisor And Reset ICs
ZXTR2005Z
SOT-89-3-40℃~+125℃@(Tj) 1 100V 260uA 38mA 4.5V~5.5V 45dB@(100Hz) Fixed Positive SOT-89-3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSDiodes IncorporatedVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
XT30UPB-F
--、Aviation model plug 0.65mΩ 15A DC 500V Female Gold Plated PA Yellow - Power connector / plug connector ROHSAMASSPlug
PSMN3R7-100BSEJ
TO-263-55℃~+175℃ 1 N-channel 100V 120A 16.37nF 2.66V 246nC@10V 3.95mΩ@10V 405W 494pF TO-263 MOSFETs ROHSNexperiaMOSFETs
RC0603FR-073K3L
UncategorisedUnknown maker
B4B-PH-SM4-TB(LF)(SN)
SMD,P=2mm-25℃~+85℃ 1 100V 11.95mm 1x4P 2A 2mm 4 4P 6.6mm 7mm Auxiliary Solder Pin Beige Copper alloy PA PH Surface Mount,Vertical Tin UL94V-0 SMD,P=2mm Wire To Board Connector ROHSJSTWire To Board Connector
V10P15-M3/H
SMPC(TO-277A)-40℃~+150℃ 1 Independent 1.08V@10A 10A 150V 180A 200uA@150V SMPC(TO-277A) Schottky Diodes ROHSVishay IntertechnologySchottky Diodes
APD3224ZGC-F01
SMD,3.2x2.4mm-40℃~+85℃ 102.5mW 20mA 20° 3.3V 515nm 525nm 7cd Discrete Diode Emerald Green Water Clear SMD,3.2x2.4mm LED Indication - Discrete ROHSKingbrightLED Indication - Discrete
WSLF2512L5000FEA
2512-65℃~+170℃ 0.5mΩ 6W ±1% ±200ppm/℃ 2512 Chip Resistor - Surface Mount ROHSVishay IntertechnologyChip Resistor - Surface MountG-107-0513
插件-20℃~+105℃ 12.83mm 125V 2.29mm 7.75mm PC Pin Rectangular Columnar SPDT Through Hole Plugin Slide Switches ROHSCW INDUSTRIESSlide Switches
XT90PW-M.G.Y
-0.4mΩ 30A 7.4mm 8/10/12AWG DC 500V Gold Plated PA Plug、- Yellow - Power connector / plug connector ROHSChangzhou Amass ElecPlug
README
README.mdmjbots power_dist and mjpower-ss
This repository contains hardware and firmware for the mjbots power_dist and mjpower-ss boards. Both provide pre-charge, over-current limiting and connector fanout. The power_dist additionally provides energy monitoring and a soft-switch functionality.
Specifications
| Name | power_dist r4.5b | mjpower-ss r2 |
|---|---|---|
| Voltage Input | 10-44V | 10-54V |
| Current (continous/peak) | 45A/90A | 45/90A |
| Output | 6x XT30 | 6x XT30 |
| Max load capacitance | 4000uF | 4000uF |
| Quiescent current | 300uA | 200uA |
| Dimensions | 80x50mm | 70x50mm |
| Mass | 36g | 34g |
| External switch | X | X |
| Soft switch | X | |
| Onboard switch | X | |
| CAN communication | X |
Documentation
Parts
35| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | Conn_01x02_Pin | footprints:XT30UPB-F | P1, P2, P3, P4, P5, P6 |
| 3 | PSMN3R7-100BSEJ | footprints:TRANS_PSMN3R7-100BSEJ | Q1, Q2, Q3 |
| 2 | 0.01uF 100V | Capacitor_SMD:C_0603_1608Metric | C3, C4 |
| 2 | 1k | Resistor_SMD:R_0603_1608Metric | R2, R9 |
| 2 | 3.3k | Resistor_SMD:R_0603_1608Metric | R8, R10 |
| 1 | 10 | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 10nF | Capacitor_SMD:C_0603_1608Metric | C2 |
| 1 | 140k 1% | Resistor_SMD:R_0603_1608Metric | R7 |
| 1 | 27nF 100V | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 47k 1% | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 499k 1% | Resistor_SMD:R_0603_1608Metric | R6 |
| 1 | 6.8k 1% | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | Conn_01x04_Pin | footprints:JST_B4B-PH-SM4-TB | J2 |
| 1 | D_Schottky | footprints:TO-277A | D3 |
| 1 | LED | LED_SMD:LED_1210_3225Metric | D2 |
| 1 | R_Shunt_US | footprints:WSL2512_SHUNT | R3 |
| 1 | SMC5K51A-M3/I | Diode_SMD:D_SMC | D1 |
| 1 | SW_SPDT | footprints:SW_G-107-0513 | SW1 |
| 1 | TPS2490DGSR | footprints:SOP50P490X110-10N | U1 |
| 1 | XT90PW-M | footprints:AMASS_XT90PW-M | P7 |
| 1 | ZXTR2005Z | Package_TO_SOT_SMD:SOT-89-3 | U2 |
The 31 most common of 35 parts.
Questions
How big is the Mjpower ss PCB?
It measures 70 × 50 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Mjpower ss use?
35 parts, built around the TPS2490DGSR, ZXTR2005Z, XT30UPB-F and PSMN3R7-100BSEJ. 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 Mjpower ss KiCad files?
From the mjbots/power_dist repository on GitHub, at the commit this page was made from: the board is hw/mjpower-ss/r2/mjpower_ss.kicad_pcb and its schematic hw/mjpower-ss/mjpower_ss.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Mjpower ss design in my own project?
Its repository publishes it under the Apache-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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