2 layers319.7 × 58.4 mm
2 layers50 × 105 mm
VoltageTap A
Gregification/BeeMS5Battery Management System
- Size
- 50 × 105 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 144
- Nets
- 157
- Pads
- 462
- Tracks, vias
- 1,042, 221
- Pours
- 31
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 11 May 2025
- Updated
- 15 Sep 2026
Overview
VoltageTap A is an open-source printed circuit board by Gregification, from the Gregification/BeeMS repository on GitHub, published under the MIT licence. It is a 2-layer board of 50 × 105 mm with 144 parts on 157 nets, routed with 1,042 tracks and 221 vias.
It is built around the SI1450DH, AP7384-50SA and FCX495, with the ISOM8600DFGR, LM74502DDF and TS4148 among its other parts. Its parts include 59 resistors, 28 capacitors, 25 ICs, 17 diodes and 3 connectors. It belongs with the power boards of this library.
Main components
8
SI1450DH
SOT-363UncategorisedVishay Intertechnology
AP7384-50SA
SOT-23-40℃~+125℃@(Tj) 1 2.5uA 40V 50mA 5V Fixed Positive Short Circuit Protection、Thermal Shutdown SOT-23 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSDiodes IncorporatedVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
FCX495
SOT-89SOT-89 Bipolar (BJT) ROHSTDDBipolar (BJT)
ISOM8600DFGR
SOIC-4-55℃~+125℃ 1.3V 150mA 200mW 200us 200us 20mA 500V 7Ω 80V One normally open: 2A (SPST-NO) SOIC-4 Solid State Relays (MOS Output) ROHSTexas InstrumentsSolid State Relays (MOS Output)
LM74502DDF
TSOT-23-8-40℃~+125℃ 2Ω 3.2V~65V Active High High Side Switch Overvoltage protection、Under-voltage lockout、Reverse voltage protection、Integrated charge pump TSOT-23-8 Power Distribution Switches ROHSTexas InstrumentsPower Distribution SwitchesTS4148
-- Diodes - General Purpose ROHSTaiwan SemiconductorDiodes - General Purpose
ES1D
SMA(DO-214AC)-55℃~+150℃ 1 Independent 1A 1V@1A 200V 35ns 5uA@200V SMA(DO-214AC) Fast Recovery / High Efficiency Diodes ROHSMDDDiodes - Rectifiers - Fast RecoveryMMBT5550L
SOT-23-55℃~+150℃ 1 NPN 100nA 140V 225mW 250mV 60 600mA 6V NPN SOT-23 Bipolar (BJT) ROHSonsemiBipolar (BJT)
README
README.mdBeeMS
Battery Management System (BMS)
a work in progress
BMS for University Of Texas At Arlington's FSAE Race team's E27 vehicle.
point of contact for this repo is George Boone
Development
- Code Composer Studio 12
- dependency on Driver Lib
- projects are stand alone, no dependencies on other projects in this repo.
- Kicad 9
- common symbol and footprint library shared amongst all Kicad projects. "zzLocal".
goerge (Gorge Albrecht) is not in any way involved or associated with this project. that account was accidentally listed as a contributor because of a typo in the spelling of george (George Boone).
Parts
144| Qty | Value | Footprint | References |
|---|---|---|---|
| 17 | 100 | Resistor_SMD:R_0805_2012Metric | R212, R213, R214, R215, R216, R217, R218, R237, R238, R239, R240, R241, R242, R243, R244, R252 +1 |
| 14 | 100n | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C203, C204, C205, C206, C207, C208, C209, C211, C212, C213, C214, C215, C216, C217 |
| 14 | 226 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R221, R222, R223, R224, R225, R226, R227, R245, R246, R247, R248, R249, R250, R251 |
| 14 | 2PD2150-QX | Package_TO_SOT_SMD:SOT-89-3 | U203, U204, U205, U206, U207, U208, U209, U210, U211, U212, U213, U214, U215, U216 |
| 14 | 36 | zzLocalLibraries-Footprints:imperial wide resistor R_ 3264 | R203, R204, R205, R206, R207, R208, R209, R228, R229, R230, R231, R232, R233, R234 |
| 14 | TS4148 | Diode_SMD:D_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D203, D204, D205, D206, D207, D208, D209, D210, D211, D212, D213, D214, D215, D216 |
| 7 | Thermistor | Resistor_SMD:R_1206_3216Metric | TH101, TH102, TH103, TH104, TH105, TH106, TH107 |
| 6 | 220n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C102, C105, C106, C301, C303, C306 |
| 4 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R103, R253, R256, R307 |
| 4 | 10u | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C104, C219, C304, C305 |
| 4 | 1u | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C101, C103, C220, C221 |
| 2 | 4.99k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R254, R302 |
| 2 | 750 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R303, R305 |
| 2 | 97.6k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R301, R306 |
| 2 | ES1D | Diode_SMD:D_SMA | D217, D218 |
| 2 | Si1450DH | Package_TO_SOT_SMD:SOT-363_SC-70-6 | U303, U305 |
| 1 | 100k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R107 |
| 1 | 2.4k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R304 |
| 1 | 40.2k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R106 |
| 1 | 88.7k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R101 |
| 1 | AP7381-33SA-7 | Package_TO_SOT_SMD:SOT-23 | U307 |
| 1 | AP7384-50SA | Package_TO_SOT_SMD:SOT-23 | U306 |
| 1 | Conn_01x06_Pin | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J104 |
| 1 | Conn_01x18_Pin | Connector_PinHeader_2.54mm:PinHeader_1x18_P2.54mm_Vertical | J102 |
| 1 | FCX495 | Package_TO_SOT_SMD:SOT-89-3 | U218 |
| 1 | HRLV | Connector_Molex:Molex_Micro-Fit_3.0_43045-0600_2x03_P3.00mm_Horizontal | J101 |
| 1 | ISOM8600DFGR | zzLocalLibraries-Footprints:SOIC4_DFG_TEX-M | U301 |
| 1 | ISOW7741 | Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm | U101 |
| 1 | LM74502 | Package_TO_SOT_SMD:SOT-23-8_Handsoldering | U304 |
| 1 | MCP2542FDxMF | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U302 |
| 1 | MMBT5550L | Package_TO_SOT_SMD:SOT-23 | Q301 |
| 1 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H101 |
| 1 | PBQ76952PFBT | zzLocalLibraries-Footprints:BQ76952_PFB48_TEX | U217 |
| 1 | SW_Push | zzLocalLibraries-Footprints:wurth elektronik 4.7x3.5mm side push button | SW101 |
| 1 | XM0G3507QPTRQ1 | zzLocalLibraries-Footprints:PT0048A-IPC_B | U102 |
| 1 | green | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D301 |
The 142 most common of 144 parts.
Questions
How big is the VoltageTap A PCB?
It measures 50 × 105 mm and has 2 copper layers, 1.6 mm thick.
What parts does the VoltageTap A use?
144 parts, built around the SI1450DH, AP7384-50SA, FCX495 and ISOM8600DFGR. 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 VoltageTap A KiCad files?
From the Gregification/BeeMS repository on GitHub, at the commit this page was made from: the board is hardware/VoltageTap_A/VoltageTap_A.kicad_pcb and its schematic hardware/CAN DC SS switch/CAN DC SS switch.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the VoltageTap A design in my own project?
Its repository publishes it under the MIT 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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