2 layers35.1 × 28.9 mm
Bms buck boost
tor1kk/bms-buck-boost
Battery Management System (BMS) with Buck-Boost Converter
38 parts10GPL-3.0
4 layers110 × 30.5 mm
FitLensPCB
nabudahab/FitLensPCBFitLens Senior Design PCB
- Size
- 110 × 30.5 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 107
- Nets
- 157
- Pads
- 463
- Tracks, vias
- 972, 183
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 24 Jan 2026
- Updated
- 3 Mar 2026
Overview
FitLensPCB is an open-source printed circuit board by nabudahab, from the nabudahab/FitLensPCB repository on GitHub. It is a 4-layer board of 110 × 30.5 mm with 107 parts on 157 nets, routed with 972 tracks and 183 vias.
It is built around the MDBT42Q-512KV2, TPS63020DSJR and 74AHC1G08GW, with the DW01A, MAX6816EUS and TPD2EUSB30DRT among its other parts. Its parts include 31 capacitors, 27 resistors, 14 connectors, 12 ICs and 10 diodes. It belongs with the STM32 and nRF52 and nRF5x boards of this library.
Main components
11
MDBT42Q-512KV2
QFN-41加密功能、Mesh组网 QFN-41 Bluetooth Modules ROHSRAYTACBluetooth Modules
TPS63020DSJR
VSON-14-EP(3x4)-40℃~+85℃@(TA) 1 1.2V~5.5V 1.8V~5.5V 2.4MHz 3A 50uA Adjustable Buck-Boost Buck-Boost Built-in Yes VSON-14-EP(3x4) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
74AHC1G08GW
SOT-353-40℃~+125℃ 1 1.5V~3.85V 1.9V~2V、2.9V~3V、3.7V~3.94V、4.4V~4.5V 100mV、360mV~550mV 10nA 2 2V~5.5V 500mV~1.65V 74AHC Series 9.5ns@3.3V,15pF AND Gate Overvoltage-tolerant input StandardCMOS SOT-353 Logic Gates ROHSMDDLogic Gates
DW01A
SOT-23-6L-40℃~+85℃ 1 2.5V 300mV~10V 3uA 4.3V Protection IC Support SOT-23-6L Battery Management ROHSPUOLOPBattery Management
MAX6816EUS
SOT143±15kV ESD-Protected, Single CMOS Switch DebouncersMaxim Integrated (Analog Devices)Uncategorised
TPD2EUSB30DRT
SOT(9x3)-40℃~+85℃ 0.7pF 2 45W 5.5V 5A@8/20us 7V 8V ESD IEC 61000-4-2、IEC 61000-4-5 Unidirectional SOT(9x3) ESD and Surge Protection (TVS/ESD) ROHSTexas InstrumentsESD And Surge Protection (TVS/ESD)
1N5819WS
SOD-3231 Independent 1A 25A 40V 500uA@40V 600mV@1A SOD-323 Schottky Diodes ROHSGuangdong HottechSchottky Diodes
SS12
SMA(DO-214AC)Schottky Diodeshongjiacheng
AO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETsFS8205A
SOT-23-6-55℃~+150℃ 1.2V 1.5W 2 N-Channel 20V 31.5mΩ@2.5V 466pF 5.7nC@4.5V 58pF 65pF 6A SOT-23-6 MOSFETs ROHSTECH PUBLICMOSFETs
LESD5D5.0CT1G
SOD-523-55℃~+150℃ 100W 12pF 16V 1uA 5V 7A 7V Bidirectional ESD IEC 61000-4-2 SOD-523 ESD and Surge Protection (TVS/ESD) ROHSGOODWORKUncategorised
Parts
107| Qty | Value | Footprint | References |
|---|---|---|---|
| 14 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3, C6, C12, C13, C14, C15, C16, C17, C20, C21, C22, C28, C30, C32 |
| 7 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8, R11, R13, R15, R16, R26, R28 |
| 4 | 1x1 | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | J7, J8, J9, J10 |
| 4 | 22uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C7, C8, C9, C10 |
| 4 | C | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C18, C19, C26, C29 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_2.2mm_M2_DIN965_Pad | H1, H2, H3, H4 |
| 3 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4, C5, C24 |
| 3 | LED | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D6, D9, D10 |
| 2 | 1N5819WS | Diode_SMD:D_SOD-323F | D3, D4 |
| 2 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R14, R24 |
| 2 | 1k | Resistor_SMD:R_0805_2012Metric | R17, R23 |
| 2 | 2K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R4 |
| 2 | 4.7uF | Capacitor_Tantalum_SMD:CP_EIA-3216-18_Kemet-A | C1, C2 |
| 2 | 470 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R25, R27 |
| 2 | 47k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R19, R20 |
| 2 | 5.1K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5, R6 |
| 2 | AT42QT1010-TSHR | Package_TO_SOT_SMD:SOT-23-6 | U6, U7 |
| 2 | PMOS | Package_TO_SOT_SMD:SOT-723 | Q3, Q4 |
| 2 | R_S | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9, R12 |
| 2 | SS12 | Diode_SMD:D_SOD-123F | D7, D8 |
| 1 | 100R | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3 |
| 1 | 100uF | Capacitor_Tantalum_SMD:CP_EIA-3528-21_Kemet-B | C11 |
| 1 | 1K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 1 | 1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C23 |
| 1 | 2.2uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C31 |
| 1 | 2.2uH | Inductor_SMD:L_Chilisin_BMRx00060630 | L1 |
| 1 | 25M | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R21 |
| 1 | 32.768kHz | Crystal:Crystal_SMD_FOX_FE-2Pin_7.5x5.0mm_HandSoldering | Y2 |
| 1 | 32mHz | Crystal:Crystal_SMD_0603-2Pin_6.0x3.5mm_HandSoldering | Y1 |
| 1 | 4.7uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C34 |
| 1 | 47K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R7 |
| 1 | 56k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R10 |
| 1 | 74AHC1G08 | Package_TO_SOT_SMD:SOT-23-5_HandSoldering | U8 |
| 1 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q2 |
| 1 | CD-PA1616D | CD-PA1616D:XCVR_CD-PA1616D | U9 |
| 1 | Conn_01x02_Pin | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J2 |
| 1 | Conn_01x02_Pin | Connector_JST:JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J12 |
| 1 | Conn_01x03_Pin | Connector_JST:JST_EH_B3B-EH-A_1x03_P2.50mm_Vertical | J4 |
| 1 | Conn_01x03_Pin | Connector_JST:JST_XH_S3B-XH-A-1_1x03_P2.50mm_Horizontal | J6 |
| 1 | Conn_01x05_Pin | Connector_Hirose:Hirose_DF13-05P-1.25DS_1x05_P1.25mm_Horizontal | J11 |
| 1 | Conn_01x05_Socket | Connector_Hirose:Hirose_DF52-5S-0.8H_1x05-1MP_P0.80mm_Horizontal | J13 |
| 1 | Conn_Pin | Connector_JST:JST_XH_S3B-XH-A-1_1x03_P2.50mm_Horizontal | J5 |
| 1 | DW01A | DW01A:SOT95P280X145-6N | U2 |
| 1 | FS8205A | FS8205A:SOP65P640X120-8N | Q1 |
| 1 | LED | LED_SMD:LED_0805_2012Metric | D5 |
| 1 | LED | Diode_SMD:D_SOD-323F | D1 |
| 1 | LESD5D5.0CT1G | Diode_SMD:D_SOD-323F | D2 |
| 1 | MAX17048G_T10 | MAX17048G_T10:SON50P200X200X80-9N | U10 |
| 1 | MAX6816 | Package_TO_SOT_SMD:SOT-143 | U12 |
| 1 | MCP73831-2-OT | MCP73831T-2ACI_OT:SOT95P280X145-5N | U1 |
| 1 | MDBT42Q-512KV2 | MDBT42Q-512KV2:RAYTAC_MDBT42Q-512KV2 | E1 |
| 1 | MX25L3233FM1 | MX25L3233FM2I-08G:SOIC127P790X216-8N_MX25L3233FM2I-08G | U5 |
| 1 | R_LDR | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R18 |
| 1 | STM Debug | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Horizontal | J15 |
| 1 | STM32WB55RGVx | Package_DFN_QFN:QFN-68-1EP_8x8mm_P0.4mm_EP6.4x6.4mm | U4 |
| 1 | SW_Push | Button_Switch_SMD:SW_SPST_CK_RS282G05A3 | SW1 |
| 1 | TPD2EUSB30 | Package_TO_SOT_SMD:Texas_DRT-3 | U11 |
| 1 | TPS63020DSJR | TPS63020DSJR:IC_TPS63020DSJR | U3 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_GCT_USB4085 | J3 |
| 1 | nRF debug | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Horizontal | J1 |
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Questions
How big is the FitLensPCB PCB?
It measures 110 × 30.5 mm and has 4 copper layers, 1.6 mm thick.
What parts does the FitLensPCB use?
107 parts, built around the MDBT42Q-512KV2, TPS63020DSJR, 74AHC1G08GW and DW01A. 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 FitLensPCB KiCad files?
From the nabudahab/FitLensPCB repository on GitHub, at the commit this page was made from: the board is FitLensPCB.kicad_pcb and its schematic FitLensPCB.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the FitLensPCB design in my own project?
Its repository states no licence, so its author keeps all rights: ask nabudahab before reusing the design.