4 layers106 × 63.5 mm
4 layers144 × 127 mm
Frothfet
hoeken/frothfet14Yarrboard load controller board with current sense, volt sense, fuses, and sender support.
- Size
- 144 × 127 mm
- Copper layers
- 4
- Thickness
- 1.62 mm
- Parts
- 394
- Nets
- 170
- Pads
- 1,158
- Tracks, vias
- 1,693, 1,096
- Pours
- 49
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 16 Aug 2024
- Updated
- 5 May 2026
Overview
Frothfet is an open-source printed circuit board by hoeken, from the hoeken/frothfet repository on GitHub, published under the GPL-3.0 licence. It is a 4-layer board of 144 × 127 mm with 394 parts on 170 nets, routed with 1,693 tracks and 1,096 vias.
It is built around the 74LVC541AD, ESP32-S3-WROOM-1-N16R8 and SN74LV1T34DBV, with the LM75BD, RT7272BGSP and LM74502HDDF among its other parts. Its parts include 76 capacitors, 74 resistors, 48 diodes, 33 ICs and 26 fuses. It belongs with the ESP32 boards of this library.
Main components
12
74LVC541AD
SO-20-300mil-40℃~+125℃ 1 1.2V~3.6V 2.9ns@3.3V,50pF 24mA 24mA 40uA 74LVC 8 Schmitt trigger Tri-State Unidirectional SO-20-300mil Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffer/Driver/Transceiver
ESP32-S3-WROOM-1-N16R8
SMD,25.5x18mm-103.5dBm -40℃~+65℃ 2.4GHz 20.5dBm 355mA 3V~3.6V 95mA ESP32-S3R8 On-board PCB Antenna UART、SPI、I2C、GPIO、I2S、USB SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
SN74LV1T34DBV
SOT-23-5-40℃~+125℃ 1 1 1.6V~5.5V 10uA 5.5ns@5V,15pF 74LV 8mA 8mA Level shifting Push-pull Unidirectional SOT-23-5 Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffers, Drivers, Receivers, Transceivers
LM75BD
SOIC-8-55℃~+125℃ 10ms 11bit 1uA 2.8V~5.5V I2C ±2℃ SOIC-8 Temperature Sensors ROHSNXP SemiconductorsTemperature Sensors
RT7272BGSP
SOIC-8-EP-40℃~+125℃ 1 3A 4.5V~36V 500kHz 800mV~30V 900uA Adjustable Buck Buck Built-in Yes SOIC-8-EP DC-DC Converters ROHSRICHTEKDC-DC Converters
LM74502HDDF
SOT-23-8-THIN-40℃~+125℃ 3.2V~65V Active High High Side Switch Over Voltage Protection SOT-23-8-THIN Power Distribution Switches ROHSTexas InstrumentsPower Distribution Switches
LDL1117S33R
SOT-223-4-40℃~+125℃@(Tj) 1 1.2A 18V 3.3V 500uA 600mV@(1.2A) 60uVrms 87dB@(120Hz) Fixed Over Current Protection、Thermal Shutdown Positive SOT-223-4 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSSTMicroelectronicsVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsMAX40200AUK
SOT23-5Ultra-Tiny Micropower, 1A Ideal Diode with Ultra-Low Voltage DropMaxim Integrated (Analog Devices)UncategorisedTPS7A2033PDBVR-TP
SOT-23-5-40℃~+85℃ 1 180uV@(300mA) 2uA 3.3V 300mA 5.5V 75dB@(1kHz) Fixed Over Current Protection、Enable、Thermal Shutdown Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTECH PUBLICUncategorised
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)T507
插件插件 Fuseholders ROHSXFCNFuseholders
SS54
SMA(DO-214AC)-55℃~+125℃ 1mA@40V 40V 550mV@5A 5A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
README
README.mdThis is the hardware design repository for FrothFET.
For detailed documentation, please visit the FrothFET documentation.
Parts
394| Qty | Value | Footprint | References |
|---|---|---|---|
| 57 | TestPoint | TestPoint:TestPoint_Pad_D1.5mm | TP38, TP39, TP41, TP42, TP43, TP44, TP45, TP47, TP48, TP49, TP50, TP51, TP52, TP53, TP54, TP55 +41 |
| 49 | 100nF | Capacitor_SMD:C_0603_1608Metric | C1, C2, C10, C11, C12, C13, C14, C16, C17, C18, C19, C20, C22, C23, C24, C25 +33 |
| 41 | ~ | yarrboard:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP1, TP2, TP10, TP11, TP12, TP13, TP14, TP15, TP16, TP17, TP18, TP19, TP20, TP21, TP22, TP23 +25 |
| 24 | T507 | yarrboard:XFCN T507 | F42, F43, F44, F45, F46, F47, F48, F49, F50, F51, F52, F53, F54, F55, F56, F57 +8 |
| 22 | 10k | Resistor_SMD:R_0603_1608Metric | R3, R10, R11, R15, R16, R20, R21, R25, R26, R30, R31, R35, R36, R40, R41, R45 +6 |
| 16 | 4.7R 1% | Resistor_SMD:R_0603_1608Metric | R8, R9, R13, R14, R18, R19, R23, R24, R28, R29, R33, R34, R38, R39, R43, R44 |
| 10 | SS54 | Diode_SMD:D_SMA | D2, D6, D10, D14, D18, D22, D26, D30, D36, D38 |
| 9 | WS2812B-Mini | LED_SMD:LED_WS2812B-Mini_PLCC4_3.5x3.5mm | D4, D8, D12, D16, D20, D24, D28, D32, D47 |
| 8 | 0R | Resistor_SMD:R_0603_1608Metric | R4, R5, R53, R54, R57, R61, R62, R63 |
| 8 | 2 mOhm | Resistor_SMD:R_4020_10251Metric | R7, R12, R17, R22, R27, R32, R37, R42 |
| 8 | 20A | yarrboard:ATC Fuse | ATC1, F4, F8, F12, F16, F20, F24, F28 |
| 8 | 220nF | Capacitor_SMD:C_0603_1608Metric | C3, C9, C15, C21, C27, C33, C39, C45 |
| 8 | BSC010N04LS | yarrboard:Infineon_PG-TDSON-8_6.15x5.15mm | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 |
| 8 | BZT52C20S | Diode_SMD:D_SOD-323 | D1, D5, D9, D13, D17, D21, D25, D29 |
| 8 | INA226 | Package_SO:VSSOP-10_3x3mm_P0.5mm | U3, U6, U9, U12, U15, U18, U21, U24 |
| 8 | LM74502H | yarrboard:SOT-23-8 | U2, U5, U8, U11, U14, U17, U20, U23 |
| 8 | LM75BD | Package_SO:MSOP-8_3x3mm_P0.65mm | U4, U7, U10, U13, U16, U19, U22, U25 |
| 8 | SMAJ30CA | Diode_SMD:D_SMA | D3, D7, D11, D15, D19, D23, D27, D31 |
| 5 | 100R | Resistor_SMD:R_0603_1608Metric | R46, R49, R59, R66, R69 |
| 5 | PESD3V3L1BA | Diode_SMD:D_SOD-323 | D33, D34, D39, D45, D48 |
| 4 | 100k | Resistor_SMD:R_0603_1608Metric | R47, R50, R52, R60 |
| 4 | 1uF | Capacitor_SMD:C_0603_1608Metric | C50, C64, C66, C71 |
| 4 | ~ | yarrboard:SMTSO30XXX | H1, H2, H3, H4 |
| 3 | 100uF / 6.3v | Capacitor_SMD:C_1206_3216Metric | C68, C69, C72 |
| 3 | 5.1k | Resistor_SMD:R_0603_1608Metric | R64, R65, R68 |
| 3 | AO3400A | Package_TO_SOT_SMD:SOT-23 | Q9, Q10, Q11 |
| 3 | GREEN | LED_SMD:LED_0603_1608Metric | D35, D43, D46 |
| 2 | 10uF | Capacitor_SMD:C_1210_3225Metric | C56, C57 |
| 2 | 2.2k | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | 22uF | Capacitor_SMD:C_1206_3216Metric | C74, C75 |
| 2 | Fan_Tacho | Connector:FanPinHeader_1x03_P2.54mm_Vertical | M1, M2 |
| 2 | ~ | Button_Switch_SMD:SW_SPST_B3U-1000P | SW1, SW2 |
| 1 | 1.5A | Fuse:Fuse_1206_3216Metric | FB2 |
| 1 | 100uF/50v | Capacitor_SMD:CP_Elec_6.3x7.7 | C54 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C55 |
| 1 | 10uF | Capacitor_SMD:C_0603_1608Metric | C58 |
| 1 | 11.8k 1% | Resistor_SMD:R_0603_1608Metric | R73 |
| 1 | 1N4148W | Diode_SMD:D_SOD-123 | D41 |
| 1 | 1nF | Capacitor_SMD:C_0402_1005Metric | C52 |
| 1 | 2.7nF | Capacitor_SMD:C_0603_1608Metric | C73 |
| 1 | 220uF / 16v | Capacitor_SMD:CP_Elec_6.3x5.4 | C77 |
| 1 | 22K 0.1% | Resistor_SMD:R_0603_1608Metric | R56 |
| 1 | 22uF | Capacitor_SMD:C_0603_1608Metric | C62 |
| 1 | 24k | Resistor_SMD:R_0603_1608Metric | R71 |
| 1 | 300K 0.1% | Resistor_SMD:R_0603_1608Metric | R55 |
| 1 | 4.7uF | Capacitor_SMD:C_0603_1608Metric | C67 |
| 1 | 500mA | Fuse:Fuse_1812_4532Metric | F32 |
| 1 | 6.8uH | Inductor_SMD:L_Chilisin_BMRA00050530 | L1 |
| 1 | 62k 1% | Resistor_SMD:R_0603_1608Metric | R72 |
| 1 | 74LVC541A | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U1 |
| 1 | 82k 1% | Resistor_SMD:R_0603_1608Metric | R58 |
| 1 | BAV199 | Package_TO_SOT_SMD:SOT-23 | D40 |
| 1 | BLM18AG121SN1D | Inductor_SMD:L_0603_1608Metric | FB1 |
| 1 | Buzzer | yarrboard:Buzzer_FUET_9.6x9.6 | BZ1 |
| 1 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical_SMD_Pin1Left | J5 |
| 1 | Conn_01x04_MountingPin | yarrboard:JST_SH_BM04B-SRSS-TB_1x04-1MP_P1.00mm_Vertical | J1 |
| 1 | ESP32-S3-WROOM-1-N16R8 | yarrboard:ESP32-S3-WROOM-1 | U30 |
| 1 | LDL1117S33R | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U32 |
| 1 | Logo_Open_Hardware_Small | Symbol:OSHW-Logo2_7.3x6mm_SilkScreen | LOGO2 |
| 1 | Logo_Open_Hardware_Small | yarrboard:Logo Small | LOGO1 |
| 1 | MAX40200AUK | Package_TO_SOT_SMD:SOT-23-5 | U29 |
| 1 | MCP3425A0T-ECH | Package_TO_SOT_SMD:SOT-23-6 | U28 |
| 1 | RT7272BGSP | yarrboard:SOIC-8_L5.0-W4.0-P1.27-LS6.0-BL-EP2.0 | U27 |
| 1 | SMAJ5.0A | Diode_SMD:D_SMA | D44 |
| 1 | SMBJ30CA | Diode_SMD:D_SMB | D37 |
| 1 | SN74LV1T34DBV | Package_TO_SOT_SMD:SOT-23-5 | U33 |
| 1 | SS34 | Diode_SMD:D_SMA | D42 |
| 1 | Screw_Terminal_01x08 | yarrboard:Frothfet Busbar Positive Rev E | J2 |
| 1 | Screw_Terminal_01x08 | yarrboard:Frothfet Busbar Negative Rev E | J3 |
| 1 | Screw_Terminal_01x08 | yarrboard:KF78S-13.0-8P | LOADS1 |
| 1 | TPS7A2033PDBVR | Package_TO_SOT_SMD:SOT-23-5 | U26 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U31 |
| 1 | USB_TYPE_C_16PIN | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J4 |
| 1 | mSMD150 | yarrboard:Fuse_1812_4532Metric | F33 |
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Questions
How big is the Frothfet PCB?
It measures 144 × 127 mm and has 4 copper layers, 1.62 mm thick.
What parts does the Frothfet use?
394 parts, built around the 74LVC541AD, ESP32-S3-WROOM-1-N16R8, SN74LV1T34DBV and LM75BD. 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 Frothfet KiCad files?
From the hoeken/frothfet repository on GitHub, at the commit this page was made from: the board is frothfet/frothfet.kicad_pcb and its schematic frothfet/esp32-s3.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Frothfet design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).