4 layers18.5 × 28 mm
4 layers45 × 51 mm
Left main
Scaniox/headphones- Size
- 45 × 51 mm
- Copper layers
- 4
- Thickness
- 0.8 mm
- Parts
- 89
- Nets
- 163
- Pads
- 458
- Tracks, vias
- 902, 161
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 6 Apr 2023
- Updated
- 12 Apr 2024
Overview
Left main is an open-source printed circuit board by Scaniox, from the Scaniox/headphones repository on GitHub. It is a 4-layer board of 45 × 51 mm with 89 parts on 163 nets, routed with 902 tracks and 161 vias.
It is built around the AS3435-EQFM, AP22814AW5 and MAX17048G+T10, with the MCP73831T-2ACI/OT-HXY and MBR120 among its other parts. Its parts include 31 capacitors, 23 connectors, 21 resistors, 10 ICs and 2 diodes. It belongs with the SAM D and SAM boards of this library.
Main components
5
AS3435-EQFM
QFN-36(5x5)-20℃~+85℃ 0.1% 100dB 121dB 1A 1V~1.8V 2-Channel 24mWx2@32Ω Automatic mute/no-noise switch、Enable/shutdown function、ESD protection、Digitally programmable gain、Built-in audio processing、Automatic power-saving mode QFN-36(5x5) Audio Amplifiers ROHSAdvanced Monolithic SystemsAudio Amplifiers
AP22814AW5
SOT-25-40℃~+85℃ 1 2.7V~5.5V 3A 50mΩ Active High、Active Low High Side Switch Output discharge function、Soft-start、Under-voltage lockout、Reverse voltage protection、Overcurrent Protection、Over temperature protection、Short-Circuit Protection、Reverse current blocking SOT-25 Power Distribution Switches ROHSDiodes IncorporatedPower Distribution Switches
MAX17048G+T10
DFN-8-EP(2x2)-40℃~+85℃ 1 2.5V~4.5V 3uA I2C Lithium Battery Not supported Not supported DFN-8-EP(2x2) Battery Management ROHSMaxim Integrated (Analog Devices)Battery ManagementMCP73831T-2ACI/OT-HXY
SOT-23-5LBattery ManagementHXY MOSFET
MBR120
SOD-123Schottky DiodesDoeshare
Parts
89| Qty | Value | Footprint | References |
|---|---|---|---|
| 19 | 10uF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C1, C6, C7, C10, C11, C12, C13, C15, C16, C47, C48, C49, C50, C52, C56, C58 +3 |
| 10 | right_side | TestPoint:TestPoint_Pad_D1.0mm | J9, J10, J11, J12, J13, J14, J15, J16, J17, J18 |
| 9 | 2.2k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R1, R8, R9, R10, R11, R43, R47, R49, R53 |
| 7 | 1uF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C2, C3, C17, C54, C75, C76, C77 |
| 6 | 10k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R6, R7, R42, R44, R74, R75 |
| 4 | ear_sensor | TestPoint:TestPoint_Pad_D1.0mm | J19, J20, J21, J22 |
| 3 | 100k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R2, R3, R5 |
| 2 | 22pF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C4, C5 |
| 2 | 470nF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C14, C43 |
| 2 | AP22814AW5 | Package_TO_SOT_SMD:SOT-23-5 | U7, U8 |
| 2 | AS3435-EQFM | as3435:QFN-36_EP_5.9x5.9_Pitch0.4mm | IC1, IC2 |
| 1 | 0.1uF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C78 |
| 1 | 200 | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R72 |
| 1 | 32.768KHz | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | 6.8K | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R4 |
| 1 | 68k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R73 |
| 1 | AP2127K-1.8 | Package_TO_SOT_SMD:SOT-23-5 | U6 |
| 1 | ATSAMD21G18_QFN | Package_DFN_QFN:TQFN-48-1EP_7x7mm_P0.5mm_EP5.1x5.1mm | U2 |
| 1 | BM83 | BM83:BM83 | U1 |
| 1 | FB_Filters | Connector_Hirose:Hirose_DF12_DF12E3.0-14DP-0.5V_2x07_P0.50mm_Vertical | J23 |
| 1 | FB_MIC_L_+ | TestPoint:TestPoint_Pad_D1.0mm | J5 |
| 1 | FB_MIC_L_- | TestPoint:TestPoint_Pad_D1.0mm | J6 |
| 1 | FF_Filters | Connector_Hirose:Hirose_DF12_DF12E3.0-14DP-0.5V_2x07_P0.50mm_Vertical | J24 |
| 1 | FF_MIC_L_+ | TestPoint:TestPoint_Pad_D1.0mm | J3 |
| 1 | FF_MIC_L_- | TestPoint:TestPoint_Pad_D1.0mm | J4 |
| 1 | HP_L_+ | TestPoint:TestPoint_Pad_D1.0mm | J7 |
| 1 | HP_L_- | TestPoint:TestPoint_Pad_D1.0mm | J8 |
| 1 | MAX17048G+T10 | MAX17048G+T10:21-0168E_T822-3_MXM | U5 |
| 1 | MBR120 | Diode_SMD:D_SOD-123 | D2 |
| 1 | MCP73831T-2ACI/OT | Package_TO_SOT_SMD:SOT-23-5 | U3 |
| 1 | RED | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | SPX3819-3.3 | Package_TO_SOT_SMD:SOT-23-5 | U4 |
| 1 | connectors_board | SFV18R-1STE1LF:CON18_1X18_DR_SFV_GLE | J1 |
| 1 | reset_button | Button_Switch_SMD:SW_Push_1P1T_NO_CK_KMR2 | SW2 |
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Questions
How big is the Left main PCB?
It measures 45 × 51 mm and has 4 copper layers, 0.8 mm thick.
What parts does the Left main use?
89 parts, built around the AS3435-EQFM, AP22814AW5, MAX17048G+T10 and MCP73831T-2ACI/OT-HXY. 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 Left main KiCad files?
From the Scaniox/headphones repository on GitHub, at the commit this page was made from: the board is electronics/left_main/left_main.kicad_pcb and its schematic electronics/left_connectors/left_connectors.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Left main design in my own project?
Its repository states no licence, so its author keeps all rights: ask Scaniox before reusing the design.