# Hard Teal Transporter ## Description USB‑C 9–15 V PD to 7.4 V / 5 A Servo Supply with Integrated 1 Mbps USB‑UART and Comprehensive Protection ## Project Details - **Owner:** jimsy - **Created:** 1/18/2026 - **Last Updated:** 1/18/2026 - **Visibility:** Public - **System Architecture:** ```mermaid flowchart TD subgraph power_path [Power Path] usb_pd_in[USB-C PD Input Port] pd_ctrl[PD Controller] fuse[Fuse / OCP] tvs_in[Input TVS] rev_prot[Reverse Polarity / Protection Switch] buck[Buck Converter 7.4V 5A] rail_7v4[7.4V Rail] servo_conn[3-pin Servo Connector\nSIG / 7.4V / GND] usb_pd_in --> pd_ctrl pd_ctrl --> fuse fuse --> tvs_in tvs_in --> rev_prot rev_prot --> buck buck --> rail_7v4 rail_7v4 --> servo_conn end subgraph data_path [Data Path] usb_data[USB-C Data Port] esd_usb[USB ESD Protection] uart_ic[USB-UART Bridge 3.3V 1Mbps] sw_bus[3.3V Single-Wire Half-Duplex Servo Bus] uart_hdr[4-pin Host UART Header\nTX / RX / 3V3 / GND] bypass_jmp[2-pin Bypass Jumper] usb_data --> esd_usb esd_usb --> uart_ic uart_ic --> sw_bus uart_ic --> bypass_jmp bypass_jmp --> uart_hdr end subgraph protections [Protections & Grounding] esd_servo[ESD on Servo Lines] tvs_7v4[TVS on 7.4V Rail] star_gnd[Star Grounding\nUSB Return vs Power Return] end servo_conn --> esd_servo rail_7v4 --> tvs_7v4 star_gnd --- usb_pd_in star_gnd --- usb_data star_gnd --- servo_conn star_gnd --- uart_hdr ``` - **BoardReviewStatus:** DRC airwire check completed, summary below ## Key Components ### D1 — [PESD5V2S2UT,215](https://www.flux.ai/adrian95/pesd5v2s2utc215~ngy.md) - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/PESDXS2UT_SERIES.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: PESD5V2S2UT,215 - Role Details: Input surge protection for VIN - Distributor Availability: Verical (3k–342k); Digi-Key (45k–347k); TME (3k); Arrow (5.4k–114k); Mouser (0); LCSC (50k) - Part Type: Diode - Lifecycle Status: Active - Role: Protection - Manufacturer Name: Nexperia USA Inc. **Pins:** - 1_CATHODE [pin 1] - 2_CATHODE [pin 2] - COMMON_ANODE [pin 3] ### D2 — [USBLC6-2P6](https://www.flux.ai/kicad-part-library/usblc6-2p6~djt.md) - Manufacturer Name: Texas Instruments Inc. - Package or Case Code: SOT-666 - Manufacturer Part Number: USBLC6-2P6 - Role: Protection - Role Details: ESD protection for USB-C D+ and D- lines - Lifecycle Status: Active - Datasheet URL: https://www.st.com/resource/en/datasheet/usblc6-2.pdf - Distributor Availability: Digi-Key (52k–54k); Verical (96–588k); Mouser (65k); LCSC (470–41k); Arrow (96–177k); TME (3k) **Pins:** - GND [pin 2] - I/O1 [pin 6] - I/O1 [pin 1] - I/O2 [pin 3] - I/O2 [pin 4] - VBUS [pin 5] ### D3 — [TPD3E001DRLR](https://www.flux.ai/kicad-part-library/tpd3e001drlr~6l.md) - Lifecycle Status: Active - Distributor Availability: Digi-Key (12k–36k); Verical (685–8k); Arrow (0–4k); LCSC (750); TME (1k); Mouser (5.5k) - Manufacturer Part Number: TPD3E001DRLR - Package or Case Code: SOT-553 - Role: Protection - Datasheet URL: http://www.ti.com/lit/ds/symlink/tpd3e001.pdf - Manufacturer Name: Texas Instruments Inc. - Role Details: ESD protection for UART TX and RX lines **Pins:** - ~ [pin 5] - ~ [pin 3] - IO1 [pin 1] - IO2 [pin 2] - IO3 [pin 4] ### F1 — [A30-600](https://www.flux.ai/lcsc/a30-600~9bw.md) - Distributor Availability: LCSC (1.1k) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010303_Shenzhen-JDT-Fuse-A30-600_C135417.pdf - Manufacturer Part Number: A30-600 - Role Details: Input overcurrent protection - Part Type: Resettable Fuses - Package or Case Code: FUSE-TH_L16.5-W3.0-P10.20-D1.2-S1.2 - Manufacturer Name: JDTfuse(集电通) - LCSC Part Number: C135417 - Role: Current Limiting - Product Info Url: https://lcsc.com/product-detail/PTC-Fuse_6A-Self-recovery_C135417.html - JLCPCB Part Class: Extended Part - Lifecycle Status: Unknown **Pins:** - 1 [pin 1] - 2 [pin 2] ### J1 — [632723130112](https://www.flux.ai/adrian95/632723130112~90z.md) - Lifecycle Status: Active - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.we-online.com/components/products/datasheet/632723130112.pdf - Manufacturer Name: Würth Elektronik - Part Type: Connector - Role: Connector - Role Details: Power input USB-C PD port - Manufacturer Part Number: 632723130112 - Distributor Availability: Digi-Key (2.4k); Verical (35); Mouser (3.7k) **Pins:** - ~ [pin S3] - ~ [pin S2] - ~ [pin S4] - ~ [pin S1] - CC [pin A5] - DN1 [pin A7] - DN2 [pin B7] - DP1 [pin A6] - DP2 [pin B6] - GND [pin A1] - GND1 [pin A12] - GND2 [pin B1] - GND3 [pin B12] - SBU1 [pin A8] - SBU2 [pin B8] - SSRXN1 [pin B10] - SSRXN2 [pin A10] - SSRXP1 [pin B11] - SSRXP2 [pin A11] - SSTXN1 [pin A3] - SSTXN2 [pin B3] - SSTXP1 [pin A2] - SSTXP2 [pin B2] - VBUS [pin A4] - VBUS1 [pin A9] - VBUS2 [pin B4] - VBUS3 [pin B9] - VCONN [pin B5] ### J2 — [2024100002](https://www.flux.ai/adrian95/2024100002~atk.md) - Role: Connector - Lifecycle Status: Active - Role Details: USB-C data port - Part Type: Connector - Distributor Availability: Arrow (0–9.8k); Digi-Key (12k); LCSC (1.6k); Verical (96–21k) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Molex - Manufacturer Part Number: 2024100002 - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/834/202410002_Pkg_Spec.pdf **Pins:** - CC1 [pin A5] - CC2 [pin B5] - DA- [pin A7] - DA+ [pin A6] - DB- [pin B7] - DB+ [pin B6] - GND1 [pin A1] - GND2 [pin A12] - GND3 [pin B1] - GND4 [pin B12] - RX1- [pin B10] - RX1+ [pin B11] - RX2- [pin A10] - RX2+ [pin A11] - SBU1 [pin A8] - SBU2 [pin B8] - SHIELD1 [pin SH1] - SHIELD2 [pin SH2] - SHIELD3 [pin SH3] - SHIELD4 [pin SH4] - TX1- [pin A3] - TX1+ [pin A2] - TX2- [pin B3] - TX2+ [pin B2] - VBUS1 [pin A4] - VBUS2 [pin A9] - VBUS3 [pin B4] - VBUS4 [pin B9] ### J3 — [825433-3](https://www.flux.ai/lcsc/825433-3~ct7h.md) - Manufacturer Part Number: 825433-3 - Distributor Availability: LCSC (524); Arrow (0–13k); Verical (28–76k); Mouser (12k); TME (0) - Package or Case Code: HDR-TH_3P-P2.54-V-M - Role Details: Servo connector (SIG / 7.4V / GND) - Manufacturer Name: TE Connectivity(泰科电子) - Role: Connector - JLCPCB Part Class: Extended Part - LCSC Part Number: C306148 - Lifecycle Status: Active - Part Type: Pin Headers - Product Info Url: https://lcsc.com/product-detail/Others_TE-Connectivity_825433-3_TE-Connectivity-825433-3_C306148.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1811151650_TE-Connectivity-825433-3_C306148.pdf **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### J4 — [61300411121](https://www.flux.ai/adrian95/61300411121~pw9.md) - Role Details: UART header (TX / RX / 3V3 / GND) - Lifecycle Status: Active - Role: Connector - Manufacturer Part Number: 61300411121 - License: https://creativecommons.org/licenses/by/4.0/ - Package or Case Code: HDRV4W95P0X254_1X4_1016X254X854P - Manufacturer Name: Wurth Elektronik - Distributor Availability: LCSC (0); Digi-Key (39k); Mouser (34k) - Datasheet URL: https://www.we-online.com/components/products/datasheet/61300411121.pdf - Part Type: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### J5 — [382811-8](https://www.flux.ai/adrian95/382811-8~gvo.md) - Role Details: Bypass jumper - Part Type: Connector - Distributor Availability: Verical (1k–287k); Digi-Key (148k); Arrow (1k–34k); LCSC (645); Mouser (23k) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: TE Connectivity AMP Connectors - Lifecycle Status: Active - Role: Connector - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=382811&DocType=Customer+Drawing&DocLang=English - Manufacturer Part Number: 382811-8 **Pins:** - 1 [pin 1] - 2 [pin 2] ### U1 — [STUSB4500QTR](https://www.flux.ai/kicad-part-library/stusb4500qtr~tgl.md) - Manufacturer Part Number: STUSB4500QTR - Role: Power Management - Package: QFN-24 - Role Details: USB-C PD sink controller negotiating 9–15 V input - Datasheet URL: https://www.st.com/resource/en/datasheet/stusb4500.pdf - Package or Case Code: QFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm - Distributor Availability: Arrow (3.8k–41k); Digi-Key (12k–15k); LCSC (2.6k); Verical (1.4k–80k); Mouser (15k) - Lifecycle Status: Active **Pins:** - A_B_SIDE [pin 17] - ADDR0 [pin 12] - ADDR1 [pin 13] - ALERT [pin 19] - ATTACH [pin 11] - CC1 [pin 2] - CC1DB [pin 1] - CC2 [pin 4] - CC2DB [pin 5] - DISCH [pin 9] - GND [pin 25] - GND [pin 10] - GPIO [pin 15] - NC [pin 3] - POWER_OK2 [pin 20] - POWER_OK3 [pin 14] - RESET [pin 6] - SCL [pin 7] - SDA [pin 8] - VBUS_EN_SNK [pin 16] - VBUS_VS_DISCH [pin 18] - VDD [pin 24] - VREG_1V2 [pin 21] - VREG_2V7 [pin 23] - VSYS [pin 22] ### U2 — [NB685AGQ-P](https://www.flux.ai/monolithicpower/nb685agq-p~xr5.md) - Product Info Url: https://www.monolithicpower.com/en/catalog/product/view/id/1053?utm_source=ultralibrarian&utm_medium=component_search&utm_campaign=listing - Lifecycle Status: Restricted Availability - Role: Power Conversion - Manufacturer Part Number: NB685AGQ-P - Manufacturer Name: Monolithic Power Systems - Package or Case Code: QFN-16_NB685A_MNP - Datasheet URL: https://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/NB685A - Product Image Url: https://www.monolithicpower.com/pub/media/catalog/product/N/B/NB685A_1053_1.jpg - Role Details: Synchronous buck converter generating 7.4 V at 5 A - Distributor Availability: Mouser (Stock N/A) **Pins:** - 3V3 [pin 3] - AGND [pin 4] - BST [pin 10] - EN1 [pin 16] - EN2 [pin 15] - FB [pin 13] - MODE [pin 14] - OTW# [pin 11] - PG [pin 12] - PGND [pin 2] - SW [pin 9] - VDDQ [pin 6] - VIN [pin 1] - VTT [pin 5] - VTTREF [pin 7] - VTTS [pin 8] ### U3 — [FT230XS-R](https://www.flux.ai/adrian95/ft230xs-r~oy.md) - Part Type: Integrated Circuit - Manufacturer Part Number: FT230XS-R - Distributor Availability: Digi-Key (26k); Mouser (0); LCSC (0) - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: USB to UART bridge, 1 Mbps - Package: SSOP-16 - Lifecycle Status: Active - Manufacturer Name: FTDI, Future Technology Devices International Ltd - Datasheet URL: http://www.ftdichip.com/Support/Documents/DataSheets/ICs/DS_FT230X.pdf **Pins:** - ~CTS [pin 6] - ~RESET [pin 11] - ~RTS [pin 2] - 3V3OUT [pin 10] - CBUS0 [pin 15] - CBUS1 [pin 14] - CBUS2 [pin 7] - CBUS3 [pin 16] - GND [pin 5] - GND [pin 13] - RXD [pin 4] - TXD [pin 1] - USBDM [pin 9] - USBDP [pin 8] - VCC [pin 12] - VCCIO [pin 3] ### U4 — [MCP2050-330-EMQ](https://www.flux.ai/kicad-part-library/mcp2050-330-emq~kg.md) - Lifecycle Status: Unknown - Distributor Availability: None found - Datasheet URL: http://ww1.microchip.com/downloads/en/DeviceDoc/22299B.pdf - Package: QFN-20 - Package or Case Code: QFN-20-1EP_5x5mm_P0.65mm_EP3.35x3.35mm - Manufacturer Part Number: MCP2050-330-EMQ - Manufacturer Name: Microchip Technology Inc. - Role Details: 3.3 V single-wire half-duplex transceiver for servo bus **Pins:** - ~{RESET} [pin 5] - ~{WWDTRESET} [pin 17] - ~{WWDTTRIG} [pin 15] - CS/LWAKE [pin 2] - FAULT/TXE [pin 13] - LBUS [pin 7] - NC [pin 16] - NC [pin 6] - NC [pin 11] - NC [pin 9] - NC [pin 10] - NC [pin 19] - NC [pin 20] - PAD [pin 21] - RXD [pin 1] - TXD [pin 4] - VBAT_RATIO [pin 18] - VBB [pin 12] - VREG [pin 3] - VSS [pin 8] - WWDTSELECT [pin 14] ### U5 — [MPQ5850GJ-AEC1-Z](https://www.flux.ai/monolithicpower/mpq5850gj-aec1-z~x87.md) - Role Details: Reverse polarity and overcurrent protection - Datasheet URL: https://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/MPQ5850GJ-AEC1 - Manufacturer Part Number: MPQ5850GJ-AEC1-Z - Distributor Availability: Arrow (0); Mouser (10); Digi-Key (0) - Package or Case Code: TSOT23-8_MPQ5850_MNP - Manufacturer Name: Monolithic Power Systems - Lifecycle Status: Active - Product Image Url: https://www.monolithicpower.com/pub/media/catalog/product/m/p/mpq5850-aec1_tac.jpg - Role: Protection - Product Info Url: https://www.monolithicpower.com/en/catalog/product/view/id/4116?utm_source=ultralibrarian&utm_medium=component_search&utm_campaign=listing **Pins:** - DRAIN [pin 6] - EN/UVLO [pin 1] - GATE [pin 7] - GND [pin 3] - PG [pin 2] - RES [pin 5] - SOURCE [pin 8] - SW [pin 4] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/jimsy/hard-teal-transporter~lw](https://www.flux.ai/jimsy/hard-teal-transporter~lw).* --- *Generated from [https://www.flux.ai/jimsy/hard-teal-transporter~lw](https://www.flux.ai/jimsy/hard-teal-transporter~lw)*