# Big Emerald R2-D2 ## Description 12 V Automotive UPS-Style Supercapacitor Power Stabilizer ## Project Details - **Owner:** jeremyreth - **Created:** 1/6/2026 - **Last Updated:** 1/8/2026 - **Visibility:** Public - **Domain:** Automotive - **layer_count:** 2 - **copper_weight:** 2 oz - **License:** http://solderpad.org/licenses/SHL-2.1/ - **supercap_keepout:** 2 mm - **pour_width_L1:** 4 mm - **Operating Voltage:** 12V - **Part Type:** Power Management - **Role:** Power Filtering - **Role Details:** 12 V automotive supercapacitor-based UPS/stabilizer with input protection, ideal-diode ORing, bulk energy storage, and LC output filter. - **ground_plane_L2:** solid - **System Architecture:** ```mermaid flowchart TD InputTerminal["Input Terminal"] --> Fuse["7.5A Blade Fuse"] Fuse --> NTC["5Ω >15J NTC Thermistor"] NTC --> IdealDiode["LTC4357 + IPT015N10N5 Ideal-Diode Stage"] IdealDiode --> SupercapBank["6S1P Supercapacitor Bank\n(Eaton TV1625-3R0256-R x6)"] SupercapBank --> LCFilter["Output LC Filter\n(47µH Inductor, 220µF Electrolytic, 100nF Ceramic)"] LCFilter --> OutputTerminal["Output Terminal"] subgraph InputProtection ["Input Protection"] TVS["1.5KE18CA TVS Diode"] end InputTerminal --- TVS ``` - **Power Requirements:** Battery - **Manufacturing Quantity Target:** 10 ## Key Components ### D1 — [1.5KE18A A0G](https://www.flux.ai/lcsc/1p5ke18a-a0g~t2e3.md) - Part Type: TVS - Manufacturer Name: Taiwan Semiconductor(台湾半导体) - Role Details: Input TVS diode for surge clamp - Package or Case Code: DO-201_BD5.1-L9.0-P15.0-D1.0-RD - Role: Protection - Manufacturer Part Number: 1.5KE18A A0G - LCSC Part Number: C2624788 **Pins:** - A [pin 2] - C [pin 1] ### F1 — [0297030.WXNV](https://www.flux.ai/adrian95/0297030pwxnv~iwh.md) - Package or Case Code: 0297030WXNV - Role Details: Input Fuse - Role: Protection - Manufacturer Part Number: 0297030.WXNV - Datasheet URL: https://www.littelfuse.com//media/automotive/datasheets/fuses/passenger-car-and-commercial-vehicle/blade-fuses/littelfuse_mini_datasheet.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: LITTELFUSE - Part Type: 0297030.WXNV **Pins:** - ~ [pin 1] - ~ [pin 2] ### J1 — [2-Position Screw Terminal](https://www.flux.ai/corynrobinson/2-position-screw-terminal~s4.md) - Manufacturer Part Number: 691137710002 - Datasheet URL: https://www.we-online.com/katalog/datasheet/691137710002.pdf - Part Type: Connector - Role Details: Input Terminal - Role: Connector - Manufacturer Name: Würth Elektrik **Pins:** - P1 [pin 1] - P2 [pin 2] ### J2 — [2-Position Screw Terminal](https://www.flux.ai/corynrobinson/2-position-screw-terminal~s4.md) - Role Details: Output Terminal - Manufacturer Name: Würth Elektrik - Role: Connector - Manufacturer Part Number: 691137710002 - Datasheet URL: https://www.we-online.com/katalog/datasheet/691137710002.pdf - Part Type: Connector **Pins:** - P1 [pin 1] - P2 [pin 2] ### Q1 — [IPT015N10N5](https://www.flux.ai/lcsc/ipt015n10n5~d8b3.md) - JLCPCB Part Class: Extended Part - Package or Case Code: HSOF-8_L10.0-W10.5-P1.20 - Package: HSOF-8_L10.0-W10.5-P1.20 - Role: Switching - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1810010717_Infineon-Technologies-IPT015N10N5_C108964.pdf - LCSC Part Number: C108964 - Manufacturer Part Number: IPT015N10N5 - Manufacturer Name: Infineon(英飞凌) - Role Details: Ideal-diode MOSFET for reverse conduction control - Product Info Url: https://lcsc.com/product-detail/MOSFET_Infineon_IPT015N10N5ATMA1_IPT015N10N5ATMA1_C108964.html - Part Type: MOSFETs **Pins:** - D [pin 9] - G [pin 1] - S [pin 5] - S [pin 8] - S [pin 6] - S [pin 3] - S [pin 4] - S [pin 2] - S [pin 7] ### Rbal1 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Role: Voltage Division - Package: SMD_0805_2012Metric - Role Details: Balancing resistor for supercapacitor cell - Part Type: Resistor - Resistance: 1kΩ **Pins:** - P1 [pin 1] - P2 [pin 2] ### Rbal2 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Package: SMD_0805_2012Metric - Role Details: Balancing resistor for supercapacitor cell - Part Type: Resistor - Resistance: 1kΩ - Role: Voltage Division **Pins:** - P1 [pin 1] - P2 [pin 2] ### Rbal3 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Role Details: Balancing resistor for supercapacitor cell - Resistance: 1kΩ - Part Type: Resistor - Package: SMD_0805_2012Metric - Role: Voltage Division **Pins:** - P1 [pin 1] - P2 [pin 2] ### Rbal4 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Package: SMD_0805_2012Metric - Role Details: Balancing resistor for supercapacitor cell - Part Type: Resistor - Resistance: 1kΩ - Role: Voltage Division **Pins:** - P1 [pin 1] - P2 [pin 2] ### Rbal5 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Role Details: Balancing resistor for supercapacitor cell - Resistance: 1kΩ - Part Type: Resistor - Role: Voltage Division - Package: SMD_0805_2012Metric **Pins:** - P1 [pin 1] - P2 [pin 2] ### Rbal6 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Resistance: 1kΩ - Part Type: Resistor - Role: Voltage Division - Package: SMD_0805_2012Metric - Role Details: Balancing resistor for supercapacitor cell **Pins:** - P1 [pin 1] - P2 [pin 2] ### SC1 — [Generic Capacitor](https://www.flux.ai/jharwinbarrozo/generic-capacitor~1d.md) - Package: CP_Radial_D10.0mm_P5.00mm - Part Type: Non-Polarized Capacitor - Role: Energy Storage - Capacitance: 256F - Role Details: Placeholder for Eaton TV1625-3R0256-R supercapacitor cell in 6S1P bank **Pins:** - P1 [pin 1] - P2 [pin 2] ### SC2 — [Generic Capacitor](https://www.flux.ai/jharwinbarrozo/generic-capacitor~1d.md) - Capacitance: 256F - Package: CP_Radial_D10.0mm_P5.00mm - Role Details: Placeholder for Eaton TV1625-3R0256-R supercapacitor cell in 6S1P bank - Part Type: Non-Polarized Capacitor - Role: Energy Storage **Pins:** - P1 [pin 1] - P2 [pin 2] ### SC3 — [Generic Capacitor](https://www.flux.ai/jharwinbarrozo/generic-capacitor~1d.md) - Role Details: Placeholder for Eaton TV1625-3R0256-R supercapacitor cell in 6S1P bank - Part Type: Non-Polarized Capacitor - Package: CP_Radial_D10.0mm_P5.00mm - Capacitance: 256F - Role: Energy Storage **Pins:** - P1 [pin 1] - P2 [pin 2] ### SC4 — [Generic Capacitor](https://www.flux.ai/jharwinbarrozo/generic-capacitor~1d.md) - Part Type: Non-Polarized Capacitor - Package: CP_Radial_D10.0mm_P5.00mm - Role: Energy Storage - Role Details: Placeholder for Eaton TV1625-3R0256-R supercapacitor cell in 6S1P bank - Capacitance: 256F **Pins:** - P1 [pin 1] - P2 [pin 2] ### SC5 — [Generic Capacitor](https://www.flux.ai/jharwinbarrozo/generic-capacitor~1d.md) - Package: CP_Radial_D10.0mm_P5.00mm - Role: Energy Storage - Part Type: Non-Polarized Capacitor - Role Details: Placeholder for Eaton TV1625-3R0256-R supercapacitor cell in 6S1P bank - Capacitance: 256F **Pins:** - P1 [pin 1] - P2 [pin 2] ### SC6 — [Generic Capacitor](https://www.flux.ai/jharwinbarrozo/generic-capacitor~1d.md) - Role: Energy Storage - Part Type: Non-Polarized Capacitor - Package: CP_Radial_D10.0mm_P5.00mm - Role Details: Placeholder for Eaton TV1625-3R0256-R supercapacitor cell in 6S1P bank - Capacitance: 256F **Pins:** - P1 [pin 1] - P2 [pin 2] ### U1 — [LTC4357IMS8#PBF](https://www.flux.ai/adrian95/ltc4357ims8pbf~bwh.md) - Manufacturer Part Number: LTC4357IMS8#PBF - Role Details: Ideal-diode controller for reverse battery protection and ORing - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.analog.com/media/en/technical-documentation/data-sheets/4357fd.pdf - Package: MSOP-8_L3.0-W3.0-P0.65-LS5.0-BL - Role: Reverse Polarity Protection - Part Type: Integrated Circuit - Manufacturer Name: Analog Devices Inc. **Pins:** - GATE [pin 4] - GND [pin 5] - IN [pin 1] - NC [pin 6] - NC [pin 2] - NC [pin 3] - OUT [pin 8] - Vdd [pin 7] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/jeremyreth/big-emerald-r2-d2~yd](https://www.flux.ai/jeremyreth/big-emerald-r2-d2~yd).* --- *Generated from [https://www.flux.ai/jeremyreth/big-emerald-r2-d2~yd](https://www.flux.ai/jeremyreth/big-emerald-r2-d2~yd)*