# Above Violet R2-D2 ## Description Compact 2S Li-ion charger for Sony NP-FZ100 battery using DC input, 8.4 V CC/CV charging, automatic termination, reverse polarity, overvoltage, overcurrent, and thermal protection, with defined B+ and B- battery outputs and PCB-buildable component choices. ## Project Details - **Owner:** maheshsai123 - **Created:** 3/26/2026 - **Last Updated:** 3/26/2026 - **Visibility:** Public - **System Architecture:** flowchart TD A[DC Input 9V to 12V] --> B[Input Protection] B --> C[TP5100 2S Charger] C --> D[Battery Connector Bplus Bminus] C --> E[Charge Status LEDs] D --> F[NP-FZ100 2S Pack] F --> G[NTC Temperature Sense] G --> C subgraph B1 [Input Protection] B2[PTC Fuse] B3[TVS Clamp] B4[P-FET Reverse Protection] end B --> B2 B --> B3 B --> B4 - **Power Requirements:** DC input 9V to 12V nominal, 2S Li-ion battery charge target 8.4V CV, battery nominal 7.2V, default charge current 1A - **Implementation Details:** Switching 2S charger with automatic termination at C/10, input fuse, reverse polarity PFET, TVS clamp, thermal sensing via 10k NTC, and defined B+ / B- battery connector - **Operating Voltage:** Input 9V to 12V DC; battery 6.0V to 8.4V ## Key Components ### D1 — [SMBJ12A-13-F](https://www.flux.ai/lcsc/smbj12a-13-f.md) - Product Info Url: https://lcsc.com/product-detail/TVS_DIODES_SMBJ12A-13-F_SMBJ12A-13-F_C135038.html - Package: SMB - Package or Case Code: SMB_L4.6-W3.6-LS5.3-RD - Role: TVS Protection - Role Details: Clamp DC input transients on protected input rail - JLCPCB Part Class: Extended Part - Manufacturer Name: DIODES(美台) - Manufacturer Part Number: SMBJ12A-13-F - LCSC Part Number: C135038 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Diodes-Incorporated-SMBJ12A-13-F_C135038.pdf - Part Type: TVS **Pins:** - A [pin 2] - K [pin 1] ### D2 — [SS34FA](https://www.flux.ai/adrian95/ss34fa.md) - Datasheet URL: https://www.onsemi.com/pdf/datasheet/ss36fa-d.pdf - Role Details: Freewheel diode for TP5100 buck charging stage - Manufacturer Part Number: SS34FA - Part Type: Diode - Package: SOD-123FA - Role: Schottky Rectifier - Manufacturer Name: onsemi - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - A [pin 2] - K [pin 1] ### F1 — [1206L110/16WR](https://www.flux.ai/adrian95/1206l11016wr.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: 1206L110/16WR - Datasheet URL: https://www.littelfuse.com/assetdocs/littelfuse-ptc-1206l-datasheet?assetguid=2b6a1515-d4ee-4c83-8bd4-152b4901b8f5 - Manufacturer Name: Littelfuse Inc. - Role: PTC Fuse - Package: 1206 - Role Details: Input overcurrent protection, about 1.1A hold - Part Type: Fuse **Pins:** - P1 [pin 1] - P2 [pin 2] ### J1 — [PJ-037A](https://www.flux.ai/vasy_skral/pj-037a.md) - Manufacturer Part Number: PJ-037A - Role: Power Input Connector - Manufacturer Name: CUI Devices - Part Type: Connector - Package: Through Hole - Datasheet URL: https://www.cuidevices.com/product/resource/pj-037a.pdf - Role Details: 9V to 12V DC barrel jack input for charger **Pins:** - Center pin [pin 1] - Terminal [pin 2] ### J2 — [JST B2B PH K 01x02 Connector](https://www.flux.ai/jharwinbarrozo/jst-b2b-ph-k-01x02-connector.md) - Part Type: Connector - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Manufacturer Name: JST Sales America - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - Package: Through Hole - Role: Battery Connector - Role Details: B+ and B- connector for Sony NP-FZ100 2S battery leads **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### LED1 — [LTST-C190KRKT](https://www.flux.ai/adrian95/ltst-c190krkt.md) - Role: Status LED - Datasheet URL: https://optoelectronics.liteon.com/upload/download/DS-22-99-0151/LTST-C190KRKT.pdf - Package: 0603 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: LTST-C190KRKT - Role Details: Red charging indicator from CHRG open-drain output - Part Type: LED - Manufacturer Name: Lite-On Inc. **Pins:** - A [pin 2] - K [pin 1] ### LED2 — [LTST-C190GKT](https://www.flux.ai/adrian95/ltst-c190gkt.md) - Role Details: Green standby indicator from STDBY open-drain output - Role: Status LED - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Lite-On%20PDFs/LTST-C190AKT.pdf - Package: 0603 - Manufacturer Name: Lite-On Inc. - Part Type: LED - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: LTST-C190GKT **Pins:** - A [pin 2] - K [pin 1] ### Q1 — [DMP3098L-7](https://www.flux.ai/jecstronic/dmp3098l-7.md) - Manufacturer Part Number: DMP3098L-7 - Role Details: High-side P-channel MOSFET ideal-diode style reverse input protection - License: https://creativecommons.org/licenses/by/4.0/ - Package: SOT-23-3 - Role: Reverse Polarity Protection - Datasheet URL: https://www.diodes.com/assets/Datasheets/ds31447.pdf - Part Type: Transistor - Manufacturer Name: Diodes Incorporated **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### U1 — [TP5100](https://www.flux.ai/lcsc/tp5100.md) - Product Info Url: https://lcsc.com/product-detail/_Nanjing-Extension-Microelectronics-TP5100_C379389.html - Role: 2S Charger IC - Part Type: Battery Management ICs - Manufacturer Part Number: TP5100 - Role Details: 8.4V dual-cell lithium charger with C/10 termination and thermal regulation - Frequency: 400kHz - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2306251137_TOPPOWER-Nanjing-Extension-Microelectronics-TP5100_C379389.pdf - Manufacturer Name: TOPPOWER(南京拓微) - Package: SOP-16 - Package or Case Code: TQFN-16_L4.0-W4.0-P0.65-BL-EP - Charging Current: 0.1A to 2A - JLCPCB Part Class: Extended Part - LCSC Part Number: C379389 **Pins:** - ~{CHRG} [pin 15] - ~{STDBY} [pin 14] - BAT [pin 9] - CS [pin 13] - EP [pin 17] - GND [pin 7] - LX [pin 2] - LX [pin 3] - PWR_ON- [pin 6] - RTRICK [pin 12] - TS [pin 11] - VIN [pin 16] - VIN [pin 5] - VIN [pin 1] - VIN [pin 4] - VREG [pin 10] - VS [pin 8] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/maheshsai123/above-violet-r2-d2](https://www.flux.ai/maheshsai123/above-violet-r2-d2).* --- *Generated from [https://www.flux.ai/maheshsai123/above-violet-r2-d2](https://www.flux.ai/maheshsai123/above-violet-r2-d2)*