# 12V Multi-Rail Power Section ## Description Power-section schematic for a 12V DC input generating +4V for a 4G module, +5V, and +3V3 rails with input TVS protection and regulator thermal notes. ## Project Details - **Owner:** akpatelak - **Created:** 7/9/2026 - **Last Updated:** 7/11/2026 - **Visibility:** Public - **Copies:** 2 ## Key Components ### D_CLAMP_I — [BAT54H,115](https://www.flux.ai/jecstronic/bat54hc115~nbk.md) - Manufacturer Part Number: BAT54H,115 - Part Type: Diode - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Nexperia USA Inc. - Role: Clamping - Role Details: Schottky over-voltage clamp: anode to I_SENSE, cathode to +3V3 - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/BAT54H.pdf **Pins:** - A [pin 2] - K [pin 1] ### D_CLAMP_V — [BAT54H,115](https://www.flux.ai/jecstronic/bat54hc115~nbk.md) - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/BAT54H.pdf - Role Details: Schottky over-voltage clamp: anode to V_SENSE, cathode to +3V3 - Manufacturer Name: Nexperia USA Inc. - Manufacturer Part Number: BAT54H,115 - Part Type: Diode - License: https://creativecommons.org/licenses/by/4.0/ - Role: Clamping **Pins:** - A [pin 2] - K [pin 1] ### D_STATUS — [KT-0603R](https://www.flux.ai/adrian95/kt-0603r~7c.md) - Manufacturer Name: Hubei KENTO Elec - Part Type: LED - Role: Signal Generation - Role Details: Red status LED driven from PC13 through R_STATUS - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_1810231112_Hubei-KENTO-Elec-KT-0603R_C2286.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: KT-0603R **Pins:** - A [pin 2] - K [pin 1] ### D_TVS — [P6SMB33CA](https://www.flux.ai/lcsc/p6smb33ca~2evp.md) - Manufacturer Part Number: P6SMB33CA - Role: Protection - Part Type: TVS - Role Details: P6SMB33CA bidirectional TVS from +12V to GND - Product Info Url: https://lcsc.com/product-detail/TVS_P6SMB33CA_C188304.html - LCSC Part Number: C188304 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2409280130_FMS-Formosa-Microsemi-P6SMB33CA_C188304.pdf - JLCPCB Part Class: Extended Part - Package or Case Code: SMB_L4.6-W3.6-LS5.3-BI - Manufacturer Name: FMS(美丽微) **Pins:** - A [pin 2] - K [pin 1] ### D1 — [1N4007RLG](https://www.flux.ai/jecstronic/1n4007rlg~07j.md) - Manufacturer Part Number: 1N4007RLG - Role: Flyback / Freewheeling - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: K1 coil flyback diode: cathode +12V, anode coil low side - Manufacturer Name: onsemi - Datasheet URL: https://www.onsemi.com/pdf/datasheet/1n4001-d.pdf - Part Type: Diode **Pins:** - anode [pin 2] - cathode [pin 1] ### D2 — [1N4007RLG](https://www.flux.ai/jecstronic/1n4007rlg~07j.md) - Manufacturer Name: onsemi - Datasheet URL: https://www.onsemi.com/pdf/datasheet/1n4001-d.pdf - Role: Flyback / Freewheeling - Part Type: Diode - Role Details: K2 coil flyback diode: cathode +12V, anode coil low side - Manufacturer Part Number: 1N4007RLG - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - anode [pin 2] - cathode [pin 1] ### D3 — [1N4007RLG](https://www.flux.ai/jecstronic/1n4007rlg~07j.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: 1N4007RLG - Role Details: K3 coil flyback diode: cathode +12V, anode coil low side - Datasheet URL: https://www.onsemi.com/pdf/datasheet/1n4001-d.pdf - Part Type: Diode - Role: Flyback / Freewheeling - Manufacturer Name: onsemi **Pins:** - anode [pin 2] - cathode [pin 1] ### FB_VDDA — [GZ1608D601TF](https://www.flux.ai/adrian95/gz1608d601tf~3gg.md) - Part Type: Ferrite Bead - License: https://creativecommons.org/licenses/by/4.0/ - Role: Choke (EMI Filter) - Role Details: Ferrite bead feeding STM32 VDDA from +3V3 - Manufacturer Part Number: GZ1608D601TF - Datasheet URL: https://www.sunlordinc.com//uploads/files/20230829/GZ%20series%20of%20Multilayer%20Chip%20Ferrite%20Bead.pdf - Manufacturer Name: Shenzhen Sunlord Electronics Co., Ltd. **Pins:** - 1 [pin 1] - 2 [pin 2] ### J_ANT — [U.FL-R-SMT(01)](https://www.flux.ai/lcsc/upfl-r-smt01~zsby.md) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_HRS-Hirose-U-FL-R-SMT-01_C434812.pdf - JLCPCB Part Class: Extended Part - Role Details: U.FL coax connector for LTE main antenna - Part Type: RF Connectors / Coaxial Connectors - LCSC Part Number: C434812 - Product Info Url: https://lcsc.com/product-detail/RF-Connectors-Coaxial-Connectors_Hirose-HRS-U-FL-R-SMT-01_C434812.html - Manufacturer Name: HRS(广濑) - Manufacturer Part Number: U.FL-R-SMT(01) - Role: RF Connector - Package or Case Code: ANT-SMD_UFL-R-SMT01 **Pins:** - CONT [pin 2] - GND [pin 1] - GND [pin 3] ### J_CS_IN — [0395443004](https://www.flux.ai/jecstronic/0395443004~3h5.md) - Datasheet URL: https://www.molex.com/pdm_docs/sd/395443002_sd.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Current sense terminal: pins 1-2 to ACS712 IP+, pins 3-4 to ACS712 IP- - Manufacturer Name: Molex - Manufacturer Part Number: 0395443004 - Part Type: Connector - Role: Connector **Pins:** - PIN_1 [pin 1] - PIN_2 [pin 2] - PIN_3 [pin 3] - PIN_4 [pin 4] ### J_DELTA — [DB127V-5.08-2P-GN-S](https://www.flux.ai/cherepanyadima/db127v-5p08-2p-gn-s~ic.md) - Part Type: Connector - Manufacturer Name: DORABO - Manufacturer Part Number: DB127V-5.08-2P-GN-S - Role Details: Delta contactor coil terminals switched by K3 contacts - Datasheet URL: https://www.lcsc.com/datasheet/C3018698.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=ElhbUlFSRlUNBF0CQlQIBQBUFFILBFEAQVVWUgZWE1gxVlNRQVVdVFRSQ1daVDsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Role: Relay Output Terminal **Pins:** - 1 [pin 1] - 2 [pin 2] ### J_LINK — [B12B-XH-A(LF)(SN)](https://www.flux.ai/lcsc/b12b-xh-alfsn~jih5.md) - Connector Rows: 1 - Manufacturer Part Number: B12B-XH-A(LF)(SN) - Product Info Url: https://lcsc.com/product-detail/XH-Connectors_JST_B12B-XH-A-LF-SN_XHsocket-1-12P-pitch2-5mm_C158027.html - Part Type: Wire To Board / Wire To Wire Connector - Manufacturer Name: JST - Role Details: Carries power, relay controls, and sensor outputs between HV board and logic board - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_JST-B12B-XH-A-LF-SN_C158027.pdf - LCSC Part Number: C158027 - Role: Board-to-board connector - Package or Case Code: CONN-TH_B12B-XH-A-LF-SN - Connector Positions: 12 - JLCPCB Part Class: Extended Part - Connector Pitch: 2.5mm - Connector Type: JST-XH **Pins:** - 1 [pin 1] - 10 [pin 10] - 11 [pin 11] - 12 [pin 12] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - 8 [pin 8] - 9 [pin 9] ### J_MAIN — [DB127V-5.08-2P-GN-S](https://www.flux.ai/cherepanyadima/db127v-5p08-2p-gn-s~ic.md) - Manufacturer Part Number: DB127V-5.08-2P-GN-S - Manufacturer Name: DORABO - Role: Relay Output Terminal - Part Type: Connector - Datasheet URL: https://www.lcsc.com/datasheet/C3018698.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=ElhbUlFSRlUNBF0CQlQIBQBUFFILBFEAQVVWUgZWE1gxVlNRQVVdVFRSQ1daVDsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Role Details: Main contactor coil terminals switched by K1 contacts **Pins:** - 1 [pin 1] - 2 [pin 2] ### J_NEUTRAL — [DB127V-5.08-2P-GN-S](https://www.flux.ai/cherepanyadima/db127v-5p08-2p-gn-s~ic.md) - Manufacturer Part Number: DB127V-5.08-2P-GN-S - Manufacturer Name: DORABO - Role: Neutral Terminal - Part Type: Connector - Role Details: Common neutral return for 230VAC contactor coils - Datasheet URL: https://www.lcsc.com/datasheet/C3018698.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=ElhbUlFSRlUNBF0CQlQIBQBUFFILBFEAQVVWUgZWE1gxVlNRQVVdVFRSQ1daVDsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D **Pins:** - 1 [pin 1] - 2 [pin 2] ### J_PWR — [DB127V-5.08-2P-GN-S](https://www.flux.ai/cherepanyadima/db127v-5p08-2p-gn-s~ic.md) - Part Type: Connector - Role: Power Input Connector - Manufacturer Name: DORABO - Manufacturer Part Number: DB127V-5.08-2P-GN-S - Role Details: External 12V DC input screw terminal; pin 1 +12V, pin 2 GND - Datasheet URL: https://www.lcsc.com/datasheet/C3018698.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=ElhbUlFSRlUNBF0CQlQIBQBUFFILBFEAQVVWUgZWE1gxVlNRQVVdVFRSQ1daVDsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D **Pins:** - 1 [pin 1] - 2 [pin 2] ### J_S1 — [DB127V-5.08-2P-GN-S](https://www.flux.ai/cherepanyadima/db127v-5p08-2p-gn-s~ic.md) - Role Details: Field float switch contact input feeding U_OPTO1 LED through R_OPTO1 - Datasheet URL: https://www.lcsc.com/datasheet/C3018698.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=ElhbUlFSRlUNBF0CQlQIBQBUFFILBFEAQVVWUgZWE1gxVlNRQVVdVFRSQ1daVDsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Manufacturer Name: DORABO - Manufacturer Part Number: DB127V-5.08-2P-GN-S - Role: Connector - Part Type: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] ### J_S2 — [DB127V-5.08-2P-GN-S](https://www.flux.ai/cherepanyadima/db127v-5p08-2p-gn-s~ic.md) - Manufacturer Part Number: DB127V-5.08-2P-GN-S - Role: Connector - Manufacturer Name: DORABO - Part Type: Connector - Role Details: Field overload relay contact input feeding U_OPTO2 LED through R_OPTO2 - Datasheet URL: https://www.lcsc.com/datasheet/C3018698.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=ElhbUlFSRlUNBF0CQlQIBQBUFFILBFEAQVVWUgZWE1gxVlNRQVVdVFRSQ1daVDsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D **Pins:** - 1 [pin 1] - 2 [pin 2] ### J_SIM — [78646-3001](https://www.flux.ai/adrian95/78646-3001~u5c.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Role Details: Micro SIM holder; C1 VCC, C2 RST, C3 CLK, C5 GND, C7 I/O; no card-detect switch - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Molex%20PDFs/micro-SIM_CardSockets(Hinged,PushPull).pdf - Manufacturer Part Number: 78646-3001 - Manufacturer Name: Molex - Role: SIM Connector **Pins:** - CLK [pin C3] - GND [pin G2] - GND [pin G6] - GND [pin C5] - GND [pin G4] - GND [pin G1] - GND [pin G3] - GND [pin G5] - I/O [pin C7] - RST [pin C2] - VCC [pin C1] - VPP [pin C6] ### J_STAR — [DB127V-5.08-2P-GN-S](https://www.flux.ai/cherepanyadima/db127v-5p08-2p-gn-s~ic.md) - Role: Relay Output Terminal - Role Details: Star contactor coil terminals switched by K2 contacts - Part Type: Connector - Manufacturer Part Number: DB127V-5.08-2P-GN-S - Manufacturer Name: DORABO - Datasheet URL: https://www.lcsc.com/datasheet/C3018698.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=ElhbUlFSRlUNBF0CQlQIBQBUFFILBFEAQVVWUgZWE1gxVlNRQVVdVFRSQ1daVDsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D **Pins:** - 1 [pin 1] - 2 [pin 2] ### J_SWD — [Pin Header 01x05 2.54mm Vertical](https://www.flux.ai/adrian95/pin-header-01x05-254mm-vertical~cas.md) - Role Details: SWD debug/programming header - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Role: Logic-level Shifting **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] ### J_UART — [Pin Header 01x03 2.54mm Vertical](https://www.flux.ai/adrian95/pin-header-01x03-254mm-vertical~cp4.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: USART2 debug UART header - Part Type: Connector - Role: Logic-level Shifting **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] ### J_VS_IN — [DB127V-5.08-2P-GN-S](https://www.flux.ai/cherepanyadima/db127v-5p08-2p-gn-s~ic.md) - Role: Connector - Datasheet URL: https://www.lcsc.com/datasheet/C3018698.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=ElhbUlFSRlUNBF0CQlQIBQBUFFILBFEAQVVWUgZWE1gxVlNRQVVdVFRSQ1daVDsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Role Details: 230VAC voltage sense input to ZMPT101B primary through R_BURDEN - Part Type: Connector - Manufacturer Part Number: DB127V-5.08-2P-GN-S - Manufacturer Name: DORABO **Pins:** - 1 [pin 1] - 2 [pin 2] ### K1 — [G2RL-1A-E DC12](https://www.flux.ai/lcsc/g2rl-1a-e-dc12~9l7d.md) - LCSC Part Number: C1564126 - Manufacturer Name: OMRON(欧姆龙) - Package or Case Code: RELAY-TH_OMRON_G2RL-1A-E-HA-DCXX - Manufacturer Part Number: G2RL-1A-E DC12 - JLCPCB Part Class: Extended Part - Role Details: Main contactor relay; Omron G2RL-1A-E DC12 SPST-NO, 440VAC-rated family - Role: Switching - Part Type: Power Relays **Pins:** - 1 [pin 1] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 8 [pin 8] ### K2 — [G2RL-1A-E DC12](https://www.flux.ai/lcsc/g2rl-1a-e-dc12~9l7d.md) - Package or Case Code: RELAY-TH_OMRON_G2RL-1A-E-HA-DCXX - Manufacturer Name: OMRON(欧姆龙) - Role Details: Star contactor relay; Omron G2RL-1A-E DC12 SPST-NO, 440VAC-rated family - LCSC Part Number: C1564126 - JLCPCB Part Class: Extended Part - Manufacturer Part Number: G2RL-1A-E DC12 - Part Type: Power Relays - Role: Switching **Pins:** - 1 [pin 1] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 8 [pin 8] ### K3 — [G2RL-1A-E DC12](https://www.flux.ai/lcsc/g2rl-1a-e-dc12~9l7d.md) - Part Type: Power Relays - JLCPCB Part Class: Extended Part - Manufacturer Part Number: G2RL-1A-E DC12 - Package or Case Code: RELAY-TH_OMRON_G2RL-1A-E-HA-DCXX - Manufacturer Name: OMRON(欧姆龙) - Role Details: Delta contactor relay; Omron G2RL-1A-E DC12 SPST-NO, 440VAC-rated family - LCSC Part Number: C1564126 - Role: Switching **Pins:** - 1 [pin 1] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 8 [pin 8] ### MOV1 — [B72210S0271K101](https://www.flux.ai/cherepanyadima/b72210s0271k101~3w.md) - Role: Protection - Manufacturer Name: Littelfuse - Part Type: Varistor - Package or Case Code: MOV radial 10mm - Manufacturer Part Number: V275LA10P - Datasheet URL: https://www.tdk-electronics.tdk.com/inf/70/db/var/SIOV_Leaded_StandarD.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Voltage Rating: 275VAC - Role Details: 275VAC radial MOV across relay contactor-coil switching contacts. **Pins:** - 1 [pin 1] - 2 [pin 2] ### MOV2 — [B72210S0271K101](https://www.flux.ai/cherepanyadima/b72210s0271k101~3w.md) - Manufacturer Part Number: V275LA10P - Datasheet URL: https://www.tdk-electronics.tdk.com/inf/70/db/var/SIOV_Leaded_StandarD.pdf - Role: Protection - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Littelfuse - Role Details: 275VAC radial MOV across relay contactor-coil switching contacts. - Voltage Rating: 275VAC - Package or Case Code: MOV radial 10mm - Part Type: Varistor **Pins:** - 1 [pin 1] - 2 [pin 2] ### MOV3 — [B72210S0271K101](https://www.flux.ai/cherepanyadima/b72210s0271k101~3w.md) - Part Type: Varistor - Role: Protection - Manufacturer Name: Littelfuse - License: https://creativecommons.org/licenses/by/4.0/ - Voltage Rating: 275VAC - Role Details: 275VAC radial MOV across relay contactor-coil switching contacts. - Package or Case Code: MOV radial 10mm - Manufacturer Part Number: V275LA10P - Datasheet URL: https://www.tdk-electronics.tdk.com/inf/70/db/var/SIOV_Leaded_StandarD.pdf **Pins:** - 1 [pin 1] - 2 [pin 2] ### Q_PWR — [BC547BTA](https://www.flux.ai/lcsc/bc547bta~cvr.md) - JLCPCB Part Class: Extended Part - Role Details: STM32 PB0 drives base through R_PWRKEY; collector pulls U_LTE ~PWRKEY low for boot pulse - Manufacturer Name: onsemi(安森美) - Product Info Url: https://lcsc.com/product-detail/Transistors-NPN-PNP_ON-Semicon_BC547BTA_ON-Semicon-ON-BC547BTA_C258144.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010400_onsemi-BC547BTA_C258144.pdf - LCSC Part Number: C258144 - Manufacturer Part Number: BC547BTA - Role: Switching - Part Type: Bipolar Transistors - BJT - Package or Case Code: TO-92-3_L4.8-W3.7-P2.54-L **Pins:** - B [pin 2] - C [pin 1] - E [pin 3] ### Q1 — [BC547BTA](https://www.flux.ai/lcsc/bc547bta~cvr.md) - LCSC Part Number: C258144 - Role Details: Low-side NPN driver for K1 coil from RELAY_MAIN - Product Info Url: https://lcsc.com/product-detail/Transistors-NPN-PNP_ON-Semicon_BC547BTA_ON-Semicon-ON-BC547BTA_C258144.html - Manufacturer Name: onsemi(安森美) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010400_onsemi-BC547BTA_C258144.pdf - JLCPCB Part Class: Extended Part - Role: Switching - Package or Case Code: TO-92-3_L4.8-W3.7-P2.54-L - Part Type: Bipolar Transistors - BJT - Manufacturer Part Number: BC547BTA **Pins:** - B [pin 2] - C [pin 1] - E [pin 3] ### Q2 — [BC547BTA](https://www.flux.ai/lcsc/bc547bta~cvr.md) - Role Details: Low-side NPN driver for K2 coil from RELAY_STAR - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010400_onsemi-BC547BTA_C258144.pdf - Product Info Url: https://lcsc.com/product-detail/Transistors-NPN-PNP_ON-Semicon_BC547BTA_ON-Semicon-ON-BC547BTA_C258144.html - Manufacturer Name: onsemi(安森美) - LCSC Part Number: C258144 - JLCPCB Part Class: Extended Part - Role: Switching - Package or Case Code: TO-92-3_L4.8-W3.7-P2.54-L - Manufacturer Part Number: BC547BTA - Part Type: Bipolar Transistors - BJT **Pins:** - B [pin 2] - C [pin 1] - E [pin 3] ### Q3 — [BC547BTA](https://www.flux.ai/lcsc/bc547bta~cvr.md) - LCSC Part Number: C258144 - Product Info Url: https://lcsc.com/product-detail/Transistors-NPN-PNP_ON-Semicon_BC547BTA_ON-Semicon-ON-BC547BTA_C258144.html - Manufacturer Name: onsemi(安森美) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010400_onsemi-BC547BTA_C258144.pdf - JLCPCB Part Class: Extended Part - Package or Case Code: TO-92-3_L4.8-W3.7-P2.54-L - Part Type: Bipolar Transistors - BJT - Role Details: Low-side NPN driver for K3 coil from RELAY_DELTA - Role: Switching - Manufacturer Part Number: BC547BTA **Pins:** - B [pin 2] - C [pin 1] - E [pin 3] ### T1 — [ZMPT101B](https://www.flux.ai/lcsc/zmpt101b~65gv.md) - Role: Voltage Sensor - LCSC Part Number: C111858 - Manufacturer Part Number: ZMPT101B - Package or Case Code: XFMR-TH_ZMPT101B - JLCPCB Part Class: Extended Part - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Current Transformers - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/6e11ac51dd4c224b010e68e859db5deabf5b321a76ab26c439e0872369a57706.pdf - Manufacturer Name: 择明朗熙 - Role Details: ZMPT101B transformer-isolated 230VAC voltage sensing input **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### U_3V3 — [AMS1117-3.3](https://www.flux.ai/vasy_skral/ams1117-33~34.md) - Symbol Style: Parametric - Datasheet URL: http://www.advanced-monolithic.com/pdf/ds1117.pdf - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: AMS - Manufacturer Part Number: AMS1117-3.3 - Role Details: +5V to +3V3 AMS1117; layout requires 10x10mm copper heatsink pad plus 4 thermal vias to GND; thermals not validated without load current - Role: Power Conversion **Pins:** - GND [pin 1] - TAB(VOUT) [pin 4] - VIN [pin 3] - VOUT [pin 2] ### U_4V — [LMR33630ADDAR](https://www.flux.ai/lcsc/lmr33630addar~jgsz.md) - Role: Power Conversion - JLCPCB Part Class: Extended Part - Datasheet URL: ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Flmr33630 - Manufacturer Name: TI(德州仪器) - LCSC Part Number: C841384 - Package or Case Code: ESOP-8_L4.9-W3.9-P1.27-LS6.0-TL-EP - Part Type: DC-DC Converters - Manufacturer Part Number: LMR33630ADDAR - Role Details: 12V to +4V, feedback set for 4.0V; EN tied to VIN; PG left open if unused **Pins:** - BOOT [pin 7] - EN [pin 3] - EP [pin 9] - FB [pin 5] - PG [pin 4] - PGND [pin 1] - SW [pin 8] - VCC [pin 6] - VIN [pin 2] ### U_5V — [AMS1117-5.0](https://www.flux.ai/vasy_skral/ams1117-50~zsf.md) - Role: Power Conversion - Manufacturer Name: AMS - Part Type: Integrated Circuit - Manufacturer Part Number: AMS1117-5.0 - Role Details: 12V to +5V AMS1117; layout requires 10x10mm copper heatsink pad plus 4 thermal vias to GND; thermals not validated without load current - Datasheet URL: https://datasheet.lcsc.com/lcsc/1810231832_Advanced-Monolithic-Systems-AMS1117-5-0_C6187.pdf - Symbol Style: parametric-v1 **Pins:** - GND [pin 1] - TAB(VOUT) [pin 4] - VIN [pin 3] - VOUT [pin 2] ### U_COND — [LM258DR](https://www.flux.ai/lcsc/lm258dr~t3wc.md) - Product Info Url: https://lcsc.com/product-detail/General-Purpose-Amplifiers_UMW-Youtai-Semiconductor-Co-Ltd-LM258DR_C668209.html - Manufacturer Name: UMW(友台半导体) - Role Details: Channel 1 buffers scaled ACS712 VIOUT to I_SENSE; Channel 2 conditions biased ZMPT101B voltage signal to V_SENSE - LCSC Part Number: C668209 - Operating Temperature: -25 ~ +85℃ - Output Current: 40mA - Voltage Supply: 32V - JLCPCB Part Class: Extended Part - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2409280231_UMW-Youtai-Semiconductor-Co---Ltd--LM258DR_C668209.pdf - Role: Signal Conditioning - Quiescent Current: 1mA - Part Type: Operational Amplifier - Package or Case Code: SOIC-8_L5.0-W4.0-P1.27-LS6.0-BL - Manufacturer Part Number: LM258DR **Pins:** - INA- [pin 2] - INA+ [pin 3] - INB- [pin 6] - INB+ [pin 5] - OUTA [pin 1] - OUTB [pin 7] - V- [pin 4] - V+ [pin 8] ### U_CS — [SOIC-8 3.9x4.9mm_P1.27mm](https://www.flux.ai/jharwinbarrozo/soic-8-39x49mmp127mm~dur.md) - LCSC Part Number: C10681 - Part Type: Integrated Circuit - Manufacturer Name: Allegro - Role Details: Generic SOIC-8 placeholder for ACS712ELCTR-30A-T; pin map: 1 IP+, 2 IP+, 3 IP-, 4 IP-, 5 GND, 6 FILTER, 7 VIOUT, 8 VCC. PCB Power confirmed availability/pricing per user. - Role: Current Sensor - Manufacturer Part Number: ACS712ELCTR-30A-T - Package: SOIC-8 1.27mm pitch **Pins:** - 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 ### U_LTE — [A7672SA LASE_](https://www.flux.ai/cherepanyadima/a7672sa-lase~7n.md) - Manufacturer Name: SIMCom Wireless Solutions Limited - Manufacturer Part Number: A7672SA-LASE - Role Details: 4G LTE module; must be powered only from +4V rail; UART crosses to STM32 PA9/PA10 - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/7559/A7672SA.pdf - Symbol Style: Parametric - Role: Cellular Modem - Part Type: RF Transceiver **Pins:** - ~PWRKEY [pin 1] - ~RESET [pin 16] - 1PPS [pin 100] - 1V8_GNSS [pin 97] - ADC [pin 25] - BT_ANT [pin 93] - CAM_I2C_SCL [pin 118] - CAM_I2C_SDA [pin 117] - CAM_MCLK [pin 121] - CAM_PWDN [pin 119] - CAM_RST [pin 120] - CAM_SPI_CLK [pin 124] - CAM_SPI_D0 [pin 122] - CAM_SPI_D1 [pin 123] - CTS [pin 7] - DCD [pin 5] - DTR [pin 3] - EAR_N [pin 41] - EAR_P [pin 40] - GND_1 [pin 2] - GND_1__1 [pin 17] - GND_1__10 [pin 61] - GND_1__11 [pin 62] - GND_1__12 [pin 63] - GND_1__13 [pin 64] - GND_1__14 [pin 65] - GND_1__2 [pin 18] - GND_1__3 [pin 29] - GND_1__4 [pin 39] - GND_1__5 [pin 45] - GND_1__6 [pin 46] - GND_1__7 [pin 54] - GND_1__8 [pin 58] - GND_1__9 [pin 59] - GND_2 [pin 69] - GND_2__1 [pin 70] - GND_2__10 [pin 79] - GND_2__11 [pin 80] - GND_2__12 [pin 81] - GND_2__13 [pin 82] - GND_2__14 [pin 83] - GND_2__2 [pin 71] - GND_2__3 [pin 72] - GND_2__4 [pin 73] - GND_2__5 [pin 74] - GND_2__6 [pin 75] - GND_2__7 [pin 76] - GND_2__8 [pin 77] - GND_2__9 [pin 78] - GND_3 [pin 84] - GND_3__1 [pin 85] - GND_3__2 [pin 86] - GND_3__3 [pin 87] - GND_3__4 [pin 88] - GND_3__5 [pin 89] - GND_3__6 [pin 91] - GND_3__7 [pin 92] - GND_3__8 [pin 94] - GNSS_ANT [pin 90] - GNSS_PWRCTL [pin 98] - GNSS_RXD [pin 96] - GNSS_TXD [pin 95] - GNSS_VBKP [pin 116] - GPIO1 [pin 19] - GPIO2 [pin 26] - GPIO3 [pin 48] - GPIO4 [pin 53] - I2C_SCL [pin 38] - I2C_SDA [pin 37] - LCD_BL_PWM [pin 101] - LCD_DCX [pin 107] - LCD_RST [pin 106] - LCD_SPI_CLK [pin 102] - LCD_SPI_CS [pin 105] - LCD_SPI_RXD [pin 104] - LCD_SPI_TXD [pin 103] - MIC_N [pin 43] - MIC_P [pin 42] - MK_IN_2 [pin 47] - MK_IN_3 [pin 20] - MK_IN_5 [pin 68] - MK_IN_6/I2C3_SCL [pin 36] - MK_OUT_2 [pin 44] - MK_OUT_3 [pin 21] - MK_OUT_5 [pin 67] - MK_OUT_6/I2C3_SDA [pin 35] - NC [pin 113] - NC__1 [pin 114] - NC__2 [pin 115] - NETLIGHT [pin 52] - RF_ANT [pin 60] - RI [pin 4] - RTS [pin 8] - RXD [pin 10] - SPI_CLK [pin 11] - SPI_CS [pin 12] - SPI_MISO [pin 14] - SPI_MOSI [pin 13] - STATUS [pin 66] - TXD [pin 9] - UART_LOG_RX [pin 22] - UART_LOG_TX [pin 23] - UART3_RXD [pin 49] - UART3_TXD [pin 50] - USB_BOOT [pin 6] - USB_DM [pin 28] - USB_DP [pin 27] - USIM1_CLK [pin 32] - USIM1_DATA [pin 31] - USIM1_DET [pin 34] - USIM1_RST [pin 33] - USIM1_VDD [pin 30] - USIM2_CLK [pin 109] - USIM2_DATA [pin 108] - USIM2_DET [pin 112] - USIM2_RST [pin 111] - USIM2_VDD [pin 110] - VBAT [pin 55] - VBAT__1 [pin 56] - VBAT__2 [pin 57] - VBAT_ADC [pin 51] - VBUS [pin 24] - VDD_1V8 [pin 15] - VDD_2V8 [pin 99] ### U_MCU — [STM32F103C8T6](https://www.flux.ai/jharwinbarrozo/stm32f103c8t6~qe2.md) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811151642_STMicroelectronics-STM32F103C8T6_C8734.pdf - Part Type: Microcontroller - Role: Logic-level Shifting - Manufacturer Part Number: STM32F103C8T6 - Manufacturer Name: STMicroelectronics - Role Details: STM32F103C8T6 LQFP-48 main microcontroller **Pins:** - BOOT0 [pin 44] - NRST [pin 7] - PA0_WKUP [pin 10] - PA1 [pin 11] - PA10 [pin 31] - PA11 [pin 32] - PA12 [pin 33] - PA13 [pin 34] - PA14 [pin 37] - PA15 [pin 38] - PA2 [pin 12] - PA3 [pin 13] - PA4 [pin 14] - PA5 [pin 15] - PA6 [pin 16] - PA7 [pin 17] - PA8 [pin 29] - PA9 [pin 30] - PB0 [pin 18] - PB1 [pin 19] - PB10 [pin 21] - PB11 [pin 22] - PB12 [pin 25] - PB13 [pin 26] - PB14 [pin 27] - PB15 [pin 28] - PB2 [pin 20] - PB3 [pin 39] - PB4 [pin 40] - PB5 [pin 41] - PB6 [pin 42] - PB7 [pin 43] - PB8 [pin 45] - PB9 [pin 46] - PC13_TAMPER_RTC [pin 2] - PC14_OSC32_IN [pin 3] - PC15_OSC32_OUT [pin 4] - PD0_OSC_IN [pin 5] - PD1_OSC_OUT [pin 6] - VBAT [pin 1] - VDD [pin 24] - VDD [pin 48] - VDD [pin 36] - VDDA [pin 9] - VSS [pin 23] - VSS [pin 47] - VSS [pin 35] - VSSA [pin 8] ### U_OPTO1 — [PC817C](https://www.flux.ai/lcsc/pc817c~nbmh.md) - Role Details: PC817C optocoupler for isolated FLOAT_IN input - Manufacturer Part Number: PC817C - Role: Isolation - Manufacturer Name: 华润华晶 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1809251512_Wuxi-China-Resources-Huajing-Microelectronics-PC817C_C115500.pdf - LCSC Part Number: C115500 - Product Info Url: https://lcsc.com/product-detail/DIP-Optocouplers_PC817C_C115500.html - JLCPCB Part Class: Extended Part - Package or Case Code: DIP-4_L4.6-W6.5-P2.54-LS7.6-BL - Part Type: Optocouplers - Phototransistor Output **Pins:** - AN [pin 1] - CAT [pin 2] - COL [pin 4] - EM [pin 3] ### U_OPTO2 — [PC817C](https://www.flux.ai/lcsc/pc817c~nbmh.md) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1809251512_Wuxi-China-Resources-Huajing-Microelectronics-PC817C_C115500.pdf - Manufacturer Name: 华润华晶 - Manufacturer Part Number: PC817C - Role Details: PC817C optocoupler for isolated OVERLOAD_IN input - Role: Isolation - Package or Case Code: DIP-4_L4.6-W6.5-P2.54-LS7.6-BL - Part Type: Optocouplers - Phototransistor Output - JLCPCB Part Class: Extended Part - Product Info Url: https://lcsc.com/product-detail/DIP-Optocouplers_PC817C_C115500.html - LCSC Part Number: C115500 **Pins:** - AN [pin 1] - CAT [pin 2] - COL [pin 4] - EM [pin 3] ### Y1 — [FOXSDLF/080-20](https://www.flux.ai/adrian95/foxsdlf080-20~obe.md) - Part Type: Oscillator - Manufacturer Part Number: Fox Electronics - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: FOXSDLF/080-20 - Datasheet URL: https://abracon.com/datasheets/Fox/FC4SD.pdf?utm_source=foxonline.com&utm_medium=301 - Role: Signal Generation - Role Details: 8MHz HSE crystal between OSC_IN and OSC_OUT **Pins:** - P1 [pin 1] - P2 [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/akpatelak/12v-multi-rail-power-section~mt](https://www.flux.ai/akpatelak/12v-multi-rail-power-section~mt).* --- *Generated from [https://www.flux.ai/akpatelak/12v-multi-rail-power-section~mt](https://www.flux.ai/akpatelak/12v-multi-rail-power-section~mt)*