# Board A LV Controller ## Description Per-channel low-voltage controller PCB for RIL TC/HF/LeTID and PID test benches. STM32H7, 16-bit DAC setpoints, 24-bit ADC sense (4-wire), isolated digital interface to gate driver, PT100/RH conditioning, Ethernet, interlocks. Safety-critical brain board. ## Project Details - **Owner:** anahatasri - **Created:** 5/7/2026 - **Last Updated:** 5/7/2026 - **Visibility:** Public - **Copies:** 1 ## Key Components ### D1 — [SMBJ30A-13-F](https://www.flux.ai/lcsc/smbj30a-13-f~6day.md) - LCSC Part Number: C135065 - JLCPCB Part Class: Extended Part - Role: Input TVS - Manufacturer Name: DIODES(美台) - Product Info Url: https://lcsc.com/product-detail/TVS_DIODES_SMBJ30A-13-F_SMBJ30A-13-F_C135065.html - Part Type: TVS - Role Details: SMBJ30A TVS across protected 24V rail to ground - Manufacturer Part Number: SMBJ30A-13-F - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Diodes-Incorporated-SMBJ30A-13-F_C135065.pdf - Package or Case Code: SMB_L4.6-W3.6-LS5.3-RD **Pins:** - A [pin 2] - K [pin 1] ### D2 — [Generic LED SMD](https://www.flux.ai/jharwinbarrozo/generic-led-smd~ku.md) - Part Type: LED - Package: LED_0603_1608Metric - Role Details: 3V3 power-good/status indicator - Package or Case Code: 0603 - Role: Status LED **Pins:** - A [pin 2] - K [pin 1] ### D3 — [Generic LED SMD](https://www.flux.ai/jharwinbarrozo/generic-led-smd~ku.md) - Role Details: MCU-controlled firmware/user LED - Part Type: LED - Role: Status LED - Package or Case Code: 0603 - Package: LED_0603_1608Metric **Pins:** - A [pin 2] - K [pin 1] ### F1 — [BLACKSWIFT_GENERIC_PTC1812](https://www.flux.ai/swiftpilot/blackswiftgenericptc1812~65.md) - Current Rating: 3A - Package or Case Code: BLACKSWIFT_GENERIC_PTC1812 - Role: Input Fuse - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: 3A input current limit; production MPN to be finalized during physical-constraints sourcing pass - Part Type: Fuse **Pins:** - P1 [pin P$1] - P2 [pin P$2] ### J1 — [Phoenix Contact 1757242](https://www.flux.ai/adrian95/phoenix-contact-1757242~wl2.md) - Datasheet URL: https://www.phoenixcontact.com/product/pdf/api/v1/MTc1NzI0Mg?_realm=us&_locale=en-US&blocks=commercial-data%2Ctechnical-data%2Cdrawings%2Capprovals%2Cclassifications%2Cenvironmental-compliance-data%2Call-accessories - Role: Power Input Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Phoenix Contact - Manufacturer Part Number: 1757242 - Part Type: Connector - Role Details: 2-pin Phoenix MSTB-style 5.08mm terminal block for 24VDC input; Digi-Key/Mouser availability indicated by library search **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] ### J2 — [USB4105-GF-A](https://www.flux.ai/adrian95/usb4105-gf-a~im9.md) - Datasheet URL: https://gct.co/files/specs/usb4105-spec.pdf - Symbol Style: parametric-v1 - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: USB 2.0 Type-C receptacle for STM32 firmware update; Digi-Key/Mouser availability indicated by library metadata - Manufacturer Name: GCT - Manufacturer Part Number: USB4105-GF-A - Manufacturer Name: GCT - Part Type: USB C - Role: USB-C Device Port **Pins:** - CC1 [pin A5] - CC2 [pin B5] - DN1 [pin A7] - DN2 [pin B7] - DP1 [pin A6] - DP2 [pin B6] - GND [pin A1_B12] - GND__1 [pin B1_A12] - SBU1 [pin A8] - SBU2 [pin B8] - SHELL_GND [pin SH1] - SHELL_GND__1 [pin SH2] - SHELL_GND__2 [pin SH3] - SHELL_GND__3 [pin SH4] - VBUS [pin A4_B9] - VBUS__1 [pin B4_A9] ### Q1 — [DMG2305UX-7](https://www.flux.ai/jwace81/dmg2305ux-7~06.md) - Datasheet URL: https://www.diodes.com/assets/Datasheets/DMG2305UX.pdf - Manufacturer Part Number: DMG2305UX-7 - Manufacturer Name: Diodes Incorporated - Role: Reverse Polarity Protection - Role Details: P-channel MOSFET for 24V input reverse polarity protection; Digi-Key/Mouser availability indicated by library metadata **Pins:** - ~ [pin 3] - ~ [pin 1] - ~ [pin 2] ### SW1 — [PTS645SM43SMTR92 LFS](https://www.flux.ai/jecstronic/pts645sm43smtr92-lfs~854.md) - Role: Reset Button - Manufacturer Part Number: PTS645SM43SMTR92 LFS - Manufacturer Name: C&K - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Switch - Datasheet URL: https://www.ckswitches.com/media/1471/pts645.pdf **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### SW2 — [PTS645SM43SMTR92 LFS](https://www.flux.ai/jecstronic/pts645sm43smtr92-lfs~854.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Switch - Datasheet URL: https://www.ckswitches.com/media/1471/pts645.pdf - Role: BOOT0 Button - Manufacturer Part Number: PTS645SM43SMTR92 LFS - Manufacturer Name: C&K **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### U1 — [STM32H743VIT6](https://www.flux.ai/vasy_skral/stm32h743vit6~qg.md) - Part Type: Microcontroller - Manufacturer Part Number: STM32H743VIT6 - Datasheet URL: https://www.st.com/resource/en/datasheet/stm32h743bi.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: STM32H743VIT6 LQFP100, 480MHz Cortex-M7; Digi-Key/Mouser availability indicated by library metadata - Role: Main MCU - Manufacturer Name: STMicroelectronics **Pins:** - BOOT0 [pin 94] - NRST [pin 14] - PA0 [pin 22] - PA1 [pin 23] - PA10 [pin 69] - PA11 [pin 70] - PA12 [pin 71] - PA13 [pin 72] - PA14 [pin 76] - PA15 [pin 77] - PA2 [pin 24] - PA3 [pin 25] - PA4 [pin 28] - PA5 [pin 29] - PA6 [pin 30] - PA7 [pin 31] - PA8 [pin 67] - PA9 [pin 68] - PB0 [pin 34] - PB1 [pin 35] - PB10 [pin 46] - PB11 [pin 47] - PB12 [pin 51] - PB13 [pin 52] - PB14 [pin 53] - PB15 [pin 54] - PB2 [pin 36] - PB3 [pin 89] - PB4 [pin 90] - PB5 [pin 91] - PB6 [pin 92] - PB7 [pin 93] - PB8 [pin 95] - PB9 [pin 96] - PC0 [pin 15] - PC1 [pin 16] - PC10 [pin 78] - PC11 [pin 79] - PC12 [pin 80] - PC13 [pin 7] - PC14 [pin 8] - PC15 [pin 9] - PC2_C [pin 17] - PC3_C [pin 18] - PC4 [pin 32] - PC5 [pin 33] - PC6 [pin 63] - PC7 [pin 64] - PC8 [pin 65] - PC9 [pin 66] - PD0 [pin 81] - PD1 [pin 82] - PD10 [pin 57] - PD11 [pin 58] - PD12 [pin 59] - PD13 [pin 60] - PD14 [pin 61] - PD15 [pin 62] - PD2 [pin 83] - PD3 [pin 84] - PD4 [pin 85] - PD5 [pin 86] - PD6 [pin 87] - PD7 [pin 88] - PD8 [pin 55] - PD9 [pin 56] - PE0 [pin 97] - PE1 [pin 98] - PE10 [pin 40] - PE11 [pin 41] - PE12 [pin 42] - PE13 [pin 43] - PE14 [pin 44] - PE15 [pin 45] - PE2 [pin 1] - PE3 [pin 2] - PE4 [pin 3] - PE5 [pin 4] - PE6 [pin 5] - PE7 [pin 37] - PE8 [pin 38] - PE9 [pin 39] - PH0 [pin 12] - PH1 [pin 13] - VBAT [pin 6] - VCAP1 [pin 48] - VCAP2 [pin 73] - VDD [pin 11] - VDD [pin 100] - VDD [pin 27] - VDD [pin 75] - VDD [pin 50] - VDDA [pin 21] - VREF+ [pin 20] - VSS [pin 74] - VSS [pin 49] - VSS [pin 99] - VSS [pin 10] - VSS [pin 26] - VSSA [pin 19] ### U2 — [TPS54331DR](https://www.flux.ai/vasy_skral/tps54331dr~8qb.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Integrated Circuit - Manufacturer Name: Texas Instruments - Datasheet URL: https://www.ti.com/lit/ds/symlink/tps54331.pdf - Manufacturer Part Number: TPS54331DR - Role Details: TPS54331DR 3A adjustable buck, configured for 5V output; Digi-Key/Mouser availability indicated by library metadata - Role: 5V Buck Regulator **Pins:** - BOOT [pin 1] - COMP [pin 6] - EN [pin 3] - GND [pin 7] - PH [pin 8] - SS [pin 4] - VIN [pin 2] - VSENSE [pin 5] ### U3 — [AP2112K-3.3TRG1](https://www.flux.ai/adrian95/ap2112k-33trg1~zlq.md) - Manufacturer Part Number: AP2112K-3.3TRG1 - Role Details: AP2112K-3.3TRG1 600mA LDO for STM32 3.3V digital rail; Digi-Key/Mouser availability indicated by library metadata - License: https://creativecommons.org/licenses/by/4.0/ - Role: 3V3 Digital LDO - Symbol Style: parametric-v1 - Part Type: Integrated Circuit - Datasheet URL: https://www.diodes.com/assets/Datasheets/AP2112.pdf - Manufacturer Name: Diodes Incorporated **Pins:** - EN [pin 3] - GND [pin 2] - NC [pin 4] - VIN [pin 1] - VOUT [pin 5] ### Y1 — [ABM8G-25.000MHZ-18-D2Y-T](https://www.flux.ai/adrian95/abm8g-25p000mhz-18-d2y-t~mbw.md) - Role Details: 25MHz HSE crystal, 18pF load; Mouser availability indicated by library metadata - Role: HSE Crystal - Datasheet URL: https://abracon.com/Resonators/ABM8G.pdf - Manufacturer Name: ABRACON - Package or Case Code: ABM8G - Part Type: Oscillator - Frequency: 25MHz - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: ABM8G-25.000MHZ-18-D2Y-T **Pins:** - GND_1 [pin 2] - GND_2 [pin 4] - XTAL_1 [pin 1] - XTAL_2 [pin 3] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/anahatasri/board-a-lv-controller~p3](https://www.flux.ai/anahatasri/board-a-lv-controller~p3).* --- *Generated from [https://www.flux.ai/anahatasri/board-a-lv-controller~p3](https://www.flux.ai/anahatasri/board-a-lv-controller~p3)*