agrif/bluegrass2an STM32 board with on-board battery charging
Stm32-battery is an open-source printed circuit board by agrif, from the agrif/bluegrass repository on GitHub. It is a 4-layer board of 61 × 88.9 mm with 117 parts on 94 nets, routed with 1,141 tracks and 197 vias.
It is built around the STM32F103CBT6, TPS63020DSJR and BQ24074RGTR, with the MAX17048G+T10, SMF05CT1G and USBLC6-2SC6 among its other parts. Its parts include 34 resistors, 29 capacitors, 8 connectors, 7 ICs and 5 diodes. It belongs with the power boards and the STM32 boards of this library.
This is an STM32 board (a la "Blue Pill") with built-in circuitry to charge a single-cell lithium battery, over USB or DC input. It provides 5V and 3.3V both at 1A, low standby current, battery fuel gauging, and supports charging from a solar panel.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 100nF | Capacitor_SMD:C_0603_1608Metric | C2, C5, C6, C7, C8, C9, C14, C15, C21, C28, C29 |
| 10 | 10k | Resistor_SMD:R_0603_1608Metric | R1, R2, R8, R9, R10, R11, R12, R20, R21, R23 |
| 7 | 10µF | Capacitor_SMD:C_0805_2012Metric | C3, C18, C19, C20, C25, C26, C27 |
| 4 | 1k | Resistor_SMD:R_0603_1608Metric | R25, R28, R29, R30 |
| 4 | M3 | MountingHole:MountingHole_3.2mm_M3_Pad | H1, H2, H3, H4 |
| 3 | 1M | Resistor_SMD:R_0603_1608Metric | R18, R19, R32 |
| 2 | 1.5k | Resistor_SMD:R_0603_1608Metric | R7, R16 |
| 2 | 10pF | Capacitor_SMD:C_0603_1608Metric | C10, C11 |
| 2 | 180k | Resistor_SMD:R_0603_1608Metric | R22, R34 |
| 2 | 1µF | Capacitor_SMD:C_0805_2012Metric | C4, C16 |
| 2 | 1µH | local-footprints:SWPA6020S | L1, L2 |
| 2 | 22µF | Capacitor_SMD:C_1206_3216Metric | C17, C24 |
| 2 | 4.7k | Resistor_SMD:R_0603_1608Metric | R5, R6 |
| 2 | 4.7µF | Capacitor_SMD:C_0805_2012Metric | C22, C23 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R14, R15 |
| 2 | 6pF | Capacitor_SMD:C_0603_1608Metric | C12, C13 |
| 2 | SS54 | Diode_SMD:D_SMA | D2, D3 |
| 2 | TPS63020DSJR | local-footprints:Texas_R-PVSON-N14_ThermalVias | U4, U6 |
| 1 | +3.3V | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP2 |
| 1 | +3.3V/PG | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP5 |
| 1 | +4V | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP4 |
| 1 | +5V | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP8 |
| 1 | +5V/PG | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP9 |
| 1 | +BATT | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP6 |
| 1 | 0 | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 0.5A | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | JP7 |
| 1 | 1.5A | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP5 |
| 1 | 1.5M | Resistor_SMD:R_0603_1608Metric | R31 |
| 1 | 100k | Resistor_SMD:R_0603_1608Metric | R33 |
| 1 | 10nF | Capacitor_SMD:C_0805_2012Metric | C1 |
| 1 | 16MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 1A | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP6 |
| 1 | 270 | Resistor_SMD:R_0603_1608Metric | R24 |
| 1 | 2k | Resistor_SMD:R_0603_1608Metric | R26 |
| 1 | 300 | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 32.768kHz | Crystal:Crystal_SMD_2012-2Pin_2.0x1.2mm | Y2 |
| 1 | 330 | Resistor_SMD:R_0603_1608Metric | R27 |
| 1 | 33k | Resistor_SMD:R_0603_1608Metric | R13 |
| 1 | 600Ω @ 100MHz | Inductor_SMD:L_0805_2012Metric | FB1 |
| 1 | 82k | Resistor_SMD:R_0603_1608Metric | R17 |
| 1 | BATT | Connector_JST:JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J8 |
| 1 | BOOT0 | Jumper:SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm | JP1 |
| 1 | BQ24074RGT | Package_DFN_QFN:VQFN-16-1EP_3x3mm_P0.5mm_EP1.6x1.6mm_ThermalVias | U5 |
| 1 | CHG | LED_SMD:LED_0805_2012Metric | D4 |
| 1 | DC In | Connector_BarrelJack:BarrelJack_Horizontal | J7 |
| 1 | FUEL | Jumper:SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm | JP8 |
| 1 | GND | TestPoint:TestPoint_THTPad_1.0x1.0mm_Drill0.5mm | TP7 |
| 1 | ITERM | Jumper:SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm | JP2 |
| 1 | Left | Connector_PinHeader_2.54mm:PinHeader_1x22_P2.54mm_Vertical | J2 |
| 1 | MAX17048G+ | local-footprints:MAX17048-TDFN-8 | U7 |
| 1 | Micro SD | local-footprints:SOFNG-TF-15x15 | J5 |
| 1 | NetTie_2 | NetTie:NetTie-2_SMD_Pad2.0mm | NT1 |
| 1 | PWR | LED_SMD:LED_0805_2012Metric | D5 |
| 1 | Reset | local-footprints:TS-1187A-B-A-B | SW1 |
| 1 | Right | Connector_PinHeader_2.54mm:PinHeader_1x22_P2.54mm_Vertical | J3 |
| 1 | SMF05CT1G | Package_TO_SOT_SMD:SOT-363_SC-70-6 | U2 |
| 1 | STM32F103CBT6 | Package_QFP:LQFP-48_7x7mm_P0.5mm | U1 |
| 1 | SWD | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J1 |
| 1 | Stemma I2C | Connector_JST:JST_PH_S4B-PH-K_1x04_P2.00mm_Horizontal | J4 |
| 1 | TMR | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | JP3 |
| 1 | TS | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | JP4 |
| 1 | USB-C | Connector_USB:USB_C_Receptacle_XKB_U262-16XN-4BVC11 | J6 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U3 |
| 1 | USR | LED_SMD:LED_0805_2012Metric | D1 |
| 1 | VBUS | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP1 |
| 1 | VDC | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP3 |
| 1 | Val** | local-footprints:Rakeri-10mm | Ref** |
| 1 | ~{ALRT} | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP10 |
The 113 most common of 117 parts.
It measures 61 × 88.9 mm and has 4 copper layers, 1.61 mm thick.
117 parts, built around the STM32F103CBT6, TPS63020DSJR, BQ24074RGTR and MAX17048G+T10. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
From the agrif/bluegrass repository on GitHub, at the commit this page was made from: the board is hardware/stm32-battery.kicad_pcb and its schematic hardware/stm32-battery-power.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask agrif before reusing the design.
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