board
Solar MPPT Power System
Public Unreviewedby TylerK
A 30 W solar battery charger with regulated 5 V and 3.3 V rails: an STM32G031 running perturb & observe MPPT and a CC/CV charge state machine, steering a TI LM5175 4-switch buck-boost through a single analog control input. Four-layer KiCad board, schematic and PCB generated from Python, with an electrothermal simulation run against the published board file.
main
TylerK
Replace discrete-analog board with MCU/IC redesign: STM32G031 P&O MPPT + CC/CV firmware, LM5175 buck-boost, INA180 curr…
e48ba30
1mo ago
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{
"components": {
"C1": {
"value": "10n",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"C2": {
"value": "100u",
"footprint": "Capacitor_SMD:CP_Elec_6.3x5.8"
},
"C3": {
"value": "100u",
"footprint": "Capacitor_SMD:CP_Elec_6.3x5.8"
},
"C4": {
"value": "1u",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"C5": {
"value": "1u",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"C6": {
"value": "10u",
"footprint": "Capacitor_SMD:C_1206_3216Metric"
},
"C7": {
"value": "100n",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"C8": {
"value": "1n",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"C9": {
"value": "1u",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"C10": {
"value": "10u",
"footprint": "Capacitor_SMD:C_1206_3216Metric"
},
"C11": {
"value": "10u",
"footprint": "Capacitor_SMD:C_1206_3216Metric"
},
"C12": {
"value": "1n",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"C13": {
"value": "10n",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"C14": {
"value": "2.2n",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"C15": {
"value": "1u",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"C16": {
"value": "100n",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"C17": {
"value": "100n",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"C18": {
"value": "100u",
"footprint": "Capacitor_SMD:CP_Elec_6.3x5.8"
},
"C19": {
"value": "100u",
"footprint": "Capacitor_SMD:CP_Elec_6.3x5.8"
},
"C20": {
"value": "1u",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"C21": {
"value": "100n",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"C22": {
"value": "100u",
"footprint": "Capacitor_SMD:CP_Elec_6.3x5.8"
},
"C23": {
"value": "100n",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"C24": {
"value": "100n",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"C25": {
"value": "1u",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"C26": {
"value": "100n",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"C27": {
"value": "10u",
"footprint": "Capacitor_SMD:C_1206_3216Metric"
},
"C28": {
"value": "10n",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"C29": {
"value": "47u",
"footprint": "Capacitor_SMD:C_1206_3216Metric"
},
"C30": {
"value": "1u",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"C31": {
"value": "10u",
"footprint": "Capacitor_SMD:C_1206_3216Metric"
},
"C32": {
"value": "22u",
"footprint": "Capacitor_SMD:C_1206_3216Metric"
},
"C33": {
"value": "1u",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"C34": {
"value": "100n",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"C35": {
"value": "100n",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"D1": {
"value": "BZT52C15 (15V)",
"footprint": "Diode_SMD:D_SOD-123"
},
"D2": {
"value": "SMBJ33A (33V)",
"footprint": "Diode_SMD:D_SMB"
},
"D3": {
"value": "BAT54",
"footprint": "Diode_SMD:D_SOD-123"
},
"D4": {
"value": "BAT54",
"footprint": "Diode_SMD:D_SOD-123"
},
"F1": {
"value": "6.3A",
"footprint": "Fuse:Fuseholder_Clip-5x20mm_Keystone_3512_Inline_P23.62x7.27mm_D1.02x1.57mm_Horizontal"
},
"FB1": {
"value": "600R@100MHz",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"FB2": {
"value": "600R@100MHz",
"footprint": "Capacitor_SMD:C_0805_2012Metric"
},
"J1": {
"value": "SOLAR_IN",
"footprint": "TerminalBlock_Phoenix:TerminalBlock_Phoenix_PT-1,5-2-3.5-H_1x02_P3.50mm_Horizontal"
},
"J2": {
"value": "BATTERY (12V SLA/AGM)",
"footprint": "TerminalBlock_Phoenix:TerminalBlock_Phoenix_PT-1,5-2-3.5-H_1x02_P3.50mm_Horizontal"
},
"J3": {
"value": "5V OUT / 2A",
"footprint": "TerminalBlock_Phoenix:TerminalBlock_Phoenix_PT-1,5-2-3.5-H_1x02_P3.50mm_Horizontal"
},
"J4": {
"value": "3.3V OUT / 1A",
"footprint": "TerminalBlock_Phoenix:TerminalBlock_Phoenix_PT-1,5-2-3.5-H_1x02_P3.50mm_Horizontal"
},
"J5": {
"value": "SWD",
"footprint": "Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical"
},
"J6": {
"value": "UART_DEBUG",
"footprint": "Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical"
},
"L1": {
"value": "22u",
"footprint": "Inductor_SMD:L_Sunlord_MWSA1005S"
},
"L2": {
"value": "68u (Isat>=6A)",
"footprint": "Inductor_SMD:L_Bourns-SRN1060"
},
"L3": {
"value": "4.7u (Isat>=3A)",
"footprint": "Inductor_SMD:L_Bourns_SRN6045TA"
},
"L4": {
"value": "2.2u (Isat>=1.5A)",
"footprint": "Inductor_SMD:L_Bourns-SRN4018"
},
"LED1": {
"value": "GREEN (charge)",
"footprint": "LED_SMD:LED_0805_2012Metric"
},
"LED2": {
"value": "RED (fault)",
"footprint": "LED_SMD:LED_0805_2012Metric"
},
"Q1": {
"value": "IRF3205 (55V NFET)",
"footprint": "Package_TO_SOT_THT:TO-220-3_Vertical"
},
"Q2": {
"value": "IRF3205 (leg1 HS)",
"footprint": "Package_TO_SOT_THT:TO-220-3_Vertical"
},
"Q3": {
"value": "IRF3205 (leg1 LS)",
"footprint": "Package_TO_SOT_THT:TO-220-3_Vertical"
},
"Q4": {
"value": "IRF3205 (leg2 HS)",
"footprint": "Package_TO_SOT_THT:TO-220-3_Vertical"
},
"Q5": {
"value": "IRF3205 (leg2 LS)",
"footprint": "Package_TO_SOT_THT:TO-220-3_Vertical"
},
"R1": {
"value": "100k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R2": {
"value": "40.2k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R3": {
"value": "10k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R4": {
"value": "4.99k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R5": {
"value": "10k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R6": {
"value": "0",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R7": {
"value": "100",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R8": {
"value": "100k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R9": {
"value": "10k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R10": {
"value": "150k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R11": {
"value": "20k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R12": {
"value": "10k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R13": {
"value": "46.4k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R14": {
"value": "10k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R15": {
"value": "10k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R16": {
"value": "46.4k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R17": {
"value": "10k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R18": {
"value": "10k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R19": {
"value": "46.4k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R20": {
"value": "10k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R22": {
"value": "10k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R23": {
"value": "1k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R24": {
"value": "1k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R25": {
"value": "61.9k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R26": {
"value": "10k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R27": {
"value": "10k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R28": {
"value": "20k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"R29": {
"value": "10k",
"footprint": "Resistor_SMD:R_0805_2012Metric"
},
"RS1": {
"value": "0.01 (2512, 1W)",
"footprint": "Resistor_SMD:R_2512_6332Metric"
},
"RS2": {
"value": "0.02 (2512, 1W)",
"footprint": "Resistor_SMD:R_2512_6332Metric"
},
"TP1": {
"value": "TP_PANEL_PROT",
"footprint": "TestPoint:TestPoint_Pad_D1.0mm"
},
"TP2": {
"value": "TP_VBATT",
"footprint": "TestPoint:TestPoint_Pad_D1.0mm"
},
"TP3": {
"value": "TP_V5V_OUT",
"footprint": "TestPoint:TestPoint_Pad_D1.0mm"
},
"TP4": {
"value": "TP_V3V3_OUT",
"footprint": "TestPoint:TestPoint_Pad_D1.0mm"
},
"U1": {
"value": "LM74700",
"footprint": "Package_TO_SOT_SMD:SOT-23-6"
},
"U2": {
"value": "LM5165 (wide-Vin micro-buck)",
"footprint": "Package_SON:Texas_S-PVSON-N10"
},
"U3": {
"value": "AMS1117-3.3",
"footprint": "Package_TO_SOT_SMD:SOT-223-3_TabPin2"
},
"U4": {
"value": "LM5175 (4-switch sync buck-boost)",
"footprint": "Package_SO:HTSSOP-28-1EP_4.4x9.7mm_P0.65mm_EP2.75x6.2mm_ThermalVias"
},
"U5": {
"value": "INA180A1 (Iin, x20V/V)",
"footprint": "Package_TO_SOT_SMD:SOT-23-5"
},
"U6": {
"value": "INA180A1 (Ichg, x20V/V)",
"footprint": "Package_TO_SOT_SMD:SOT-23-5"
},
"U7": {
"value": "STM32G031F8Px",
"footprint": "Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm"
},
"U8": {
"value": "TPS62130 (5V/2A buck)",
"footprint": "Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.45x1.45mm"
},
"U9": {
"value": "TLV62569 (3.3V/1A buck)",
"footprint": "Package_TO_SOT_SMD:SOT-563"
}
},
"ref_pin_nets": {
"R5": {
"2": "/BIAS_PGOOD",
"1": "Net-(U3-VI)"
},
"U2": {
"6": "/BIAS_PGOOD",
"2": "/PANEL_PROT",
"7": "/PANEL_PROT",
"10": "GND",
"11": "GND",
"8": "Net-(U2-FB)",
"9": "Net-(U2-HYS)",
"3": "Net-(U2-ILIM)",
"4": "Net-(U2-SS)",
"1": "Net-(U2-SW)",
"5": "unconnected-(U2-RT-Pad5)"
},
"U7": {
"20": "/BIAS_PGOOD",
"9": "/ICHG_SENSE",
"8": "/IIN_SENSE",
"15": "/MPPT_PGOOD",
"17": "/UART_RX",
"16": "/UART_TX",
"7": "/VBATT_SENSE",
"5": "GND",
"4": "Net-(J5-Pin_1)",
"18": "Net-(J5-Pin_2)",
"19": "Net-(J5-Pin_3)",
"11": "Net-(U7-PA4)",
"13": "Net-(U7-PA6)",
"14": "Net-(U7-PA7)",
"10": "unconnected-(U7-PA3-Pad10)",
"12": "unconnected-(U7-PA5-Pad12)",
"1": "unconnected-(U7-PB7{slash}PB8-Pad1)",
"2": "unconnected-(U7-PB9{slash}PC14-Pad2)",
"3": "unconnected-(U7-PC15-Pad3)",
"6": "unconnected-(U7-PF2-Pad6)"
},
"U6": {
"1": "/ICHG_SENSE",
"4": "/VBATT",
"2": "GND",
"3": "Net-(Q4-D)",
"5": "Net-(U3-VI)"
},
"U5": {
"1": "/IIN_SENSE",
"3": "/PANEL_PROT",
"2": "GND",
"4": "Net-(Q2-D)",
"5": "Net-(U3-VI)"
},
"C26": {
"1": "/MCU_MPPT_REF",
"2": "GND"
},
"R15": {
"2": "/MCU_MPPT_REF",
"1": "Net-(U4-FB)"
},
"R22": {
"2": "/MCU_MPPT_REF",
"1": "Net-(U7-PA4)"
},
"R18": {
"2": "/MPPT_PGOOD",
"1": "Net-(U3-VI)"
},
"U4": {
"17": "/MPPT_PGOOD",
"14": "/PANEL_PROT",
"10": "GND",
"15": "GND",
"16": "GND",
"22": "GND",
"29": "GND",
"4": "GND",
"5": "GND",
"23": "Net-(D3-A)",
"26": "Net-(D3-K)",
"20": "Net-(D4-K)",
"13": "Net-(Q2-D)",
"2": "Net-(Q2-D)",
"27": "Net-(Q2-G)",
"28": "Net-(Q2-S)",
"25": "Net-(Q3-G)",
"19": "Net-(Q4-G)",
"18": "Net-(Q4-S)",
"21": "Net-(Q5-G)",
"24": "Net-(U3-VI)",
"9": "Net-(U4-COMP)",
"1": "Net-(U4-EN{slash}UVLO)",
"11": "Net-(U4-FB)",
"6": "Net-(U4-RT{slash}SYNC)",
"7": "Net-(U4-SLOPE)",
"8": "Net-(U4-SS)",
"3": "Net-(U4-VISNS)",
"12": "Net-(U4-VOSNS)"
},
"C1": {
"2": "/PANEL_PROT",
"1": "Net-(U1-VCAP)"
},
"C2": {
"1": "/PANEL_PROT",
"2": "GND"
},
"C3": {
"1": "/PANEL_PROT",
"2": "GND"
},
"C4": {
"1": "/PANEL_PROT",
"2": "GND"
},
"C5": {
"1": "/PANEL_PROT",
"2": "GND"
},
"D2": {
"1": "/PANEL_PROT",
"2": "GND"
},
"Q1": {
"3": "/PANEL_PROT",
"1": "Net-(D1-A)",
"2": "Net-(D1-K)"
},
"RS1": {
"1": "/PANEL_PROT",
"2": "Net-(Q2-D)"
},
"TP1": {
"1": "/PANEL_PROT"
},
"U1": {
"4": "/PANEL_PROT",
"2": "GND",
"5": "Net-(D1-A)",
"6": "Net-(D1-K)",
"3": "Net-(U1-EN)",
"1": "Net-(U1-VCAP)"
},
"J6": {
"3": "/UART_RX",
"2": "/UART_TX",
"1": "GND"
},
"C35": {
"1": "/V3V3_OUT",
"2": "GND"
},
"FB2": {
"2": "/V3V3_OUT",
"1": "Net-(C32-Pad1)"
},
"J4": {
"1": "/V3V3_OUT",
"2": "GND"
},
"TP4": {
"1": "/V3V3_OUT"
},
"C34": {
"1": "/V5V_OUT",
"2": "GND"
},
"FB1": {
"2": "/V5V_OUT",
"1": "Net-(U8-VOS)"
},
"J3": {
"1": "/V5V_OUT",
"2": "GND"
},
"TP3": {
"1": "/V5V_OUT"
},
"R27": {
"2": "/V5V_PGOOD",
"1": "Net-(U8-VOS)"
},
"U8": {
"4": "/V5V_PGOOD",
"10": "/VBATT",
"11": "/VBATT",
"12": "/VBATT",
"13": "/VBATT",
"15": "GND",
"16": "GND",
"17": "GND",
"6": "GND",
"7": "GND",
"8": "GND",
"1": "Net-(L3-Pad1)",
"2": "Net-(L3-Pad1)",
"3": "Net-(L3-Pad1)",
"5": "Net-(U8-FB)",
"9": "Net-(U8-SS{slash}TR)",
"14": "Net-(U8-VOS)"
},
"C22": {
"1": "/VBATT",
"2": "GND"
},
"C27": {
"1": "/VBATT",
"2": "GND"
},
"C31": {
"1": "/VBATT",
"2": "GND"
},
"J2": {
"1": "/VBATT",
"2": "GND"
},
"R19": {
"1": "/VBATT",
"2": "/VBATT_SENSE"
},
"RS2": {
"2": "/VBATT",
"1": "Net-(Q4-D)"
},
"TP2": {
"1": "/VBATT"
},
"U9": {
"3": "/VBATT",
"5": "/VBATT",
"2": "GND",
"1": "Net-(U9-FB)",
"4": "Net-(U9-SW)",
"6": "unconnected-(U9-NC-Pad6)"
},
"R20": {
"1": "/VBATT_SENSE",
"2": "GND"
},
"C10": {
"2": "GND",
"1": "Net-(J5-Pin_1)"
},
"C11": {
"2": "GND",
"1": "Net-(Q2-D)"
},
"C12": {
"2": "GND",
"1": "Net-(U4-VISNS)"
},
"C13": {
"2": "GND",
"1": "Net-(U4-SS)"
},
"C14": {
"2": "GND",
"1": "Net-(C14-Pad1)"
},
"C15": {
"2": "GND",
"1": "Net-(D3-A)"
},
"C18": {
"2": "GND",
"1": "Net-(Q4-D)"
},
"C19": {
"2": "GND",
"1": "Net-(Q4-D)"
},
"C20": {
"2": "GND",
"1": "Net-(Q4-D)"
},
"C21": {
"2": "GND",
"1": "Net-(U3-VI)"
},
"C23": {
"2": "GND",
"1": "Net-(U3-VI)"
},
"C24": {
"2": "GND",
"1": "Net-(J5-Pin_1)"
},
"C25": {
"2": "GND",
"1": "Net-(J5-Pin_1)"
},
"C28": {
"2": "GND",
"1": "Net-(U8-SS{slash}TR)"
},
"C29": {
"2": "GND",
"1": "Net-(U8-VOS)"
},
"C30": {
"2": "GND",
"1": "Net-(U8-VOS)"
},
"C32": {
"2": "GND",
"1": "Net-(C32-Pad1)"
},
"C33": {
"2": "GND",
"1": "Net-(C32-Pad1)"
},
"C6": {
"2": "GND",
"1": "Net-(U3-VI)"
},
"C7": {
"2": "GND",
"1": "Net-(U3-VI)"
},
"C8": {
"2": "GND",
"1": "Net-(U2-SS)"
},
"C9": {
"2": "GND",
"1": "Net-(U3-VI)"
},
"J1": {
"2": "GND",
"1": "Net-(J1-Pin_1)"
},
"J5": {
"4": "GND",
"1": "Net-(J5-Pin_1)",
"2": "Net-(J5-Pin_2)",
"3": "Net-(J5-Pin_3)"
},
"LED1": {
"1": "GND",
"2": "Net-(LED1-A)"
},
"LED2": {
"1": "GND",
"2": "Net-(LED2-A)"
},
"Q3": {
"3": "GND",
"2": "Net-(Q2-S)",
"1": "Net-(Q3-G)"
},
"Q5": {
"3": "GND",
"2": "Net-(Q4-D)",
"1": "Net-(Q5-G)"
},
"R10": {
"2": "GND",
"1": "Net-(U4-RT{slash}SYNC)"
},
"R11": {
"2": "GND",
"1": "Net-(U4-SLOPE)"
},
"R14": {
"2": "GND",
"1": "Net-(U4-FB)"
},
"R17": {
"2": "GND",
"1": "Net-(U4-VOSNS)"
},
"R26": {
"2": "GND",
"1": "Net-(U8-FB)"
},
"R29": {
"2": "GND",
"1": "Net-(U9-FB)"
},
"R3": {
"2": "GND",
"1": "Net-(U2-FB)"
},
"R6": {
"2": "GND",
"1": "Net-(U2-HYS)"
},
"R9": {
"2": "GND",
"1": "Net-(U4-EN{slash}UVLO)"
},
"U3": {
"1": "GND",
"2": "Net-(J5-Pin_1)",
"3": "Net-(U3-VI)"
},
"R12": {
"2": "Net-(C14-Pad1)",
"1": "Net-(U4-COMP)"
},
"L4": {
"2": "Net-(C32-Pad1)",
"1": "Net-(U9-SW)"
},
"R28": {
"1": "Net-(C32-Pad1)",
"2": "Net-(U9-FB)"
},
"D1": {
"2": "Net-(D1-A)",
"1": "Net-(D1-K)"
},
"F1": {
"2": "Net-(D1-K)",
"1": "Net-(J1-Pin_1)"
},
"R1": {
"1": "Net-(D1-K)",
"2": "Net-(U1-EN)"
},
"D3": {
"2": "Net-(D3-A)",
"1": "Net-(D3-K)"
},
"D4": {
"2": "Net-(D3-A)",
"1": "Net-(D4-K)"
},
"C16": {
"1": "Net-(D3-K)",
"2": "Net-(Q2-S)"
},
"C17": {
"1": "Net-(D4-K)",
"2": "Net-(Q4-S)"
},
"L3": {
"1": "Net-(L3-Pad1)",
"2": "Net-(U8-VOS)"
},
"R23": {
"2": "Net-(LED1-A)",
"1": "Net-(U7-PA6)"
},
"R24": {
"2": "Net-(LED2-A)",
"1": "Net-(U7-PA7)"
},
"Q2": {
"2": "Net-(Q2-D)",
"1": "Net-(Q2-G)",
"3": "Net-(Q2-S)"
},
"R7": {
"1": "Net-(Q2-D)",
"2": "Net-(U4-VISNS)"
},
"R8": {
"1": "Net-(Q2-D)",
"2": "Net-(U4-EN{slash}UVLO)"
},
"L2": {
"1": "Net-(Q2-S)",
"2": "Net-(Q4-S)"
},
"Q4": {
"2": "Net-(Q4-D)",
"1": "Net-(Q4-G)",
"3": "Net-(Q4-S)"
},
"R13": {
"1": "Net-(Q4-D)",
"2": "Net-(U4-FB)"
},
"R16": {
"1": "Net-(Q4-D)",
"2": "Net-(U4-VOSNS)"
},
"R2": {
"2": "Net-(U2-FB)",
"1": "Net-(U3-VI)"
},
"R4": {
"2": "Net-(U2-ILIM)",
"1": "Net-(U3-VI)"
},
"L1": {
"1": "Net-(U2-SW)",
"2": "Net-(U3-VI)"
},
"R25": {
"2": "Net-(U8-FB)",
"1": "Net-(U8-VOS)"
}
}
}