C5 Capacitor Overview

4:16

Chat History

Project

Schematic

Clarifying component details.

Asking for clarification on pinouts.

Confirming component scope.

Retrieving pinouts for components.

Using Schematic Tool.

Using Knowledge Base Tool.

Planning pinout retrieval.

I compiled the project pin-to-net mapping for the key components and all 32 MOSFET channels. This reflects the actual schematic connectivity (best practice: ensure every harness pin and channel is fully mapped before layout/fab).

ESP32-S3 module

U1 ESP32-S3-WROOM-1-N16R8 | Pin | Net | |---|---| | 3V3 | 3V3 | | GND_1..GND_11 | GND | | EN, IOx, UARTx | (no explicit nets in current schematic unless shown elsewhere) |

3.3 V regulator

IC1 TPS62162QDSGRQ1 | Pin | Net | |---|---| | VIN | PACKP | | EN | SW1_EN | | VOS | 3V3 | | PGND, AGND, EP | GND | | SW, FB, PG | (no explicit nets shown in current page) |

I/O expanders

U2 MCP23017-E/SO (A-rail gates) | Pin | Net | |---|---| | VDD | 3V3 | | VSS | GND | | GPA0..GPA7 | GPA0, GPA1, GPA2, GPA3, GPA4, GPA5, GPA6, GPA7 | | GPB0..GPB7 | GPB0, GPB1, GPB2, GPB3, GPB4, GPB5, GPB6, GPB7 | | INTA, INTB, A0..A2, RESET, SI/SO/SCK/CS | (present; nets not shown here) |
U3 MCP23017-E/SO (B-rail gates) | Pin | Net | |---|---| | VDD | 3V3 | | VSS | GND | | GPA0..GPA7 | GPA0_2, GPA1_2, GPA2_2, GPA3_2, GPA4_2, GPA5_2, GPA6_2, GPA7_2 | | GPB0..GPB7 | GPB0_2, GPB1_2, GPB2_2, GPB3_2, GPB4_2, GPB5_2, GPB6_2, GPB7_2 |

6 V bucks (A and B rails)

U5 TPS54821RHLR (Rail A) | Pin | Net | |---|---| | PH_11, PH_12 | 6V_A_IN | | PVIN_4, PVIN_5 | PACKP | | GND_2, GND_3, EXP* | GND | | EN, VSENSE, COMP, SS/TR, PWRGD, BOOT, VIN, RT/CLK | (not shown here) |
U6 TPS54821RHLR (Rail B) | Pin | Net | |---|---| | PH_11, PH_12 | 6V_B_IN | | PVIN_4, PVIN_5 | PACKP | | GND_2, GND_3, EXP* | GND | | EN, VSENSE, COMP, SS/TR, PWRGD, BOOT, VIN, RT/CLK | (not shown here) |

eFuses (protected power path)

U7 TPS259824ONRGER (A rail) | Pin | Net | |---|---| | IN_1, IN_2 | 6V_A_IN | | OUT_1 | Net 1 | | GND_* | GND | | EN/UVLO, ILIM, DVDT, PG, etc. | (not shown here) |
U8 TPS259824ONRGER (B rail) | Pin | Net | |---|---| | IN_1, IN_2 | 6V_B_IN | | OUT_1 | GND (note: currently tied to GND in schematic; likely unintended) | | GND_* | GND | | EN/UVLO, ILIM, DVDT, PG, etc. | (not shown here) |

Charger and protector

U10 BQ24618RGET | Pin | Net | |---|---| | STAT1 | STAT1 | | VCC | VDD1 | | GND, EP | GND | | Others | (not shown here) |
U11 BQ29209DRBT | Pin | Net | |---|---| | VC1 | CELL_MID | | GND (VSS) | GND | | VC2, VDD, OUT, CB_EN, CD, VC1_CB, EP | (not shown here) |

Switches

SW1 R1966ABLKBLKEF | Pin | Net | |---|---| | 1 | SW1_EN (to IC1 EN) | | 2 | GND |
SW2 PB400EEQR1BLK (DPST ground interlock) | Pin | Net | |---|---| | 1 | GND (pole A out) | | 2 | J2_GND_RET (pole A in) | | 3 | GND (pole B out) | | 4 | J3_GND_RET (pole B in) |

Headers

J1 PJ-011A Barrel Jack | Pin | Net | |---|---| | 1 | VDD1 | | 2 | VDD1 | | 3 | (not shown) |
J2 2×10 header (A channels) | Pin | Net | Pin | Net | |---|---|---|---| | 1 | FIRE_A1 | 11 | FIRE_A9 | | 2 | FIRE_A2 | 12 | FIRE_A10 | | 3 | FIRE_A3 | 13 | FIRE_A11 | | 4 | FIRE_A4 | 14 | FIRE_A12 | | 5 | J2_GND_RET | 15 | J2_GND_RET | | 6 | FIRE_A5 | 16 | FIRE_A13 | | 7 | FIRE_A6 | 17 | FIRE_A14 | | 8 | FIRE_A7 | 18 | FIRE_A15 | | 9 | FIRE_A8 | 19 | FIRE_A16 | | 10 | J2_GND_RET | 20 | J2_GND_RET |
J3 2×10 header (B channels) | Pin | Net | Pin | Net | |---|---|---|---| | 1 | FIRE_B1 | 11 | FIRE_B9 | | 2 | FIRE_B2 | 12 | FIRE_B10 | | 3 | FIRE_B3 | 13 | FIRE_B11 | | 4 | FIRE_B4 | 14 | FIRE_B12 | | 5 | J3_GND_RET | 15 | J3_GND_RET | | 6 | FIRE_B5 | 16 | FIRE_B13 | | 7 | FIRE_B6 | 17 | FIRE_B14 | | 8 | FIRE_B7 | 18 | FIRE_B15 | | 9 | FIRE_B8 | 19 | FIRE_B16 | | 10 | J3_GND_RET | 20 | J3_GND_RET |

MOSFET channels (low-side)

Package and mapping are uniform: G=pin1, D=pin2, S=pin3 (per part properties). Sources are on GND; drains go to header pins; gates are on MCP23017 nets.

Table

MOSFET	Gate net	Drain net	Source net
Q1	GPB0	FIRE_A1	GND
Q2	GPB1	FIRE_A2	GND
Q3	GPB2	FIRE_A3	GND
Q4	GPB3	FIRE_A4	GND
Q5	GPB4	FIRE_A5	GND
Q6	GPB5	FIRE_A6	GND
Q7	GPB6	FIRE_A7	GND
Q8	GPB7	FIRE_A8	GND
Q9	GPA0	FIRE_A9	GND
Q10	GPA1	FIRE_A10	GND
Q11	GPA2	FIRE_A11	GND
Q12	GPA3	FIRE_A12	GND
Q13	GPA4	FIRE_A13	GND
Q14	GPA5	FIRE_A14	GND
Q15	GPA6	FIRE_A15	GND
Q16	GPA7	FIRE_A16	GND
Q17	GPB0_2	FIRE_B1	GND
Q18	GPB1_2	FIRE_B2	GND
Q19	GPB2_2	FIRE_B3	GND
Q20	GPB3_2	FIRE_B4	GND
Q21	GPB4_2	FIRE_B5	GND
Q22	GPB5_2	FIRE_B6	GND
Q23	GPB6_2	FIRE_B7	GND
Q24	GPB7_2	FIRE_B8	GND
Q25	GPA0_2	FIRE_B9	GND
Q26	GPA1_2	FIRE_B10	GND
Q27	GPA2_2	FIRE_B11	GND
Q28	GPA3_2	FIRE_B12	GND
Q29	GPA4_2	FIRE_B13	GND
Q30	GPA5_2	FIRE_B14	GND
Q31	GPA6_2	FIRE_B15	GND
Q32	GPA7_2	FIRE_B16	GND

Barrel jack and rail/power overview

J1 pins 1–2 are VDD1 (to U10:VCC).
Rails: PACKP feeds both bucks U5/U6; eFuse inputs are 6V_A_IN and 6V_B_IN. SW2 interlocks J2/J3 returns to GND.

Notes and one anomaly to review

U8:OUT_1 currently appears on GND in the schematic netlist. That would short the B rail output to ground, which is almost certainly unintended. Do you want me to correct that connection to the intended “6V_B_SWITCHED” net?

Would you like me to:

Add datasheet-backed functional pin descriptions for the major ICs (ESP32 module, MCP23017, TPS54821, TPS259824, TPS62162, BQ24618, BQ29209)?
Expand pin-to-net tables for remaining parts (connectors, passives not typically listed)?

Export as CSV table

Fix U8 OUT net

Add functional descriptions

Verify header mapping

27 days

Plan completed.

Show Plan

Reviews

Ground
A common return path for electric current. Commonly known as ground.
jharwinbarrozo
20.5M
Net Portal
Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
jharwinbarrozo
43.0M
Power Net Portal
Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #power
jharwinbarrozo
11.4M
Generic Resistor
A generic fixed resistor for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0Ω 10Ω 100Ω 1.0kΩ 10kΩ 100kΩ 1.0MΩ 1.1Ω 11Ω 110Ω 1.1kΩ 11kΩ 110kΩ 1.1MΩ 1.2Ω 12Ω 120Ω 1.2kΩ 12kΩ 120kΩ 1.2MΩ 1.3Ω 13Ω 130Ω 1.3kΩ 13kΩ 130kΩ 1.3MΩ 1.5Ω 15Ω 150Ω 1.5kΩ 15kΩ 150kΩ 1.5MΩ 1.6Ω 16Ω 160Ω 1.6kΩ 16kΩ 160kΩ 1.6MΩ 1.8Ω 18Ω 180Ω 1.8KΩ 18kΩ 180kΩ 1.8MΩ 2.0Ω 20Ω 200Ω 2.0kΩ 20kΩ 200kΩ 2.0MΩ 2.2Ω 22Ω 220Ω 2.2kΩ 22kΩ 220kΩ 2.2MΩ 2.4Ω 24Ω 240Ω 2.4kΩ 24kΩ 240kΩ 2.4MΩ 2.7Ω 27Ω 270Ω 2.7kΩ 27kΩ 270kΩ 2.7MΩ 3.0Ω 30Ω 300Ω 3.0KΩ 30KΩ 300KΩ 3.0MΩ 3.3Ω 33Ω 330Ω 3.3kΩ 33kΩ 330kΩ 3.3MΩ 3.6Ω 36Ω 360Ω 3.6kΩ 36kΩ 360kΩ 3.6MΩ 3.9Ω 39Ω 390Ω 3.9kΩ 39kΩ 390kΩ 3.9MΩ 4.3Ω 43Ω 430Ω 4.3kΩ 43KΩ 430KΩ 4.3MΩ 4.7Ω 47Ω 470Ω 4.7kΩ 47kΩ 470kΩ 4.7MΩ 5.1Ω 51Ω 510Ω 5.1kΩ 51kΩ 510kΩ 5.1MΩ 5.6Ω 56Ω 560Ω 5.6kΩ 56kΩ 560kΩ 5.6MΩ 6.2Ω 62Ω 620Ω 6.2kΩ 62KΩ 620KΩ 6.2MΩ 6.8Ω 68Ω 680Ω 6.8kΩ 68kΩ 680kΩ 6.8MΩ 7.5Ω 75Ω 750Ω 7.5kΩ 75kΩ 750kΩ 7.5MΩ 8.2Ω 82Ω 820Ω 8.2kΩ 82kΩ 820kΩ 8.2MΩ 9.1Ω 91Ω 910Ω 9.1kΩ 91kΩ 910kΩ 9.1MΩ #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Capacitor
A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF 10pF 100pF 1000pF 0.01uF 0.1uF 1.0uF 10uF 100uF 1000uF 10,000uF 1.1pF 11pF 110pF 1100pF 1.2pF 12pF 120pF 1200pF 1.3pF 13pF 130pF 1300pF 1.5pF 15pF 150pF 1500pF 0.015uF 0.15uF 1.5uF 15uF 150uF 1500uF 1.6pF 16pF 160pF 1600pF 1.8pF 18pF 180pF 1800pF 2.0pF 20pF 200pF 2000pF 2.2pF 22pF 20pF 2200pF 0.022uF 0.22uF 2.2uF 22uF 220uF 2200uF 2.4pF 24pF 240pF 2400pF 2.7pF 27pF 270pF 2700pF 3.0pF 30pF 300pF 3000pF 3.3pF 33pF 330pF 3300pF 0.033uF 0.33uF 3.3uF 33uF 330uF 3300uF 3.6pF 36pF 360pF 3600pF 3.9pF 39pF 390pF 3900pF 4.3pF 43pF 430pF 4300pF 4.7pF 47pF 470pF 4700pF 0.047uF 0.47uF 4.7uF 47uF 470uF 4700uF 5.1pF 51pF 510pF 5100pF 5.6pF 56pF 560pF 5600pF 6.2pF 62pF 620pF 6200pF 6.8pF 68pF 680pF 6800pF 0.068uF 0.68uF 6.8uF 68uF 680uF 6800uF 7.5pF 75pF 750pF 7500pF 8.2pF 82pF 820pF 8200pF 9.1pF 91pF 910pF 9100pF #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Inductor
A generic fixed inductor for rapid developing circuit topology. *You can now change the footprint and 3D model at the top level anytime you want. This is the power of #generics
jharwinbarrozo
15.6k
Terminal
An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
natarius
RMCF0805JT47K0
47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
jharwinbarrozo
1.2M
875105359001
10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
jharwinbarrozo
1.2M
CTL1206FYW1T
Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
jharwinbarrozo
1.1M

Project Name

Dominant Plum Speeder Bike

Description

3.3V ESP32-S3 Dual 6V Rail MOSFET Board with MCP23017 I2C Expanders, Option C Gate Network, SW2 DPST Rail-Interlock, 2S LiFePO4 Charger/BMS (BQ24618 + BQ29209) with Series Battery Wiring and Charge Integration, and 2×10 RA Headers (#MCP23017_3V3 #OptionC #GateNetwork #RailInterlock #Dual6V #BQ24618 #BQ29209 #2S #LiFePO4 #SeriesBattery #ChargeIntegration #RAHeaders)

Properties

Rail Configuration

Operating Voltage

Connectivity

Protection Scheme

License

Software

Part Type

System Ar…itecture

Domain

Referenc…ign URL

Manufact… Target

Power R…rements

Microcontroller

Charging Input

Energy Storage

I2C Expansion

Human Interface

Power So…emistry

Pricing & Availability

Distributor	Qty 1
Arrow	$76.58–$85.62
Digi-Key	$33.38–$868.41
LCSC	$48.10
Mouser	$54.33–$926.63
TME	$5.86
Verical	$234.11–$262.64

Assets

No assets added.

Controls

Welcome 👋

Flux helps you build PCBs faster with an AI teammate!

Create your account to collaborate, stay updated, fork your own version, and get instant answers from our AI agent.