Schematic Symbol for GPS01-TD-powered-sublayout: GPS01-TD module...

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You can connect the sublayout to the MCC board by feeding the 3.3V supply from the MCC into your sublayout's 3V3 power net. This means:

Power Connection:
- Use (or add) a terminal or net portal labeled 3V3 on your sublayout that is connected to the 3.3V rail.
- Wire the MCC board’s 3.3V output to this terminal so that the module and its supporting circuitry receive power from the external 3.3V supply.
Common Ground:
- Ensure that the ground (GND) from the MCC board is also tied to your sublayout's ground (using the proper c2e41937-4268-256c-7ae9-cb8cfb60aed3 component) so that both circuits share the same reference.

This approach lets you power the sublayout solely from the MCC board while maintaining the required connections for proper operation.

Would you like me to suggest schematic changes to add or adjust the net portal/terminal connecting the 3.3V supply?

296 days

maxjenkinsonn

can I run this layout without connecting the 5v terminal

296 days

flux

0:20

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Yes, you can run the layout without connecting the 5V terminal if your design only requires the 3.3V supply. Here are a few points to consider:

Unused Terminal:
If no components in your sublayout are actively using the 5V rail, leaving the 5V terminal unconnected is acceptable. However, make sure that none of the parts require a 5V input for proper operation.
DRC Considerations:
Leaving an expected net unconnected might trigger design rule check warnings. You can either ignore these if they're non-critical or update the schematic to mark the 5V terminal as unused or "No Connect" so that DRC rules do not flag it.
Power Integrity:
Ensure that any parts previously intended to be powered by 5V either operate correctly at 3.3V (if that’s within their acceptable range) or have alternate power configurations (e.g., via internal regulators).

Would you like to update the schematic to mark the 5V terminal as not used or to suppress its connection in DRC?

296 days

Ready.

can you verify that u2 r3 resistor value will output no more than 30ma charging ...

ril3y

@copilot can you verify that u2 r3 resistor value will output no more than 30ma charging current to the battery?

copilot

To calculate the charging current for the MCP73831-2ACI/MC (U2), we use the following formula from the MCP73831 datasheet:

I_{SET} = 1000V / R_{PROG}

Where:

I_{SET} is the charging current
R_{PROG} is the value of the programming resistor, which is R3 in this case

Given that R3 has a resistance of 33kΩ, we substitute it into the formula:

I_{SET} = 1000V / 33kΩ = 30.3mA

So, the charging current provided to the battery when using a 33kΩ resistor for R3 is approximately 30.3mA, which is just slightly above 30mA. It's relatively close but if you need to strictly limit the current to no more than 30mA, you might want to consider using a slightly higher resistance value. For exact 30mA, the resistor should be 33.3kΩ.

Please note that this is an approximate value and actual results may vary due to other factors such as the tolerance of the resistor and the power supply voltage.

ril3y

what would a 32k value give me./

copilot

If we use a 32kΩ resistor for R3, we substitute it into the formula:

I_{SET} = 1000V / R_{PROG}

I_{SET} = 1000V / 32kΩ = 31.25mA

So, the charging current provided to the battery when using a 32kΩ resistor for R3 is approximately 31.25mA.

ril3y

can you suggest a value that will be below 30ma and is a standard value?

copilot

Sure, to achieve a charging current below 30mA with a standard resistor value, we need to increase the resistance. The closest standard 1% resistor value above 33.3kΩ is 33.6kΩ.

Let's calculate the charging current for this value:

I_{SET} = 1000V / 33.6kΩ = 29.76mA

So, using a 33.6kΩ resistor for R3 will result in a charging current of approximately 29.76mA, which is below 30mA.

Please note that this is an approximate value and actual results may vary due to other factors such as the tolerance of the resistor and the power supply voltage.

ril3y

give me a different common value

copilot

Sure, another common standard resistor value that is higher than 33.3kΩ is 34kΩ.

Using this value for R3, we can calculate the charging current as follows:

I_{SET} = 1000V / R_{PROG}

Substituting R_{PROG} with 34kΩ gives:

I_{SET} = 1000V / 34kΩ = 29.41mA

So, using a 34kΩ resistor for R3 would result in a charging current of approximately 29.41mA, which is below 30mA.

Again, please note that this is an approximate value and actual results may vary due to other factors such as the tolerance of the resistor and the power supply voltage.

I have 3v3 available to charge this battery. Can i use 3v3 to charge this batter...

ril3y

@copilot I have 3v3 available to charge this battery. Can i use 3v3 to charge this battery on u2?

copilot

Yes, you can use a 3.3V supply to charge the battery using the MCP73831-2ACI/MC (U2) battery charger IC.

According to the MCP73831-2ACI/MC datasheet:

The input voltage range (VDD) is from 3.75V to 6.0V, but it can operate down to 2.0V after start-up.
The IC features a constant current/constant voltage linear charger for single cell Li-Ion and Li-Polymer batteries.

However, there are a few things to note:

The lower voltage may result in a slower charge rate. The charge current is set with an external resistor from PROG to Ground. You may need to adjust this resistor value to ensure the charge current is appropriate for your battery and input voltage.
You need to make sure your 3.3V supply can provide enough current for the charging process. Check the battery specifications and the MCP73831-2ACI/MC datasheet to determine the required current.

Remember to always refer to the datasheet and battery specifications when designing battery charging circuits.

RPROG

Line 1

I_{SET} = 1000V / 34kΩ = 29.41mA

Line 2

BAT max charge current 30ma

RESET

PPS

BT1

HOT_START

Capacitance

1.0u F

Resistance

1.5k Ω

Manufacturer Part Number

LMBR0530T1G

Reviews

Electrical Rule Checks

Missing Footprints

Reports parts that have no footprint.

Design Rule Checks

Overlapping Copper • 4

Des	Net	Des	Net
BT1:P1	Net (C2 - P2)	BT1:1-1	None
BT1:P1	Net (C2 - P2)	BT1:1-2	None
Trace 2598	Net (C2 - P2)	BT1:1-1	None
BT1:1-1	None	Trace b76f	Net (C2 - P2)

Invalid Layer

Reports nodes that are assigned to a layer that doesn't exist in the layout stackup.

Component Overrides • 18

	Designator	Ruleset
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀VALUE｀＊	Override rule for ＊｀VALUE｀＊
	＊｀VALUE｀＊	Override rule for ＊｀VALUE｀＊
	＊｀VALUE｀＊	Override rule for ＊｀VALUE｀＊
	＊｀VALUE｀＊	Override rule for ＊｀VALUE｀＊
	＊｀VALUE｀＊	Override rule for ＊｀VALUE｀＊
	＊｀VALUE｀＊	Override rule for ＊｀VALUE｀＊
	＊｀VALUE｀＊	Override rule for ＊｀VALUE｀＊
	＊｀VALUE｀＊	Override rule for ＊｀VALUE｀＊
	+	Override rule for +

Airwires • 5

	Designators	Net
	GND:GND, Via:Via	GND
	Trace 0448:Trace 0448, Trace 3349:Trace 3349	Net (5V)
	U2:VDD, Trace 5390:Trace 5390	Net (5V)
	Trace da36:Trace da36, Trace 002a:Trace 002a	Net (C2 - P2)
	Trace e5f8:Trace e5f8, Trace d44f:Trace d44f	Net (U2 - PROG)

Deprecated Rules

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Layers with Multiple Fills

Reports layers that have multiple copper fills of different nets. Make sure the Connected Layers rule value of nets with fills is valid.

Floating Copper • 1

	Name
	Trace 8d17

Protected Intrusions

Reports intrusions from objects of other nets into polygons or fills that have the Protected layout rule applied.

Manufacturing

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System Checks

Auto-Layout

Beta

Reports issues with Auto-Layout if Flux cannot route something or must ignore a configuration.

Passive Components

Resistor Power Rating

Beta

Checks that the power traveling across a given resistor is under its rating with 50% headroom.

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Pull Up/Pull Down Presence

Beta

Checks that IC pins that require pull up or pull down resistors have them.

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Capacitor Voltage Rating

Beta

Checks that capacitors have appropriate voltage ratings to prevent overheating and ensure reliable circuit operation.

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
15.1k
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