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@copilot, perform a BoM consolidation review to identify passive components (res...
collinsemasi

collinsemasi

@copilot @copilot, perform a BoM consolidation review to identify passive components (resistors, capacitors, and inductors) that have similar values (within ±50%) and the same package code. The goal is to simplify the BoM and reduce costs by replacing these components with a single value where possible, without affecting the circuit's functionality.
For each group of similar components, compare their electrical and mechanical characteristics, then identify a single value that can replace the others. Provide a detailed comparison table for each group, listing the designators, component values, package codes, and the proposed consolidated value, along with key specifications and any additional notes. Document the final proposed consolidated BoM in a table format.
1y

copilot

To perform a BoM consolidation review, we need to:
  1. Identify passive components with similar values and the same package code.
  2. Compare their electrical and mechanical characteristics.
  3. Propose a single value that can replace others within ±50% tolerance if applicable.
Let's break down the BoM and identify resistors, capacitors, and inductors that can potentially be consolidated.
Resistors Analysis
  1. Resistance Values and Package:
    • R1: 3kΩ, SMD_0603
    • R4: 4.7kΩ, SMD_0603
    • R5: 6.8kΩ, SMD_0603
    • R8: 2kΩ, SMD_0603
    • R9: 20kΩ, SMD_0603
    • R6: 150kΩ, SMD_0603
    • R7: 15kΩ, SMD_0603
    • R3: 68kΩ, SMD_0603
  2. Grouping by Similar Values:
    • Group 1: R1, R4, R5
      • Range: 3kΩ to 6.8kΩ
    • Group 2: R7, R9
      • Range: 15kΩ to 20kΩ
Capacitors Analysis
  1. Capacitance Values and Package:
    • C1, C2, C5: 10µF, C_0603
    • C3, C6, C9: 100nF, C_0603
    • C4: 4.7µF, C_0603
    • C7, C10: 22µF, C_0603
    • C8: 68pF, C_0603
  2. Grouping by Similar Values:
    • Group 1: C4 and 4.7µF capacitors: None immediately within 50% range.
    • Group 2 is applicable to 10µF capacitors already.
Inductor Analysis
  1. Inductance Values and Package:
    • L1: 10µH, SWPA4030S
    • L2: 2.2µH, SWPA3015S
The inductor values are too distinct from each other for consolidation within a 50% range.
Consolidation Proposals

Resistor Group 1

DesignatorOriginal ValuePackageProposed Consolidated ValueNotes
R13kΩ06034.7kΩMinimal impact
R44.7kΩ06034.7kΩCurrent value
R56.8kΩ06034.7kΩSlightly higher

Resistor Group 2

DesignatorOriginal ValuePackageProposed Consolidated ValueNotes
R715kΩ060318kΩIncrease value
R920kΩ060318kΩDecrease value
Capacitors
For all capacitors, due to applications in filter and smoothing roles, each value is critical and thus left unchanged.
Final Proposed Consolidated BoM
Here are the proposed changes:

Table

DesignatorOriginal ValuePackageProposed Consolidated ValueNew Part Number (if different)
R1, R4, R53kΩ, 4.7kΩ, 6.8kΩ06034.7kΩUnchanged
R7, R915kΩ, 20kΩ060318kΩUnchanged
Continue to monitor circuit performance to ensure any tolerances or parameter changes remain within acceptable ranges for expected conditions.
1y
What is the maximum charging current for U4 as specified in the datasheet?
collinsemasi

collinsemasi

@copilot What is the maximum charging current of U2 as specified in the datasheet
1y

copilot

It seems there was no mention of U2 in either the project components list or the datasheet excerpts provided. If you could clarify the specific part number or details about U2, I could offer further assistance or make some educated assumptions based on common components.
1y
collinsemasi

collinsemasi

@copilot What is the maximum charging current of U4 as specified in the datasheet
1y

copilot

The provided datasheet excerpts did not explicitly state the maximum charging current for U4 (CN3063). However, the excerpts mention that the charge current is set by the resistor connected to the ISET pin. In precharge mode, the ISET pin's voltage is regulated to 0.2V, while in constant charge current mode, it is regulated to 2V. The charge current can be calculated using the formula $I_{CH} = \frac{V_{ISET}}{R_{ISET}} \times 900$.
To find the maximum charging current, you would need to know the value of the resistor connected to the ISET pin. If you have that information, you can calculate the maximum current with the formula given.
1y
collinsemasi

collinsemasi

@copilot What is the maximum charging current for U4 as specified in the datasheet?
1y

copilot

The maximum charging current for the CN3063 (U4) is determined by the resistor connected to the ISET pin. The charge current, $I_{\text{CH}}$, can be calculated using the formula:
ICH=(VISETRISET)×900I_{\text{CH}} = \left( \frac{V_{\text{ISET}}}{R_{\text{ISET}}} \right) \times 900
In constant charge current mode, $V_{\text{ISET}}$ is regulated to 2V. The specific maximum charging current would depend on the resistance value of the resistor used with the ISET pin (R8 in your project).
1y
2
Go through the datasheet of U1 and recommended soft-start capacitor values that ...
collinsemasi

collinsemasi

@copilot Go through the datasheet of U1 and recommended soft-start capacitor values that will ensure proper startup behavior? Present the results in a well detailed table format
1y

copilot

The datasheet excerpts provided do not include specific information about the recommended soft-start capacitor values for the RT8059GJ5. Generally, the soft-start capacitor is used to gradually ramp up the output voltage to prevent inrush current and ensure smooth startup.
To determine the appropriate soft-start capacitor value, typically, the datasheet would specify a formula or offer a table that correlates capacitor values with different soft-start times. In the absence of specific data, here’s a general format for presenting such information:

Table

Soft-Start CapacitorSoft-Start Time (Typical)
1 nF0.5 ms
10 nF5 ms
100 nF50 ms
1 µF500 ms
Recommendations:
  • Start with Standard Values: Choose a standard capacitor value like $10 , \text{nF}$ to test the soft-start behavior in your circuit.
  • Adjust Based on Performance: If the startup is too fast or too slow, adjust the capacitor value accordingly.
  • Test Under Load: Ensure that the soft-start capacitor provides smooth startup across various load conditions.
For specific information, please consult the full datasheet of the RT8059GJ5 from the manufacturer's website or documentation. If you have access to further documentation or need help with testing, let me know!
1y
5
, perform a BoM consolidation review to identify passive components (resistors, ...
collinsemasi

collinsemasi

Table

DesignatorsCurrent MPNValuePackageProposed MPNProposed Value
R8, R70603WAF2002T5E, AC0603FR-0715KL20kΩ, 15kΩSMD_0603_1608MetricR8 MPN Replaced17.5kΩ
No ChangeGRM188R61A106KE69D10µFC_0603_1608Metric--
No ChangeGRM188R71H104KA93D100nFC_0603_1608Metric--
No ChangeGRM188R60J226MEA0D (multiple instances)22µFC_0603_1608Metric--
No ChangeGCM1885C2A680JA16D68pFC_0603_1608Metric--
R6, R3, R5, R4, R10603WAF1503T5E, RC0603FR-0768KL, 0603WAF6801T5E, 0603WAF4701T5E, 0603WAF3001T5EVariousVarious--
No ChangeSWPA4030S100MT10µHL_Sunlord_SWPA4030S--
No ChangeSWPA3015S2R2MT2.2µHL_Sunlord_SWPA3015S--
1y
collinsemasi

collinsemasi

@copilot, perform a BoM consolidation review to identify passive components (resistors, capacitors, and inductors) that have similar values (within ±50%) and the same package code but currently use different MPNs. The goal is to simplify the BoM and reduce costs by replacing these components with a single MPN where possible, without affecting the circuit's functionality.
For each group of similar components, compare their electrical and mechanical characteristics, then identify a single MPN that can replace the others. Provide a detailed comparison table for each group, listing the designators, current MPNs, component values, package codes, and the proposed consolidated MPN, along with key specifications and any additional notes. Document the final proposed consolidated BoM in a markdown table format.
1y

copilot

Let's go through the project and analyze the passive components, focusing on resistors, capacitors, and inductors that have the same package and similar values (within ±50%).
Capacitors:
  1. GRM188R61A106KE69D
    • Capacitance: 10µF
    • Package: C_0603_1608Metric
  2. GRM188R71H104KA93D
    • Capacitance: 100nF
    • Package: C_0603_1608Metric
  3. GRM188R60J226MEA0D
    • Capacitance: 22µF
    • Package: C_0603_1608Metric
  4. GCM1885C2A680JA16D
    • Capacitance: 68pF
    • Package: C_0603_1608Metric
Resistors:
  1. 0603WAF2002T5E
    • Resistance: 20kΩ
    • Package: SMD_0603_1608Metric
  2. AC0603FR-072KL
    • Resistance: 2kΩ
    • Package: SMD_0603_1608Metric
  3. AC0603FR-0715KL
    • Resistance: 15kΩ
    • Package: SMD_0603_1608Metric
  4. 0603WAF1503T5E
    • Resistance: 150kΩ
    • Package: SMD_0603_1608Metric
  5. 0603WAF3001T5E
    • Resistance: 3kΩ
    • Package: SMD_0603_1608Metric
  6. 0603WAF4701T5E
    • Resistance: 4.7kΩ
    • Package: SMD_0603_1608Metric
  7. RC0603FR-0768KL
    • Resistance: 68kΩ
    • Package: SMD_0603_1608Metric
  8. 0603WAF6801T5E
    • Resistance: 6.8kΩ
    • Package: SMD_0603_1608Metric
Inductors:
  1. SWPA4030S100MT
    • Inductance: 10µH
    • Package: L_Sunlord_SWPA4030S
  2. SWPA3015S2R2MT
    • Inductance: 2.2µH
    • Package: L_Sunlord_SWPA3015S
Step 1: Identify Similar Components
Based on the values, we will now group similar components and see if any can be consolidated:
Capacitors:
  • GRM188R61A106KE69D (10µF) and GRM188R60J226MEA0D (22µF) are different. The capacitance is significantly different and would affect the functionality if consolidated.
  • GRM188R71H104KA93D (100nF) is an order of magnitude different from others in its package. No consolidation possible.
  • GCM1885C2A680JA16D (68pF) is distinct and cannot be consolidated with others.
Conclusion: No consolidation for capacitors due to distinctly different capacitance values affecting the circuit.
Resistors:
  • Potential Group:
    • 0603WAF2002T5E: 20kΩ
    • AC0603FR-0715KL: 15kΩ
    • RC0603FR-0768KL: 68kΩ
    • 0603WAF1503T5E: 150kΩ
Let's calculate ratios:
  • 15k / 20k = 0.75 (within ±50%)
  • 68k is outside the range for consolidation with 20kΩ and 15kΩ.
  • 150k is outside the range for consolidation with others.
Conclusion: Only 15kΩ and 20kΩ can potentially be consolidated with a resistor of value approximately 17.5kΩ (if acceptable by circuit design criteria).
Inductors:
  • Values (10µH and 2.2µH) are significantly different; no consolidation possible.
Step 2: Propose Consolidation
Given that only the resistors for 15kΩ and 20kΩ are candidates for consolidation, I will propose a new value of 17.5kΩ if the design permits.
Proposed Consolidated BoM 
Markdown
| Designators | Current MPN                          | Value     | Package            | Proposed MPN      | Proposed Value |
|-------------|--------------------------------------|-----------|--------------------|-------------------|----------------|
| **R8, R7**  | 0603WAF2002T5E, AC0603FR-0715KL     | 20kΩ, 15kΩ| SMD_0603_1608Metric| R8 MPN Replaced   | 17.5kΩ         |
| **No Change**   | GRM188R61A106KE69D                     | 10µF      | C_0603_1608Metric  | -                 | -              |
| **No Change**   | GRM188R71H104KA93D                     | 100nF     | C_0603_1608Metric  | -                 | -              |
| **No Change**   | GRM188R60J226MEA0D (multiple instances)| 22µF      | C_0603_1608Metric  | -                 | -              |
| **No Change**   | GCM1885C2A680JA16D                     | 68pF      | C_0603_1608Metric  | -                 | -              |
| **R6, R3, R5, R4, R1**   | 0603WAF1503T5E, RC0603FR-0768KL, 0603WAF6801T5E, 0603WAF4701T5E, 0603WAF3001T5E | Various | Various         | -                 | -              |
| **No Change**   | SWPA4030S100MT                        | 10µH      | L_Sunlord_SWPA4030S| -                 | -              |
| **No Change**   | SWPA3015S2R2MT                        | 2.2µH     | L_Sunlord_SWPA3015S| -                 | -              |
Note: The aforementioned consolidation proposal for resistors R7 and R8 should be reviewed with the circuit's functional requirements in mind. Ensure such changes do not alter the intended behavior of the circuit.
1y
7
use the datasheets of LED D5 and D2 to obtain electrical characteristics needed ...
collinsemasi

collinsemasi

@copilot use the datasheets of LED D5 and D2 to obtain electrical characteristics needed to calculate the appropriate current-limiting resistor value. Then use python to calculate the value and present it in a well detailed table format
1y

copilot

For LED D5, the forward voltage is typically 2.0V, and it operates at a forward current of 20mA. Unfortunately, I don't have a datasheet excerpt for LED D2, but it has similar characteristics: a forward voltage of 2.0V and a forward current of 20mA, as indicated in the project description.
Assumptions:
  • Both LEDs have a forward voltage ($V_f$) of 2.0V.
  • Both LEDs operate at a forward current ($I_f$) of 20mA.
  • You are supplying the LEDs from a 5V power source.
Resistor Calculation:
The formula for calculating the current-limiting resistor ($R$) is:
R=Vsource−VfIfR = \frac{V_{\text{source}} - V_f}{I_f}
Where:
  • $V_{\text{source}}$ = Supply voltage (5V)
  • $V_f$ = Forward voltage of the LED (2.0V)
  • $I_f$ = Forward current of the LED (20mA)
Let's calculate the resistor values using Python.
Code Interpreter 
Python
# Define the known values
V_source = 5.0  # Supply voltage in volts
V_f = 2.0       # Forward voltage in volts
I_f = 20e-3     # Forward current in amperes (20mA)

# Calculate the resistor value
R = (V_source - V_f) / I_f

R
The calculated value for the current-limiting resistor is 150 ohms.
Here's a table summarizing the electrical characteristics and the calculated resistor value:

Table

ParameterValue
Forward Voltage ($V_f$)2.0 V
Forward Current ($I_f$)20 mA
Supply Voltage ($V_{\text{source}}$)5.0 V
Calculated Resistor ($R$)150 ohms
This table shows that you will need a 150-ohm resistor to limit the current for both LEDs when powered from a 5V supply.
1y
1
List all components specified in the datasheet of U1 for building the typical ap...
collinsemasi

collinsemasi

@copilot List all components specified in the datasheet of U1 for building the typical application circuit. Present the information in a detailed table format with equations needed to size the componets
1y

copilot

For the RT8059GJ5, the datasheet specifies the components needed for the typical application circuit as follows:

Table

ComponentValueDescriptionEquation
L2.2µHInductor for controlling output ripple and stability.ΔIL=VOUT×(1−VOUT/VIN)f×L\Delta I_L = \frac{V_{OUT} \times (1 - V_{OUT}/V_{IN})}{f \times L}
C_IN4.7µFInput capacitor for stabilizing input voltage.N/A
C_OUT10µFOutput capacitor for reducing voltage ripple.N/A
R1N/AFeedback resistor for setting output voltage, typically between 60.2kΩ to 300kΩ.VOUT=VREF×(1+R1R2)V_{OUT} = V_{REF} \times (1 + \frac{R1}{R2})
R2N/AFeedback resistor for setting output voltage, typically between 60.2kΩ to 300kΩ.VOUT=VREF×(1+R1R2)V_{OUT} = V_{REF} \times (1 + \frac{R1}{R2})
C1N/ACompensation capacitor; choose such that R1×C1R1 \times C1 is in the range of 3×10−63\times10^{-6} to 6×10−66\times10^{-6}.N/A
Notes:
  • The inductor value is chosen based on your application needs, with larger values reducing ripple current. The operating frequency affects choice; a typical switching frequency for a device like this might be around 1MHz.
  • R1 and R2 form a voltage divider that feeds back the output voltage to the feedback pin. The reference voltage is typically 0.6V.
  • The capacitors help to stabilize the circuit by reducing noise and ripple on both the input and output sides.
If you have any further questions on how to select these components or place them in your circuit, feel free to ask!
1y
3
Identify all ICs in the project that require a soft-start function. For each IC,...
collinsemasi

collinsemasi

@copilot Identify all ICs in the project that require a soft-start function. For each IC, review the datasheet and recommend appropriate soft-start capacitor values to ensure proper startup behavior. Present the results in a detailed table format with the following columns: IC Designator, IC Description, Recommended Soft-Start Capacitor Value, Justification/Notes
1y

copilot

The provided project contains several ICs, but let's focus on identifying which of them have a soft-start function mentioned in their datasheets and then recommend appropriate soft-start capacitor values. Here are the ICs and their key descriptions for your board:
  1. IC: SY6280A AC
    • Description: Boost IC
    • Soft-Start Feature: Not explicitly mentioned in the provided excerpts.
  2. IC: MT3608L
    • Description: Step-up converter
    • Soft-Start Feature: The MT3608L has an internal soft start to limit input current at startup and reduce overshoot.
  3. IC: RT8059GJ5
    • Description: Buck converter
    • Soft-Start Feature: Included in the features but no explicit capacitor mentioned in the provided excerpts.
  4. IC: CN3063
    • Description: Solar-powered charger
    • Soft-Start Feature: Not explicitly mentioned.
Based on the information we have, the key ICs are the MT3608L and RT8059GJ5, both of which mention the soft-start feature in their datasheets. However, specific capacitor values may not be detailed in the available excerpts, so I will make recommendations based on typical values for similar converters.

Table

IC DesignatorIC DescriptionRecommended Soft-Start Capacitor ValueJustification/Notes
IC1MT3608LInternal (No external capacitor needed)The MT3608L's internal soft start limits input current and overshoot. No external capacitor required.
U1RT8059GJ5Determined by external RC circuitNo specific value provided in excerpts. Typical soft-start caps range from 10nF to 100nF.
U3SY6280A ACNot ApplicableSoft start feature not mentioned in the provided datasheet excerpts.
U4CN3063Not ApplicableSoft start feature not mentioned in the provided datasheet excerpts.
For the RT8059GJ5, if the soft-start delay is critical, consult the full datasheet or manufacturer recommendations for more accurate values tailored to your application.
1y
6
J3
C1
Capacitance
10u F
R9
Resistance
20k Ω
R8
Resistance
2k Ω
U3
R7
Resistance
15k Ω
R6
Resistance
150k Ω
U1
C4
Capacitance
4u7 F
R1
Resistance
3k Ω
IC1
C2
Capacitance
10u F
U4
C3
Capacitance
100n F
L1
Inductance
10u H
SETTING OUTPUT VOLTAGE
Line 1
------------------------------------------------------------
Line 2
The internal reference VREF is typically 0.6V. The output voltage is divided by a resistor divider,R1 and R2 to the FB pin.
Line 3
Vout = Vref x (1 + R6/R9)
Line 4
------------------------- AND ---------------------------
Line 5
Vout = Vref x (1 + R6/(R1+R4))
D1
R2
Resistance
Resistance
C8
Capacitance
68p F
VSOLAR
VUSB
VBAT
+3V3
D4
R4
Resistance
4k7 Ω
VBAT
C10
Capacitance
22u F
C9
Capacitance
100n F
+3V3
R3
Resistance
68k Ω
C7
Capacitance
22u F
VBAT
VSOLAR
D3
IC2
R5
Resistance
6k8 Ω
VUSB
L2
Inductance
2u2 H
C6
Capacitance
100n F
C5
Capacitance
10u F
12_5V
J1
D5
Color
Red
SW1
D2
Color
Green
J4
J2
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    875105359001
    10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
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    1.2M
  • CTL1206FYW1T
    CTL1206FYW1T
    Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
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Inspect

Current Limiting Resistors: BRAVE POWER MANAGEMENT BOARD

Current Limiting Resistors: BRAVE POWER MANAGEMENT BOARD
Description

Created
Last updated by collinsemasi
1 Contributor(s)
collinsemasi

Controls

Properties

Availability & Pricing

DistributorQty 1
Arrow$0.87–$2.42
Digi-Key$0.72–$2.81
LCSC$1.70–$3.43
Mouser$2.90–$3.53
Verical$0.51–$1.91

Assets