LiPo Battery Charging Schematic

proj665

proj665

want a basic schematic to charge a 3.7v lipo battery using tp4056 as well as a regulator to keep it at 3.3v

flux

I’ll create a basic LiPo charger plus a regulated 3.3 V supply.
  • Add a TP4056 charging stage with USB power input and a LiPo connector.
  • Add a 3.3 V regulator stage sized for your load and dropout needs.
  • Connect battery to the regulator and expose 3.3 V output.
  • Run ERC/availability checks.
Click Start on the plan bar to execute.
Pick charge current
Select 3.3V regulator
Add power-path option
Choose USB connector
Battery protection question
U1
https://cdn2.flux.ai/flux-comment-files/files/commentFileId-c3dce852c301e04699f4...
j-creator-tech

j-creator-tech

Image

Image

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2y
1
give me a rough idea on how to accomplish this project
j-creator-tech

j-creator-tech

@copilot give me a rough idea on how to accomplish this project
2y

copilot

Sure! Let's break down the steps to design a buck-boost converter that meets your specifications:
1. Power Management IC Selection:
  • You’ve already selected the TPS63051YFFR, which is a suitable buck-boost converter that operates from a 2.5V to 5V input voltage and can deliver a 3.3V output.
2. Basic Schematic Layout:
  • Ensure the IC is correctly connected with required external components including input/output capacitors, inductor, and feedback resistors.
3. Essential Components:
  • Input Capacitor (C_IN): Often 10µF to stabilize input voltage.
  • Output Capacitor (C_OUT): Often 22µF to stabilize the output voltage.
  • Inductor (L): Value typically recommended by the datasheet, often in the range of 1µH to 4.7µH.
  • Feedback Resistors (R1, R2): To set the output voltage.
  • Bypass Capacitor (C_BYP): Optional for additional noise filtering.
4. Electrical Connections:
  • VIN, VOUT: Connect the input voltage source and output load.
  • EN: Enable pin might need a pull-up resistor to VIN or controlled by a GPIO pin.
  • PG: Power Good indicator, often an open-drain pin requiring a pull-up resistor.
Step-by-Step Guide 1. Place Components:
  • Place the TPS63051YFFR in the schematic.
  • Add capacitors (C_IN, C_OUT, C_BYP) and an inductor (L).
2. Connections:
  • Input Connections:
    • Connect C_IN:+ to VIN.
    • Connect C_IN:- to GND.
  • Output Connections:
    • Connect C_OUT:+ to VOUT.
    • Connect C_OUT:- to GND.
  • Inductor Connection:
    • Connect L:1 to SW.
    • Connect L:2 to VOUT.
  • Feedback Resistors:
    • Connect R1 between VOUT and FB.
    • Connect R2 between FB and GND.
  • Enable and Power Good:
    • Connect EN to VIN (or GPIO via a resistor if you want control).
    • Connect PG to VIN via a pull-up resistor.
3. Feedback Network:
  • Use the feedback network to set the output voltage. For 3.3V, the resistor divider network can be calculated using the formula: VOUT=VREF(1+R1R2)V_{OUT} = V_{REF} \left(1 + \frac{R1}{R2}\right) Where $ V_{REF} $ (reference voltage) is typically 0.5V for the TPS63051.
4. Verification:
  • Verify all connections against the datasheet recommendations.
  • Check thermal considerations and layout recommendations in the datasheet for PCB design.
Example Connections:
  • C_IN: 10µF capacitor (C1)
  • C_OUT: 22µF capacitor (C2)
  • L: 2.2µH inductor (L1)
  • R1, R2: Values calculated based on feedback network.
Specific Connections List:
  1. Connect C1 to TPS63051YFFR.
  2. Connect C1 to TPS63051YFFR.
  3. Connect C2 to TPS63051YFFR.
  4. Connect C2 to TPS63051YFFR.
  5. Connect L1 to TPS63051YFFR.
  6. Connect L1 to TPS63051YFFR.
  7. Connect one side of R1 to TPS63051YFFR.
  8. Connect the other side of R1 to TPS63051YFFR.
  9. Connect one side of R2 to TPS63051YFFR.
  10. Connect the other side of R2 to TPS63051YFFR.
Feel free to adjust the component values based on the precise requirements and the datasheet. Let me know if you need further details or help with specific parts of the design!
2y
2
VIN
C1
Capacitance
10uF

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    Buck Boost Converter 3.3v 500mA

    Buck Boost Converter 3.3v 500mA thumbnail
    A buck boost converter that can be powered from Li-Ion battery and output 3.3v @500mA. Powered by the TPS63051YFFR and in the same package as a standard Adafruit buck converter.
    Input Voltage Range: 2.5v to 5

    Properties

    Properties describe core aspects of the project.

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