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just give me a rough idea to accomplish this project
amlanc2005

amlanc2005

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

copilot

To accomplish your buck-boost converter project with a 3.3V, 500mA output specification using the TPS63051YFFR, you'll follow a schematic structure that involves connecting input power, managing output, and including the necessary passive components for stabilization and feedback. Let's outline the high-level steps and connections required based on the components you've listed:
1. Input Power Supply Connection
  • VIN and GND: Connect your Li-ion battery to Vin and GND. Ensure your Li-ion battery supplies a voltage in the range of 2.5V to 5.5V to match the input requirements of the TPS63051YFFR. Use the J1 connector for easy connection to the battery, with J1:PIN_2 for VIN connected to IC1:VIN (Pin 2 of TPS63051YFFR) and J1:PIN_4 for GND connected to IC1:GND (Pin 4).
    • Connect Vin:(P1) to J1:PIN_2, IC1:VIN.
    • Connect GND to J1:PIN_4, IC1:GND.
2. Output Configuration
  • 3.3V Output: The output is configured by connecting IC1:VOUT (Pin 9) to your output capacitors C1 and C4, and then to the 3V3 power net and load (J1:PIN_3). The feedback net (IC1:FB, Pin 8) senses the output voltage to regulate it to 3.3V.
    • Connect IC1:VOUT to C1:P2, C4:P2, and 3V3:P1.
    • Connect J1:PIN_3 to 3V3:P1 for load connection.
3. Inductor Connections
The inductor L1 is critical for energy storage in both buck and boost modes of the converter:
  • Connect IC1:L1 to L1:P1 and IC1:L2 to L1:P2.
4. Feedback and Control
  • FB for Feedback: Set the feedback network to ensure proper output voltage regulation. Typically, this involves a voltage divider from the output to IC1:FB. However, specifics like resistances aren't detailed here.
  • Soft-Start: Connect C3:P1 to IC1:SS for soft-start configuration, controlling the startup time.
  • Enable Pin: Use J1:PIN_1 connected to IC1:EN to enable the converter, typically tied to a logic level high for automatic startup.
  • Current Limits and Mode Selection: The ILIM0 and ILIM1 pins (IC1:ILIM0, IC1:ILIM1) define the current limit and possibly the operational mode. Without specific requirements, they often are grounded or set to certain logic levels according to your current needs. The PFM/PWM pin (IC1:PFM/PWM) can also be used to select the switching mode based on your efficiency/noise requirements.
5. Filtering and Decoupling Capacitors
To ensure smooth operation and minimize input and output voltage ripple, decoupling and filtering capacitors are crucial:
  • Place C2 close to IC1:VIN and IC1:GND to filter the input side.
  • C1 and C4 at the output help stabilize the output voltage and reduce ripple. Ensure these are placed as close to IC1:VOUT and ground as possible.
  • C3 serves the soft-start function and should be connected close to IC1:SS.
6. Power Good and Under-Voltage Lockout (Optional)
  • You might also want to use IC1:PG for power-good indication, which could interface with MCU or LED indicators for system status feedback.
Connection Summary:
  • Input: Connect J1:PIN_2 to IC1:VIN and J1:PIN_4 to IC1:GND.
  • Output: Connect IC1:VOUT to C1:P2, C4:P2, and 3V3:P1. Connect J1:PIN_3 to your load (Assuming it's the output).
  • Inductor: Connect IC1:L1 to L1:P1 and IC1:L2 to L1:P2.
  • Feedback & Control: Connect control signals and configure feedback network appropriately.
  • Filtering: Place C2 for input filtering and C1, C4 for output stabilization.
This is a rough idea based on the typical use of the TPS63051YFFR and the components you've listed. You might need to adjust resistor values for the feedback network to set the output voltage precisely and ensure other connections satisfy the device's layout guidelines for optimal performance.
2y
2
C1
Capacitance
10uF
C4
Capacitance
10uF
C3
Capacitance
1nF
C2
Capacitance
10uF
3V3
L1
Inductance
1.5uH
IC1
Vin
J1
R1
Resistance
10kΩ

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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 the output 3.3V @ 500mA. Powered by the TPS63051YFFR and in the same package as a standard Adarfruit buck converter.
input Voltage Range: 2.5V to 5.5V

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Qty 1

Digi-Key

$1.58

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$3.66

Mouser

$2.89

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