This project is a custom buck converter module that is designed to operate from a 5V 1A input and provide an adjustable output voltage ranging from 0V to 2.05V. The load for this converter comprises 106 LEDs which operate at 20mA each, leading to an overall load current requirement of 2.12A.

The primary component utilized in this design is the Texas Instruments "TPS563201DDCR" which is a 3A, synchronous step-down voltage regulator. It's designed to operate from an input voltage in the range 4.5V to 17V, and can generate an output voltage in the range from 0.76V to 7V as per its datasheet[1].

In addition to the main regulator, the design incorporates several other components including resistors, capacitors, a switch and an inductor. The capacitors are likely there for smoothing and filtration purposes, while the resistors may be involved in providing a feedback mechanism to regulate and maintain the desired output voltage.

The switch, identified as "SW1" is an ALPSALPINE model "RDC1022A05" which is a resistor in the design. The inductor, "L1", is from TDK with a specification of 2.2u, and likely forms part of the step-down converter circuit in conjunction with the TPS563201DDCR component.

The design also contains multiple nets or connections which interlink these components to form the complete converter circuit. The output voltage of this circuit can be adjusted to a preferred value as per the load requirements. This simple, compact, and high-efficiency voltage conversion design enables driving a significant number of LEDs from a compact power source, providing flexibility for a wide range of applications.

[1] Page 1

brief explanation

This project is about the design of a custom Buck Converter module using TPS563201DDCR from Texas Instruments. The input to the converter is planned to be from a 5V 1A source and it intends to supply an adjustable output between 0-2.05V. The load that this converter module is expected to drive is an array of 106 LEDs that operate at 20mA, this sums up to a 2.12A load.

The project includes different components including resistors (R1, R2, R3, R4, R5, R6, R7), capacitors (C1, C2, C3, C4, C5, C6), a switch (SW1), an inductor (L1), and of course the main component which is a Buck converter IC (U1).

The components are interconnected through different nets (with unique identifiers) that ensure the correct operation of the converter based on the data sheet recommendations for the TPS563201DDCR.

It should also be noted that a few components (R3, R6 and R7) appear to have the special 'DNP' (Do not Populate) mark. This means these components are included in the design but are planned to be unpopulated in the final PCB production.

what kind of buck converter is this?

This project is a custom adjustable buck converter circuit that uses the TPS563201DDCR from Texas Instruments.

The TPS563201 is a simple, easy-to-use, 3 A synchronous step-down converter in a small SOT-23 package. It supports an input voltage range of 4.5V to 17V, and an output voltage range of 0.76V to 7V. This specific implementation is designed to convert from a 5V 1A input to an adjustable 0-2.05V output.

The buck converter operates on the principle of inductor energy storage and uses a switch to periodically interrupt power supply to the load, resulting in a conversion from a higher voltage to a lower one. This specific design is intended to power 106 LEDs which operate at 20mA, with a total load of 2.12A[1]. Other key components in the project include various resistors and capacitors, and an inductor (L1).

The design also utilizes D-CAP2 Mode control which supports low ESR output capacitors, allowing for a fast transient response and low external component count[2].

[1] Page 1

[2] Page 12