红水杯

[Schrödinger’s Rabbit Paper] USB Small Lamp (RY3730 Verification Board)

Overview

I have the following three major purposes in drawing PCB:
1. [Cuteness is too big]: It means that the size of the PCB should be as small as possible
2. [Obsessive-compulsive disorder friendly]: Align and align! If not aligned, you will die!
3. [The Stubbornness of 0805]: I am blind and only solder devices above 0805 (hum).
The design goal is to make a small USB lamp.
It is driven by a DC-DC constant current scheme.
The boost IC is RY3730 from Ruiyuan Semiconductor. .The
link to Lichuang Mall is https://item.szlcsc.com/344519.html
, where R1 is the current feedback resistor. The calculation method is R=0.25V/Iled. For
PCB project files, see the attached

circuit diagram preview,

PCB wiring,

PCB front and back 3D preview The actual power consumption
of the final product can be optimized: 1. One input and output capacitor is enough 2. The freewheeling diode can be S4 packaged in SOD-323, which is enough

Design Files

All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.

It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

Hot

Technical Resources More

Search Datasheet?

Supported by EEWorld Datasheet

Technical Videos More

Forum More

Update:2024-11-15 07:39:23

The Low Noise Ripple Probe Guide tells you how important probes are to your testing!
The Low Noise Ripple Probe Guide tells you how important probes are to your testing! Most electronic designs today require different supply voltages to operate correctly. In fact, many components with
T6963C negative display problem
I'm working on T6963C recently, and I don't quite understand the manual regarding negative display under text features. Can someone give me some advice? Thank you!
【Goodbye 2021, Hello 2022】2021, I became a moderator
2021 should be considered a very ordinary year. The work is the same as before, from product scheme design, overall design, detailed design to after-sales maintenance, etc., which is repetitive but fu
【ST NUCLEO-G071RB Review】+ My review process
[i=s]This post was last edited by hujj on 2019-1-9 10:45[/i] The ST NUCLEO-G071RB[/color][/align] development board used in this review comes from the [color=#008000][backcolor=transparent][font=Tahom
Share a learning material: Comic electronic circuit
This material explains electronic circuits in the form of comics. It is a very practical book. Compared with our traditional textbooks, it has several outstanding features. First, the comic format is
Are there any domestic manufacturers that are doing well in the wireless/RF field?
I am doing a survey in this area recently and would like to ask everyone, which manufacturers in our country are doing well in the wireless/RF field? Do you have any recommendations? Or what domestic

Datasheet More

Circuits More