Based on Texas Instruments TPSM41625 high power development board

1. Maximum 25A high current output

2. Output 0.5-7V continuously adjustable

3. Access ADC digital adjustment

4. Access PWM digital adjustment

5. Input 4-16V

6. Maximum power 175W

7. Ultra-small size 16mmx12mm

The picture above shows Xiaoqing, a programmer in the laboratory. Here are a few more photos. Bilibili video link: https://www.bilibili.com/video/BV12L4y1K7fk/

If you like my project, please like and collect it. It is also the motivation for school girls to write code! Thanks! More quality works will be released in the next issue

Bilibili UP owner: Lei Laoba talks about electronics, QQ Q&A group 458720579 

Overall design plan block diagram

This project introduces an adjustable power supply based on a power chip from Texas Instruments. Since the current can reach 25A and the size is very small, it is widely used in aerospace and basic wireless communication facilities.

The following will introduce the design principles and ideas of the development board.

Schematic design instructions

The picture above is the general circuit diagram, which is divided into main power module, op amp adjustment voltage module, and positive and negative power modules.

The positive and negative power modules in the picture above are responsible for providing positive and negative power supplies for the development board, which are two Texas Instruments BUCK-DC_DC step-down chips.

The op amp chip in the picture above is responsible for voltage regulation, which facilitates us to connect PWM control voltage, or use DA to output control voltage, or use a potentiometer.

PCB design instructions

Physical display instructions

Precautions

Since the power chip is relatively expensive and the output current is large, please check it before turning on the power. Remember not to operate it while the power is on.

Demo video