tags: Power supply design hardware
Externally supplied 7~36V power supply with onboard DC-DC
The power chip is converted to a 5V power supply, and the power chip used in the development board is LM2596S-5.0.
The chip can output up to 3A current
The 3.3V power supply uses the LD1117-3.3 (TO-252-2 package for easy cooling). The chip is converted from a 5V power supply.

Circuit function: Realize the bidirectional conversion of 3.3V and 5V level in the I2C bidirectional bus system, and do not need direction selection signal, and can also isolate the power-down bus par...
1. 3V/5V DC signal detection For ordinary signal disconnect detection, a commonly used triode is used to make a level conversion. Then you can judge the signal within a certain range, as shown in the ...
Question: My input is 24v, the output is 5V, there are two options, Solution 1: Use LM7805 to directly convert from 24V to 5V If the load current behind is 100ma Then the heating power on the LM7805 i...
1. Design purpose: Currently, most microprocessor chips on the market are powered by 5V/3.3V, and the internal drive circuits of some products are generally powered by 5V/3.3V. However, the external i...
Written in front: The serial communication may fail due to the different levels of the two microcontrollers. At this time, it needs to be solved by a level conversion circuit. This article gives two m...
When we use STM32 or other 3.3v chip internal ADC peripherals, we often encounter the input analog range too large (for example, the input is positive a...
Problem background When designing a MCU or ARM system circuit, the VCC that often meets the MCU is 3.3V, but the peripheral circuit needs 5V, sometimes it is over. Although the MCU's IO claims to supp...
The highest voltage sampled by AD cannot exceed the supply voltage VCC,In common development boards and circuits, the system power supply voltage does not exceed 5V, and the sampling range of most AD ...
Usually PCB circuit may need to involve a switching power supply control portion, may be used at this time the tube P-MOS to control the NPN transistor, wherein the P-MOS tube classic model AO3401, ot...
5V to 3.3V common solution ## 1.AMS117 Advantages: cheap, 1 cent Disadvantages: large size Circuit diagram (from punctual atom): 2. HT7833 Advantages: the volume is one size smaller than AMS1117 Disad...