Power interface

lym1210

Power interface [Copy link]

 

Hello everyone, I want to connect an external 20V DC power supply to power my board. What kind of interface should I use on my board to connect the external 20V power supply? Can I use DB15?

maychang

If the current is not large (no more than a few hundred mA), it can be used. However, it is a bit wasteful unless the extra pins of DB15 are used for other purposes.

lym1210

If the current is a few amperes, what should I use?

lym1210

If the current is a few amperes, what should I use?

qwqwqw2088

lym1210 posted on 2018-9-10 10:24 If the current is a few amperes, what is the best one to use?

3A is also a few amperes, 5A is also a few amperes, but the difference in choosing connectors is still very large. Do you plug and unplug frequently? What is the maximum load? Are there other requirements, such as the shell, the protection level IP, or is it just a general connection? Do you need terminal connection, round connector, power connector, aviation plug, etc.?

PowerAnts

For a current of 35A, you need at least VH3.96.

lym1210

qwqwqw2088 posted on 2018-9-10 10:53 3A is also a few amps, 5A is also a few amps, but the difference is still very large when choosing connectors. Do you plug and unplug frequently? What is the maximum load? And other...

The DC power supply is the input of the voltage stabilization circuit. The voltage stabilization needs to output multiple voltages, among which the maximum current requirement is 1.5A, so I would like to ask what kind of power supply interface is better

Arvinˇ

Just go to DIGIKEY and filter according to your requirements.

qwqwqw2088

The current is not large, so leave enough margin when selecting the connector. The connection terminals of HX2.54 and KF2510 are 2.54mm in pitch. CH3.96 and VH3.96 are both OK. You need to determine the pin spacing according to your own needs. Find the plug-in PCB terminal blocks with male and female pairs.

lym1210

qwqwqw2088 posted on 2018-9-10 15:12 The current is not large, so leave enough margin when choosing the connector. The connection terminals of HX2.54 and KF2510 have a 2.54mm spacing. CH3.96 and VH3.96 are both fine. It depends on...

Hello senior, I checked and found that there are many series of VH3.96. I am not familiar with this connector and I have not found any information about it. I don't know the difference between VHR-2N/3N/4N, etc., and whether the B2P/3P/4P series and VHR are a pair of connectors. I don't know which pin of these connectors is connected to the ground and which is connected to the positive pole of the power supply, and I have not found any information about them.

qwqwqw2088

lym1210 posted on 2018-9-10 20:16 Hello senior, I checked and found that VH3.96 has many series. I am not familiar with this connector and I have not found any information about it. I don’t know VHR-2N/3N/4N, etc...

These connectors are also used in circuit boards. Not all boards use these. They are determined according to the functions implemented by their own boards. Generally, large suppliers will provide specifications for these connectors. Most of them are found on the Internet. VHR-2N;VHR-3N;VHR-4N;VHR-5N;VHR-6N; Chinese specifications,

PowerAnts

I would go to digikey and JLC websites to look around. In the past, I would go to the SEG counter to buy a bunch of terminals. When I needed them, I would take a photo and send them to them via QQ, saying: I sent a package over, but I didn't know what it was called. I was really stupid when I thought about it. I didn't pay attention to such things in the past.

qwqwqw2088

"Which pin of these connectors is connected to the ground and which is connected to the positive pole of the power supply?" If the product has standard requirements, follow the standards. If not, define it yourself, or define it according to the external plug-in. The circuit board should be clearly marked. It is best to choose anti-reverse plug-in connectors. The standard connectors have standard spacing. The PCB board should be determined according to the standard connector drawing. You still need to be familiar with your own products. It is not that difficult. Disassemble some circuit boards around you and watch electronic products.

led2015

Choose the interface according to the official website information, and refer to others in the actual examples.