Under DC 12 v above DC80V 50 a current protection, with the recovery feature expression may not clear the specific WeChat 2822078775

CodePudding user response:

The simplest is to use voltage regulator tube voltage detection, also can join https://blog.csdn.net/xianfajushi/article/details/101193287
Flow had better be self-locking, since the restore to shrimp conditions, if the flow from the recovery or over current when the power is that it's not appropriate,

CodePudding user response:

Over current protection can join http://bbs.elecfans.com/jishu_1885452_1_1.html

CodePudding user response:

Letter has been read, said the conditions of some proposals of you:
In terms of power voltage beyond, I will give the voltage alarm circuit modification parameters can be realized, but you the voltage range is wide enough.
In terms of current, power is easy, the condition is need to develop an automatic restore power, there are several overcurrent happen, such as the starting current, overload overcurrent, damage over current, over current detection after shut down the power supply is normal, the first two kinds of circumstances can be automatically restored, and the damage flow is not automatically restored, then, how to determine three.? This is to understand the conditions to take action.

CodePudding user response:

refer to the second floor the wise know already should good karma response:

the simplest is to use voltage regulator tube voltage detection, also can join https://blog.csdn.net/xianfajushi/article/details/101193287
Flow had better be self-locking, since the restore to shrimp conditions, if the flow from the recovery or over current when the power is that it's not appropriate,

Also don't have to be self-locking, "hiccups" also is the protection standards, has used a lot of adapter hiccups, the method of design is difficult, but you need to consider the response speed and "burp" after the actual output power level in the circuit safety input range, some integrated power protect the chip itself is "hiccups", chosen parameters can be used directly,

CodePudding user response:

The

reference 5 floor Milkshake の Milktea response:

Over-current protection is worthy to be discussed;
When the equipment failure over-current, for example, what kind of protection measures should be taken right?
Fluctuations in flow such as equipment, what kind of protection measures should be taken right?
Flow in open way is the comparison of traditional insurance, with current limiting the possible risk in the equipment is short circuit,
Also called "hiccups" under the condition of short-circuit equipment is dangerous,
So my idea is to delay self-locking, equivalent to the role of the fuse, more insurance,
Burp circuit design also is not difficult, should be designed as about 555,

CodePudding user response:

According to the common analysis, if the delay or over-current, can determine fault, must disconnect, this is the right treatment,
Because the delay have skipped the fluctuation situation, however, delay time and determines the protection sensitivity and performance, time is too long could lose protection equipment, time is too short and possible misjudgment surge, are two sides of things, sometimes difficult trade-offs,
Similarly "hiccups" approach has two sides,
Can only say that according to the characteristics of different equipment to determine a more appropriate delay time, the coordination of two sides,

CodePudding user response:

Made a simple circuit can LM358, if you want to add the lock, then can add a 393 or 555, online many specific circuit