Definition and use of power regulators

*Published on March 23, 2023 at 10:23:08 * Views: 11

Do you remember when you were in school, we were told that the resistance voltage would drop. Isn't using only resistance to reduce voltage a simple solution according to Ohm's Law? However, resistors will lower the voltage based on the current flowing through them. When your part starts to consume less current, it will quickly rise and disrupt the voltage.

You need something better; Voltage is independent of load current. The voltage divider is the next simplest way to repair your head. This involves two resistors, but hey, if they can be plugged in, they can also work. Another troublesome issue: When your component begins to absorb so much current, the output of the voltage divider drops - the top resistor cannot keep up with the current demand Now you really hope to have heard of this in school. By reducing the resistance value, you may be able to solve this problem, but this will cause both resistors to consume too much current, which may damage your current budget and become overheated with the risk of immediate failure.

What else can be done? Zoom in! Of course, you will need to spend several hours giving lectures on this topic. Why not add an NPN transistor as a voltage follower? The bias voltage of the voltage divider can be connected to the base, the 12V rail input can be connected to the collector, and the output can be connected to the emitter, thus solving the problem.

Of course, the fix is effective, but it leaves you with an annoying feeling - you have already used three pieces and are perfectly repeating the error while checking the performance of the 12V power rail. Of course, this is an amplifier that lacks intelligence to compensate for itself. You can replace the bottom resistor of the voltage divider with a Zener diode, but the current required to correctly bias the Zener diode (for temperature coefficient and drift, etc.) is almost as much as what your component consumes, which is meaningless.

Isn't there a simpler way? Doesn't the black box require anything to lower the voltage? Similar pressure cycles (including mine) have affected millions of EEEs around the world. Of course, not all problems are related to voltage drop, but EEE laboratories are popular everywhere in similar situations!

But fortunately, it is precisely this part that is needed. In addition to the earliest commercialized voltage regulators, current regulators were also the earliest to be implemented.

If you have looked at the data sheet of a voltage regulator, you will be surprised to find that their circuit design can reduce voltage and maintain cleanliness - a stable voltage regulator, feedback and compensation amplifier, and half a good power output. Of course, if we can cram so much technology into our own phones, why not create a to-92 kit with voltage control?

Some batteries consume no more than a few mA, which is one thousandth of a millionth of an ampere! They are getting stronger day by day. Even better, some are also equipped with short-circuit and overheat protection