How to calculate the current after the voltage is stepped down by the Zener diode?

vincent.liu

How to calculate the current after the voltage is stepped down by the Zener diode? [Copy link]

As shown in the figure, how much current can a 10-ohm resistor theoretically provide?

vincent.liu

If the voltage-stabilizing diode is 1/2W, 12V,
and the voltage meter measures 10V on the left side of the 10Ω resistor, (10V voltage is obtained after the voltage-stabilizing diode is broken down), is the maximum current that the resistor can obtain 1A?

呜呼哀哉

What does it have to do with 10 ohms? It has to do with your 1K and the power of your voltage regulator tube.

qwqwqw2088

What is the load behind the 10 ohm?

maychang

vincent.liu posted on 2021-11-18 14:19 If the voltage regulator diode is 1/2W, 12V, if the voltmeter measures the input voltage on the left side of the 10 ohm resistor to be 10V, (after breaking down the voltage regulator diode, 10V is obtained...

"Is the maximum current that a resistor can obtain 1A?"

As long as you remember that the minimum current in the Zener diode is a certain value (which can be found in the manual), you can calculate the maximum current that can be obtained by the load. In this example, even if the current in the Zener diode is zero, the maximum current that can be obtained by the load is 24V/1010 ohms, about 23.7mA.

baopodao

The current of the Zener diode is related to the current of the load. If the voltage of the Zener diode is 10V, the current of the Zener diode is 0 and the current of the load is 24mA.

shuangchafeng

If the 12V Zener diode works, less than 12 mA of current will flow through the 10 ohm resistor.

埋土书生

The voltage regulator diode is analyzed as a voltage source, provided that current flows through the voltage regulator diode.