RU1775718C - Voltage stabilizer - Google Patents

Abstract

The invention relates to electrical engineering and can be used in secondary power supplies of electronic equipment. The goal is to expand the functionality of the stabilizer. The device contains a reference zener diode 1 with a current-sensing element 2, a voltage follower 3. Introduction of resistor current sensors 5-1 ... 5-N, limit diodes 4-1 ... 4-N and N additional output terminals 8-1 .. .8-N and connecting each of N additional output terminals to the connection point of the zener diode 1 with the input of the repeater 3 through the corresponding diode 4-1 ... 4-N and to the output of the repeater 3 through the corresponding sensor 5-1 ... 5-N allowed to form N additional outputs for connecting N additional loads with simultaneous limitation output voltage across all channels when overloading at least one of N additional channels and indicating the emergency channel when using the LED as a 4-1 ... 4-N limit diode. 1 C.p. f-l 1 ill. (L C

Description

The invention relates to electrical engineering and can be used in secondary power supplies of electronic equipment.

The aim of the invention is to enhance the functionality.

A circuit diagram of a voltage stabilizer is shown in the drawing.

The device comprises a reference zener diode 1, a current-picking element 2, a voltage follower 3, N limit diodes 4-1 ... 4-N. N resistor current sensors 5-1 ... 5-N, input terminal 6 for connecting the supply voltage, output terminals 7, 8-1. .8-N for connecting loads, common bus 9. Zener diode 1 is connected to pin 6 via pin 2 through element 2, to the input of repeater 3. to the first

of the same name, the offset diode 4-1 ... 4-N, the second leads of the same name are connected to the terminals 8-1 ... 8-N, respectively, and to the first leads of the sensors 5-1 ... 5-N, respectively, the second leads which are connected to the output of the repeater 3 and terminal 7. To the bus 9 are connected the second output of the zener diode 1, the common output of the repeater 3, the grounded terminals of the loads and the power source. The power input of the repeater 3 is connected to terminal 6.

The resistances RS of the resistors 5-1 .5 - N are determined by the difference in the threshold voltage V4 of the corresponding diode 4-1 ... 4-N, the input control voltage Vva of the repeater 3 and the threshold value of the output current le of the corresponding output 8-1. ..8-N and is found by the formula

h

(L

-1

oo

R5 (Vd-VY3) / l8.

Element 2 provides the necessary operating current through the zener diode 1, which is significantly less than the load current for any of the outputs 8-1 ... 8-N.

The operation of the device is as follows. If the output currents through the terminals 8-1 ... 8-N do not exceed the threshold values, then the voltage drop across the resistors 5-1 ... 5-N is insufficient to open the corresponding diodes 4-1 ... 4-N which in this case remain closed and do not affect the operation of the device. The follower 3 provides at the output 7 the full voltage of the follower close to the reference voltage of the zener diode 1, and at the outputs 8-1 ... 8-N it is less than the reference by the magnitude of the voltage drop across the resistors 5-1 ... 5- N. If at least one of the output terminals 8-1 ... 8-N has an output current that exceeds the threshold value, a voltage sufficient to open the corresponding one of diodes 4-1 will be allocated on the corresponding resistor 5-1 ... 5-N ... 4-N, through which the current of element 2 flows. As a result, the zener diode 1 will exit the operating mode and the voltage at all terminals 8-1 ... 8-N will begin to decrease. If LEDs are used as diodes 4-1 ... 4-N, then information about the channel in which the overload occurs will be displayed.

Thus, in comparison with the prototype, this stabilizer has wider functionality due to the formation of N additional outputs while limiting the output voltage across all channels at

overload at least one of the N additional channels.

Claims (2)

1. A voltage stabilizer containing a reference zener diode, one output of which is connected to an input terminal for connecting a supply voltage source through a current-sensing element, to a voltage follower input directly and with an output terminal for connecting a load through an offset limit diode, a common bus for connecting grounded power supply, load, voltage follower and the second output of the reference zener diode, characterized in that, in order to expand the functionality, it is introduced s N resistor current sensors, N-1 additional limiting diodes and N additional output terminals, and N resistor current sensors with one terminal connected to the output of the voltage follower, and other conclusions to the corresponding additional output terminals, N-1 additional limiting direct biased diodes with the same terminals are connected to the input of the voltage follower, and N limit diodes with the same terminals are connected to the corresponding N additional output terminals. 2. The stabilizer according to claim 1, characterized in that, in order to provide an indication of the presence of an overload in the output circuits, light emitting diodes are used as limiting diodes.