CN215733528U - Battery voltage stabilization module - Google Patents

Abstract

The utility model designs a battery voltage stabilizing module, which comprises: the power amplifier comprises a low-power triode, a voltage stabilizing diode, a resistor and a capacitor; the base level of the triode is connected with the resistor, the other end of the resistor is respectively connected with the anode of the diode and the cathode of the diode, the collector of the triode is connected with the base level of the triode, the cathode of the diode and the capacitor, and the other end of the capacitor is connected with the anode of the diode. The module is very used in a scene of charging equipment such as a digital instrument by utilizing the voltage stabilization for charging three lithium batteries, and the material consumption cost in the use of the instrument can be greatly saved.

Description

Battery voltage stabilization module

Technical Field

The utility model relates to the technical field of power generation, supply, power utilization and other power plants and power systems, in particular to a battery voltage stabilizing module which is particularly suitable for equipment which utilizes the voltage stabilization of charging of three lithium batteries to supply power to equipment such as a digital instrument.

Background

Each circuit board is provided with a power supply chip, and loss exists in the linear power supply chip or the switching power supply chip. In general, the loss of the switching power supply chip is much smaller than that of the linear power supply chip, but the noise of the switching power supply chip is larger than that of the linear power supply chip. Therefore, when designing a product, good consideration is also required for a specific project.

The quiescent current is the current directly output to ground by the power chip, and is not the current supplied to the load. Because the power supply chip only plays a role in voltage stabilization in the circuit and does not participate in the realization of the functions of the circuit board, the loss of the power supply chip is expected to be as small as possible. How to reduce the intrinsic loss of the power supply chip is a problem to be discussed in the present invention.

Disclosure of Invention

In order to solve the above problems, the present invention provides a special battery voltage stabilizing module with low electrostatic current and low power consumption, which comprises: the circuit comprises a low-power NPN triode T1, a low-power PNP triode T2, voltage stabilizing diodes DW1 and DW2, a resistor R1 and a capacitor C; the base b2 of the triode T2 is connected with the resistor R1, the other end of the resistor R1 is respectively connected with the anode of the diode DW1 and the cathode of the diode DW2, the collector C2 of the triode T2 is connected with the base b1 of the triode T1, the cathode of the diode DW1 and the capacitor C, and the other end of the capacitor C is connected with the anode of the diode DW 2.

In one embodiment of the novel use, the capacitor C is connected in parallel between the cathode of the zener diode DW1 and the anode of the zener diode DW 2.

In one embodiment of the novel use, the current amplification beta of the transistor T1 is between 40 and 70.

In one embodiment of the novel usage model, the current amplification factor β of the transistor T2 is between 250 and 300.

In one embodiment of this novel use, the zener diodes DW1, DW2 select diodes that are capable of establishing a zener with a small current. Optionally TL431 or TL 432.

In one embodiment of the novel usage model, the voltage stabilizing module is applied to power supply of digital instrument equipment.

In one embodiment of the novel usage, the average quiescent current of the circuit is 55 microamperes.

In one embodiment of the novel use, in operation, current flows from the emitter stage e2 of transistor T2, and most of the current flows from the anode of diode DW2 to the cathode.

In one embodiment of the new usage model, during operation, voltage is output from the emitter e1 of transistor T1.

Compared with the prior art, the utility model has the beneficial technical effects that:

adopt this utility model's voltage stabilizing module, the voltage of following T1 triode e1 output also is unchangeable basically to the mesh that reduces the loss of power itself of this application has been reached.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings required to be used in the embodiments or the background art of the present application will be described below.

Fig. 1 is a schematic diagram of a voltage stabilization module provided in an embodiment of the present application;

t1: a low-power NPN triode;

t2: a low-power PNP triode;

DW1/2 voltage regulator diode 1/2;

r1: a resistor R1;

c: and (4) a capacitor.

Detailed Description

For ease of understanding, terms referred to in the present application will be first introduced.

1. Semiconductor triode

Semiconductor transistors (BJTs) are also commonly referred to as transistors. BJTs are generally classified into two types according to the results: NPN type and PNP type.

The NPN BJT is a three-layer semiconductor process with two PN junctions. A thin P-type semiconductor is in the middle and an N-type semiconductor is on each side. One lead from each of the three semiconductors is the three electrodes of the BJT, which are called emitter e, base b and collector c, respectively, and each corresponding semiconductor is an emitter region, a base region and a collector region. The PNP BJT is also made of three layers of semiconductors with two PN junctions, but at the moment, the middle is an N-type semiconductor, and two sides are P-type semiconductors. The NPN type and PNP type BJTs have almost the same characteristics except that the polarities of the respective electrodes and the current flow direction are different.

In order to better understand the dedicated low-quiescent-current low-power-consumption voltage stabilizing module disclosed in the embodiment of the present invention, a system to which the embodiment of the present invention is applied will be described first.

Referring to fig. 1, fig. 1 is a schematic diagram of a dedicated low quiescent current and low power consumption voltage regulator module according to an embodiment of the present application. The battery voltage stabilization module provided by the present application will be described in detail below with reference to the accompanying drawings.

Fig. 1 shows a dedicated low quiescent current low power consumption battery regulator module, which comprises: the circuit comprises a low-power NPN triode T1, a low-power PNP triode T2, voltage stabilizing diodes DW1 and DW2, a resistor R1 and a capacitor C; the base b2 of the triode T2 is connected with one end of a resistor R1, the other end of the resistor R1 is respectively connected with the anode of a diode DW1 and the cathode of a diode DW2, the collector C2 of the triode T2 is connected with the base b1 of the triode T1, the cathode of the diode DW1 and a capacitor C, and the other end of the capacitor C is connected with the anode of a diode DW 2; and the capacitor C is connected in parallel to the cathode of the zener diode DW1 and the anode of the zener diode DW 2.

In operation, current flows from the emitter stage e2 of transistor T2, most of the current flows from the anode of diode DW2 to the cathode, and voltage is output from the emitter stage e1 of T1. Since most of the output load current flows back through the cathodes of the zener diodes DW1 and DW2, the output load current changes little, the voltage of the pin 1 regulated by DW1 to EDN is basically unchanged, the Vbe of the transistor T1 also changes little, and therefore the voltage output from the transistor T1, transistor e1, is also basically unchanged. Therefore, the purpose of reducing the loss of the power supply is achieved.

When the circuit works, the current input from the pin 1 of the module flows back to the negative power supply through the pin e2 of the transistor T2 → the pin b2 of the transistor T2 → the pin of the resistor R1 → the pin 1 of the Zener diode DW2 → the pin 1 of the DW2, the current is very small because the resistor R1 is in the megaohm level, and the current flows out from the pin c2 of the transistor T2 → the pin 1 of the Zener diode DW1 → the pin 1 of the pin 2 Zener diode DW2 of the Zener diode DW1 → the pin 2 of the Zener diode DW2 after being amplified by the transistor T2. The capacitor is connected in parallel between pin 1 of the voltage stabilizing diode DW1 and pin 2 of the DW2, so that interference can be prevented, and the equivalent internal resistance of the power supply output can be reduced.

In order to improve the reliability and load capacity of the circuit, the current amplification factor β of the transistor T2 is within 40-70, and the current amplification factor β of the transistor T1 is within 250-300. The voltage stabilizing diodes DW1 and DW2 can build rated voltage stabilizing diodes such as TL431 and TL432 by selecting small current; the voltage value is selected according to the difference of the output voltage value.

The average value of the quiescent current of the circuit is 55uA, and the current absorbed from a power supply when the circuit is loaded is the load current plus the quiescent current. The quiescent current increases with increasing supply voltage.

In practice, the voltage is stabilized by 10V-12.4V, the current of more than 8V and 20mA can be output, and the general power supply current of a digital instrument is within 5 mA; when the output is less than 10mA, the voltage can reach 8.67V.

It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the modules described above may refer to the corresponding process in the foregoing method embodiments, and is not described herein again.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A battery voltage stabilization module, comprising: the circuit comprises a low-power NPN triode T1, a low-power PNP triode T2, voltage stabilizing diodes DW1 and DW2, a resistor R1 and a capacitor C; the base b2 of the triode T2 is connected with the resistor R1, the other end of the resistor R1 is respectively connected with the anode of the diode DW1 and the cathode of the diode DW2, the collector C2 of the triode T2 is connected with the base b1 of the triode T1, the cathode of the diode DW1 and the capacitor C, and the other end of the capacitor C is connected with the anode of the diode DW 2.

2. The module of claim 1, wherein the capacitor C is connected in parallel between the cathode of the zener diode DW1 and the anode of the zener diode DW 2.

3. The module of claim 2, wherein the current amplification β of transistor T1 is between 40-70.

4. The module as claimed in claim 2, wherein the current amplification β of the transistor T2 is between 250 and 300.

5. The module of claim 2, wherein the zener diodes DW1, DW2 select diodes that have a small current to establish a zener voltage.

6. The module of claim 5, wherein the zener diodes DW1, DW2 are TL431 or TL 432.

7. A module according to any one of claims 1 to 6, characterised in that the voltage regulation module is applied to the power supply of a digital instrument device.

8. The module of claim 7 wherein the quiescent current of the circuit has an average value of 55 microamperes.

9. A module according to any one of claims 1 to 6, characterized in that, in operation, current flows from the emitter stage e2 of transistor T2, the majority of the current flowing from the anode of diode DW2 to the negative.

10. A module according to any one of claims 1 to 6, characterised in that, in operation, a voltage is output from the emitter stage e1 of transistor T1.

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