Power supply with adjustable power

Abstract

The utility model discloses a power-adjustable power supply comprising a circuit board, and the circuit board is provided with a color temperature control IC or a control single-chip microcomputer, a transformer circuit, a main switch MOS tube, a first adjusting MOS tube, a second adjusting MOS tube, a first resistor, a second resistor and a third resistor. The output end of the transformer circuit is connected with the main switch MOS tube; the ends of the first resistor, the second resistor and the third resistor are connected to the main switch MOS tube, and the first adjusting MOS tube is connected to the first resistor and a pin of the color temperature control IC or the control single-chip microcomputer. According to the utility model, the structure arrangement is reasonable, the adjustment of output power is realized through the operation of the main switch MOS tube and the cooperation of the first adjustment MOS tube and the second adjustment MOS tube, and the power supply circuit is suitable for a power supply chip with a PWM adjustment function, a power supply chip without a PWM adjustment function, and a constant-voltage power supply or a constant-current power supply, is beneficial to the improvement of the application range, and is more convenient to adjust.

Description

Technical Field

[0001] The utility model belongs to the technical field of power supplies, and particularly relates to an adjustable power supply. Background Art

[0002] The switching power supply is a general variable light integrated circuit in the market, which is mainly used to adjust the output current of the constant current LED drive power supply in the LED lighting field. By changing the power supply output current, the brightness of the lamp is adjusted. In the prior art, its power adjustment output is mostly realized by a power chip cooperating with a PWM signal. Although it can meet the usage requirements in general situations, in some circuits without a PWM signal, it cannot effectively achieve adjustment, so its applicability and practicability are limited. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an adjustable power supply with reasonable structural settings and beneficial to improving applicability.

[0004] The technical solution to achieve the purpose of the utility model is an adjustable power supply, including a circuit board, on which a color temperature control IC or a control single-chip microcomputer, a transformer circuit, a main switch MOS transistor, a first adjustment MOS transistor, a second adjustment MOS transistor, a first resistor, a second resistor and a third resistor are arranged;

[0005] The output end of the transformer circuit is connected to the main switch MOS transistor;

[0006] The ends of the first resistor, the second resistor and the third resistor are all connected to the main switch MOS transistor, and the first adjustment MOS transistor is connected to the pins of the first resistor and the color temperature control IC or the control single-chip microcomputer, and the second adjustment MOS transistor is connected to the pins of the second resistor and the color temperature control IC or the control single-chip microcomputer;

[0007] The other end of the first resistor, the source electrode of the first adjustment MOS transistor and the source electrode of the second adjustment MOS transistor are grounded.

[0008] Further preferably: The two control pins of the color temperature control IC or the control single-chip microcomputer are respectively connected to the gates of the first adjustment MOS transistor and the second adjustment MOS transistor.

[0009] Further preferably: The first resistor, the second resistor and the second resistor are connected to the source electrode of the main switch MOS transistor.

[0010] Further preferably: The main switch MOS transistor, the first adjustment MOS transistor and the second adjustment MOS transistor are all N-channel MOS transistors.

[0011] The utility model has positive effects: The structure of the utility model is reasonably arranged. It is provided with a main switch MOS transistor, a first regulating MOS transistor, and a second regulating MOS transistor, which cooperate with a first resistor, a second resistor, and a third resistor to adjust the output power. During use, the output power is adjusted by operating the main switch MOS transistor and cooperating with the first regulating MOS transistor and the second regulating MOS transistor. It can be applied to power chips with PWM regulation functions or power chips without PWM regulation functions, and can also be applied to constant voltage power supplies or constant current power supplies, which is beneficial to expanding its application scope. Moreover, the adjustment is more convenient, with strong applicability and good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to make the content of the utility model easier to be clearly understood, the following further details the utility model according to specific embodiments in conjunction with the drawings, where:

[0013] Figure 1 is a structural schematic diagram of the utility model;

[0014] Figure 2 is a circuit schematic diagram of the utility model.

[0015] Reference numerals: circuit board 1, color temperature control IC or control single-chip microcomputer 2, transformer circuit 3, main switch MOS transistor 4, first regulating MOS transistor 5, second regulating MOS transistor 6, first resistor 7, second resistor 8, third resistor 9. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the utility model.

[0017] Embodiment

[0018] See Figures 1 to 2As shown in the figure, an adjustable power supply includes a circuit board 1, on which a color temperature control IC or a control single-chip microcomputer 2, a transformer circuit 3, a main switch MOS transistor 4, a first regulating MOS transistor 5, a second regulating MOS transistor 6, a first resistor 7, a second resistor 8, and a third resistor 9 are provided. In this embodiment, the circuit board is a PCB board, and the transformer circuit, the first resistor, the second resistor, and the third resistor are all conventional structures of the prior art and are only simply applied. Moreover, the main switch MOS transistor, the first regulating MOS transistor, and the second regulating MOS transistor are all N-channel MOS transistors. When connecting, the output end of the transformer circuit is connected to the main switch MOS transistor; the ends of the first resistor, the second resistor, and the third resistor are all connected to the main switch MOS transistor, and the first regulating MOS transistor is connected to the pins of the first resistor and the color temperature control IC or the control single-chip microcomputer, and the second regulating MOS transistor is connected to the pins of the second resistor and the color temperature control IC or the control single-chip microcomputer; the other end of the first resistor, the source electrode of the first regulating MOS transistor, and the source electrode of the second regulating MOS transistor are grounded. When in use, the power supply is adjusted by operating the main switch MOS transistor, and the color temperature control IC or the control single-chip microcomputer is used to control the first regulating MOS transistor 5 and the second regulating MOS transistor, so as to realize the adjustment of the output power. It can be applied to a constant voltage power supply and a constant current power supply, and it is also applicable to a power supply chip with a PWM power adjustment function and a power supply chip without a PWM power adjustment function, which is beneficial to improving its application range.

[0019] In the actual application process, the two control pins of the color temperature control IC or the control single-chip microcomputer are respectively connected to the gates of the first regulating MOS transistor and the second regulating MOS transistor. The first resistor, the second resistor, and the second resistor are connected to the source electrode of the main switch MOS transistor.

[0020] The utility model has positive effects: The structure of the utility model is reasonably arranged. It is provided with a main switch MOS transistor, a first regulating MOS transistor, and a second regulating MOS transistor to cooperate with the first resistor, the second resistor, and the third resistor to adjust the output power. When in use, the output power is adjusted by operating the main switch MOS transistor and cooperating with the first regulating MOS transistor and the second regulating MOS transistor. It can be applied to a power supply chip with a PWM adjustment function and a power supply chip without a PWM adjustment function, and at the same time, it can be applied to a constant voltage power supply or a constant current power supply, which is beneficial to improving its application range. Moreover, the adjustment is more convenient, the applicability is strong, and the practicability is good.

[0021] The standard parts used in this embodiment can be directly purchased from the market. For the non-standard structural components described in the specification, they can also be directly processed without any doubt based on the existing common technical knowledge. At the same time, the connection methods of each component adopt the mature conventional means in the existing technology, and the machinery, parts and equipment all adopt the conventional models in the existing technology. Therefore, no specific description will be made here.

[0022] Obviously, the above-mentioned embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And these obvious changes or modifications derived from the essential spirit of the present utility model still fall within the protection scope of the present utility model.

Claims

1. An adjustable power supply, comprising a circuit board, characterized in that: The circuit board is provided with a color temperature control IC or a control single chip, a transformer circuit, a main switch MOS tube, a first regulating MOS tube, a second regulating MOS tube, a first resistor, a second resistor and a third resistor; The output end of the transformer circuit is connected to the main switch MOS tube; The ends of the first resistor, the second resistor and the third resistor are all connected to the main switch MOS tube, and the first regulating MOS tube is connected to the pin of the first resistor and the color temperature control IC or the control microcontroller, and the second regulating MOS tube is connected to the pin of the second resistor and the color temperature control IC or the control microcontroller; The other end of the first resistor, the source of the first regulating MOS tube and the source of the second regulating MOS tube are grounded.

2. The adjustable power supply according to claim 1, characterized in that: The two control pins of the color temperature control IC or the control single chip are respectively connected to the gates of the first regulating MOS tube and the second regulating MOS tube.

3. The adjustable power supply according to claim 1, characterized in that: The first resistor, the second resistor and the second resistor are connected to the source of the main switch MOS tube.

4. The adjustable power supply according to claim 1, characterized in that: The main switch MOS transistor, the first regulating MOS transistor and the second regulating MOS transistor are all N-channel MOS transistors.

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