Adjustable direct-current stabilized voltage power supply circuit

A DC stabilized power supply and circuit technology, applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., to achieve the effect of fewer components, convenient assembly, and high reliability

Inactive Publication Date: 2017-06-20
张凤军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the circuit must be simple and rel

Method used

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  • Adjustable direct-current stabilized voltage power supply circuit
  • Adjustable direct-current stabilized voltage power supply circuit
  • Adjustable direct-current stabilized voltage power supply circuit

Examples

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Embodiment Construction

[0015] exist figure 1 Among them, the adjustable DC regulated power supply circuit includes an adjustable integrated voltage regulator, a voltage compensation circuit, and a soft start circuit.

[0016] exist figure 2 Among them, IC is a three-terminal integrated voltage regulator. Transistor T, resistor R 3 , R and capacitor C form a soft start circuit. Resistance R 4 and diode D to form a voltage compensation circuit. Capacitor C2 is an output filter capacitor.

[0017] exist image 3 Among them, the adjustable integrated voltage regulator adopts the LM317 series three-terminal integrated voltage regulator, because the voltage U between the 2 / 3 pins of the LM317 32 for a stable reference voltage (1.25V), so , where R 1 is a fixed resistor, so adjust R 2 Can adjust the output voltage U O . and U O The minimum value is 1.25V. The voltage compensation circuit consists of a resistor R 4 Composed of diode D to offset the 1.25V minimum output voltage of LM317, I...

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PUM

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Abstract

The adjustable DC stabilized power supply circuit includes an adjustable integrated voltage stabilizer, a voltage compensation circuit, and a soft-start circuit. The LM317 series three-terminal integrated voltage stabilizer is used as the adjustable integrated voltage stabilizer. 4 and diode D to form a voltage compensation circuit, consisting of transistor T, resistor R 3 , R and capacitor C form a soft-start circuit. The output voltage is continuously adjustable from 0V, the circuit is simple and reliable, and it can output enough current.

Description

technical field [0001] The invention relates to an adjustable DC voltage stabilized power supply circuit. Background technique [0002] For electronic circuits to work normally, the role of the power supply cannot be ignored. The performance of the power supply has a great impact on the service life and performance of circuits, electronic instruments and electronic equipment, especially in circuits and equipment with inductive loads ( Such as motors), the performance requirements for the power supply are higher. In many occasions where DC motors are used, it is required to provide a DC power supply whose output can be continuously adjusted from 0V to 24V for the motor drive circuit, and the power supply is required to have a protection function. [0003] Therefore, a DC stabilized power supply circuit with sufficient voltage regulation range and load capacity is required, which requires the output voltage to be continuously adjustable starting from 0V; the selected devices ...

Claims

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Application Information

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IPC IPC(8): G05F1/565
CPCG05F1/565
Inventor 张凤军
Owner 张凤军
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