Current-balancing supply circuit with multiple groups of DC loads

Abstract

The invention discloses a current-balancing supply circuit with multiple groups of DC loads, which is used for driving a first group of DC loads and a second group of DC loads and at least comprises a current supply circuit, a current stabilizing circuit, a first output rectifying circuit and a second output rectifying circuit, wherein the current supply circuit is used for receiving the energy of an input voltage so as to produce a first current or a first voltage; the current stabilizing circuit is connected with the power output end of the current supply circuit and at least comprises a first current stabilizing transformer and a second current stabilizing transformer; the first output rectifying circuit is connected between the first group of DC loads and the first output end of the current stabilizing circuit and is used for rectifying and producing a first output current for the first group of DC loads; and the second output rectifying circuit is connected between the second group of DC loads and the second output end of the current stabilizing circuit and is used for rectifying and producing a second output current for the second group of DC loads. The invention ensures that the currents of all groups of DC loads are balanced and have the same luminance; and compared with the traditional circuit, the current-balancing supply circuit not only is simpler and has lower circuit complexity, but also has lower power consumption and higher circuit operating efficiency.

Description

technical field [0001] The invention relates to a power supply circuit, in particular to a current balanced power supply circuit for multiple groups of DC loads. Background technique [0002] In recent years, due to breakthroughs in light emitting diode (Light Emitting Diode, LED) manufacturing technology, the luminous brightness and luminous efficiency of light emitting diodes have been greatly improved, thus making light emitting diodes gradually replace traditional lamps and become new lighting components, widely used in For example, lighting applications such as household lighting devices, automotive lighting devices, handheld lighting devices, LCD panel backlights, traffic signal lights, and sign boards. [0003] Light-emitting diodes are DC loads. At present, in the application of multiple light-emitting diodes, because the characteristics of each light-emitting diode are different from each other, the current flowing through each light-emitting diode is different. Thi...

AI Technical Summary

Problems solved by technology

[0005] However, the traditional multi-group LED current balance power supply circuit uses linear voltage regulators and current mirrors, resulting in large circuit power loss and low circuit operation efficiency. Relatively more components are used and the circuit is more complicated.

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