Constant current control device and television having the same

摘要

The invention provides a constant current control device and a television including the constant current control device. The constant current control device includes a constant current control module and a switched-mode power supply module used for providing a stable voltage for a load. The constant current control module includes a constant current source unit used for providing a reference current, a constant current control unit used for keeping a current flowing through the load constant as the reference current, and a feedback unit used for keeping the voltage of the constant current control unit constant. The present invention, with a simple circuit structure, implements the objective of precisely controlling a current passing through a load.

主权项

1. A constant current control device, comprising:
a constant current control module; a switched-mode power supply module, used for providing a stable voltage for a load; wherein the constant current control module comprises:
a constant current source unit used for providing a reference current;a constant current control unit used for keeping a current flowing through the load constant as the reference current; anda feedback unit used for keeping the voltage of the constant current control unit constant, wherein an output terminal of the switched-mode power supply module is electrically connected to an input terminal of the load; an output terminal of the constant current source unit is electrically connected to a first input terminal of the constant current control unit; an output terminal of the load is electrically connected to a second input terminal of the constant current control unit; an output terminal of the feedback unit is electrically connected to a control terminal of the constant current control unit; both of a first input terminal of the feedback unit and a first input terminal of the switched-mode power supply module are electrically connected to a first output terminal of the constant current control unit; and a second input terminal of the feedback unit and a second input terminal of the switched-mode power supply module are both connected to a second output terminal of the constant current control unit.