APPARATUS FOR CONTROLLING CURRENT

摘要

PURPOSE: A current control device is provided to consistently control a current according to the change of an input and/or output voltage of a transformer unit by detecting and comparing the voltage from an auxiliary coil part of the transformer unit. CONSTITUTION: A filter unit(11) removes noise in AC power. A rectifier(13) supplies power to a transformer unit(15) by rectifying the power output from the filter unit. The transformer unit has an auxiliary coil part(15A). A first switching unit(23) controls the operation of the transformer unit. A voltage detecting unit(31) detects a voltage induced in the auxiliary coil part. A voltage comparing unit(37) compares a reference voltage and the detected voltage. A controller(21) controls a switching-on section of the switching unit. [Reference numerals] (11) Filter unit; (13) Rectifier; (15) Trans unit; (15A) Auxiliary coil part; (17) DC output unit; (19) Light emitting unit; (21) Controller; (23) First switching unit; (25) Feedback unit; (31) Voltage detecting unit; (35) Second switching unit; (37) Voltage comparing unit