| 摘要 |
<p>Disclosed is a circuit for driving a high-luminance LED illumination lamp that may be substituted for a fluorescent light tube, the circuit comprising a power supply unit 100 for converting one input power to voltage appropriate to drive the high-luminance LED; a rectify unit 200 including a plurality of bridge diodes, for converting the voltage generated by the power supply unit 100 into DC voltage; a filter unit 300 including a plurality of electrolytic condensers, for flattening voltage by filtering ripple voltage applied from the rectify unit 200; a voltage control unit 400 including a regulator and a resistor, for receiving the DC voltage passing through the filter unit 300 and providing a PWM signal needed to drive the LED; a drive control unit 500 including a field effect transistor and resistors, for controlling on-off and amount of current flowing through the LED; and a current control unit 600 for controlling the amount of current by comparatively compensating a characteristic of current change of the LED affected by change of temperature.</p> |
