| 摘要 |
<p>An LED linear intelligent dimming module comprises a load loop, which is connected between a positive electrode and a negative electrode of a power supply, and comprises in sequence a main constant current source (S), a sampling resistor (R1), a diode (D) and a load (RL) that are forward connected in series; a current amplification branch circuit, which comprises a secondary constant current source (S2), a driving tube (T1) and a bias resistor (R2), wherein the secondary constant current source (S2) is forward connected to a CE electrode phase of the driving tube (T1) in series, and then connected to the load (RL) in parallel, and the bias resistor (R2) is connected between a positive electrode of the load (RL) and a B electrode of the driving tube (T1); and a trigger optical coupler (OC1), wherein ends 1 and 2 of a light-emitting tube thereof are forward connected to the sampling resistor (R1) in parallel, and ends 3 and 4 of a transistor thereof are connected to the B electrode and an E electrode of the driving tube (T1) respectively. The module realizes dimming and constant current self-adaption, and the load thereof can dock with a traditional silicon controlled dimmer.</p> |
