Circuit and method for operating a lighting unit and a luminaire having a circuit of this kind
A light-emitting unit and circuit technology, applied in electroluminescent light sources, light sources, electric light sources, etc., can solve problems such as reducing circuit efficiency and achieve the effect of ensuring brightness
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[0037] figure 1 A circuit is shown for operating at least one semiconductor light-emitting element 120 by means of a power source, for example a battery 110 supplying a supply voltage V1.
[0038] The positive terminal of battery 110 is connected to node 101 , and the negative terminal of battery 110 is connected to node 102 . The cathode of diode D1 is connected to node 101 , and the anode of diode D1 is connected to node 104 . A resistor R2 is arranged between nodes 104 and 102 . A capacitor C1 is arranged in parallel with the diode D1. Node 104 is connected to node 105 via resistor R3. The base and collector of pnp transistor T1 and the base of pnp transistor T2 are connected to node 105 . The emitter of transistor T1 is connected to node 106 via resistor R6. A resistor R5 is arranged between node 101 and node 106 . The cathode of diode D2 is connected to node 106 and the anode of diode D2 is connected to the drain terminal of n-channel Mosfet T3. The source terminal...
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