The LED constant-current driver circuit based on LM2734

Published:2011/8/20 2:12:00 Author: | Keyword: constant-current driver | From:SeekIC

LM2734 is 1A buck regulator.Based on the LM2734 constant-current driver circuit (shown as above),the circuit uses LM321 operational amplifier to obtain the voltage of the sampling resistor Rset,then combines the other resistor and capacitor to form a complete,high-efficiency power LED constant current driver circuit.In actual use,some LED constant current driver circuit can get feedback voltage directly from the sampling resistor,it is shown as figure.



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