12v 10w Led Driver Circuit Diagram. As i want to use 9 parallel led of 1 2 watt and want to operate circuit at for 12 volt battery source led spec is 9 10 voff and 120 ma current please tell me what change is exaxtky required and lm 338 required heat sink or suggest any other good ckt for different combination like strings of 4 led 3 volt voff and 3 parallel series of this. 7 things to know before buying and installing 12v led strip lights 383 5k views.
And the only way to change the. The above circuit is designed to drive a led with 0 2a. As you can see the driver has nothing more than a lm317 ic and a resistor.
The formulae to determine the current is.
I have 12 battery and 12v 10w led bulp 5no s that bulps are connected in parallel the bulp takes 2amps lm338 regulator using but heat is very high so please give 12v dc to dc constant current and voltage drive circuit. However to use this led requires a power of 10w and 12v stabilized voltage so that leds are more durable long lasting without reducing the productivity of the light produced high power led s. C1 together with the inductor l0 and c2 make up a pie filter network for cacelling emi disturbenaces. Led current in amps 1 25 r3 so for a current of 550ma set r3 to 2 2 ohms you ll need a power resistor usually r3 power in watts 1 56 r3 this circuit also has the drawback that the only way to use it with a micro controller or pwm is to turn the entire thing on and off with a power fet.
