Features 16-50V 1-3A for buck high brightness LED driver is with 5000: 1 dimming function, which is practical. 2Supports maximum output power of 72W (36V 2A), LED driver has up to 1MHz switching frequency 3Single pin on off and brightness control can be finished by using DC voltage or PWM. 4Inherent open LED protection, which can keep over temperature drop current function for adjustable constant LED current with up to 97% efficiency. 5With function of high-end current detection, such LED driver board is easy to use in the practical life. Specification Item Type: LED Driver Module Pattern 1: H 1A 8-50V H 2A 8-36V H 3A 8-16V L 1A 6-16V L 2A 6-16V L 3A 6-16V Pattern 2: With Terminal Without Terminal (optional) Working Voltage: L-type DC 6-16V, H-type DC 8-50V (perfect for 6V 9V 12V 18V 24V 36V 48V LED driver) Output Current: 1A 2A 3A By Changing for RCS Resistance,Maximum Current: 4A Maximum Output Power: 72W (36V 2A) Current Regulation: 1 to adjustable resistance; 2 via PWM control Switching Frequency: Up to 1MHz Current Accuracy: Typical 5% output Intrinsic Open LED Protection: Support High Efficiency: Up to 97% Size: Approx. 45 x 21 x 16mm 1.77 x 0.83 x 0.63in Weight: Approx. 11 g 0.4 oz (without terminals) Approx. 14 g 0.5 oz (with terminals) Package List 1 x LED Driver Module