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) 1、6-50V 1-3A for buck high brightness LED driver is with 5000: 1 dimming function, which is practical. 2、Supports maximum output power of 72W (36V / 2A), LED driver has up to 1MHz switching frequency 3、Single pin on / off and brightness control can be finished by using DC voltage or PWM. 4、Inherent open LED protection, which can keep over temperature drop current function for adjustable constant LED current with up to 97% efficiency. 5、With function of high-end current detection, such LED driver board is easy to use in the practical life. 1 x LED Driver Module