Item Type: LED Driver Module_x000D_Pattern 1: H 1A 8-50V / H 2A 8-36V / H 3A 8-16V / L 1A 6-16V_x000D_/ L 2A 6-16V / L 3A 6-16V_x000D_Pattern 2: With Terminal / Without Terminal (optional)_x000D_Working Voltage: L-type DC 6-16V, H-type DC 8-50V (perfect for 6V / 9V / 12V / 18V / 24V / 36V / 48V LED driver)_x000D_Output Current: 1A / 2A / 3A_x000D_By Changing for RCS Resistance,Maximum Current: 4A_x000D_Maximum Output Power: 72W (36V / 2A)_x000D_Current Regulation: 1 to adjustable resistance; 2 via PWM control_x000D_Switching Frequency: Up to 1MHz_x000D_Current Accuracy: Typical 5% output_x000D_Intrinsic Open LED Protection: Support_x000D_High Efficiency: Up to 97%_x000D_Size: Approx. 45 x 21 x 16mm / 1.77 x 0.83 x 0.63in_x000D_Weight: _x000D_Approx. 11 g / 0.4 oz (without terminals)_x000D_Approx. 14 g / 0.5 oz (with terminals) 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.1 x LED Driver Module