Feature: 1. This 6-50V 1-3A buck LED driver with high brightness features a practical 5000:1 dimming function. 2. Supporting a maximum output power of 72W (36V / 2A), the LED driver boasts a switch frequency of up to 1MHz. 3. Simple on/off and brightness control can be achieved using DC voltage or PWM. 4. Built-in open LED protection, which can maintain over-temperature fall current function for adjustable constant LED current with up to 97% efficiency. 5. With advanced current sensing function, this LED driver board is easy to use in practical applications. 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 Output Current: 1A / 2A / 3A By changing the RCS resistance, Maximum Current: 4A Maximum Output Power: 72W (36V / 2A) Current Regulation: 1 via adjustable resistance; 2 via PWM control Switch Frequency: Up to 1MHz Current Accuracy: Typical 5% output Built-in 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