Check the listing for details. Laser Diode LD Driver Board PCB 4.5A for 3.5W NDB7A75 3 Modes High Low Strobe. Condition: New. Listed at 3.70 USD. Laser Diode LD Driver Board PCB 4.5A for 3.5W NDB7A75 3 Modes High Low Strobe Specification: Input Voltage: 5.8-12V Circuit control: 5V circuit, constant current output Dimensions: 12 * 22mm (W * L) Reverse polarity protection: a unique reverse polarity protection design, no need to worry about the battery discharge burning plate Pin definition: 445nm driver board designed specifically for the pad. You only need to weld it according to the foot a triangular arrangement Polarity definition: module housing is positive,trailing bonding pad is negative Detail: This Laser Diode Driver PCB 4.5A Constant Current can be used to drive 3.5W NDB7A75 This is a 4.5 Amp laser diode driver with 3 modes, high, low, and strobe. It has an input voltage of about 8 to 12 volts. Most people will use 2 Lithium ion IMR or INR batteries at 8.4 volts. It is a buck driver with reverse polarity protection. It does not require a heat sink. Package:1 x Laser Diode LD Driver Board PCB 4.5A for 3.5W NDB7A75 3 Modes High Low Strobes 无标题文档