BlackBuck 8M - 8 Amps compact driver for portable and engraving devices.
 
The high-performance, compact buck LED/laser diode driver with thermal protection (external NTC sensor) . Can be controlled/modulated by an external sources like DAC, PWM or analog modulated signal. It has 5V reference voltage output for connecting an external potentiometer as a modulation source. High-quality onboard multi-turn trimmer helps to the fine-tuning of the output current. The driver can operate with the current up to 3A without an external heat sink, but it requires a heat sink for currents above 3A. It works fine with 2 or 3 cells Li-Ion or Li-Po batteries or 7-12V DC PSU.
 
Specs:
Output (drive) current
1000... 8000 mA +/- 5%
Modulation input 
0...5V or 5V TTL/PWM
Conversion efficiency
>93%
Modulation rise/fall time
40/60ms
Start-up delay
30ms
Sine-wave modulation bandwidth
4 KHz
Overheat protection shutdown t°
50° C / 122° F +/- 5%
PCB dimension
16*17*6 mm
 
The item comes with NTC sensor
Avoid short circuit and reverse polarity connection, it will damage the driver!
The contact pads on the PCB are very small, if you do not have enough skills in soldering, I highly recommend not to buy this driver.