The power CW laser diode driver iC-HTG provides Automatic Current (ACC) or Power (APC) Control functionality operating an external scalable driver. For APC, the programmable logarithmic monitor resistor ranges from 100 Ω to 500 kΩ at a step width <4%. The logarithmic D/A converter sets the operating point better than 1%. Overcurrent, overtemperature, or standby will disable the laser. An external DC/DC converter can be controlled to optimize the total power dissipation.