Miniature dc-dc LED drivers from MicroPower Direct are specifically designed to power and control high-brightness LEDs (HBLEDs). The eight models comprising the LD48 series operate from a wide input voltage range of 7.0 to 60 V dc. Constant current output options include 150, 250, 300, 350, 500, 600, 700, or 1000 mA. Efficiency reaches to 97%. LED brightness (dimming) can be controlled by an analog voltage input or digitally from a pulse-width-modulated (PWM) input. The PWM input also may be used as a remote ON/OFF control input. Mean time between failure (MTBF) per MIL HDBK 217F is greater than 950 khrs. The drivers come in a compact MiniDIP case with an industry-standard pinout (units rated to IP67 are available with wire leads). Operating temperature ranges from −40 to +85°C ambient without the need for derating or heat-sinking. Devices are cooled via free-air convection.