Linear Technology’s LT3761 is a 60 V DC-DC controller designed to operate as a constant-current source and constant-voltage regulator. Its internal PWM dimming generator makes it ideal for driving high-current LEDs, but it also has features making it suitable for charging batteries and supercapacitors. The IC’s 4,5 V to 60 V input voltage range makes it ideal for a wide variety of applications, including automotive, industrial and architectural lighting. It can drive up to fifteen 1 A white LEDs from a nominal 12 V input, delivering in excess of 50 Watts. The LT3761 has an internal PWM generator that delivers dimming ratios as high as 50:1 or it can utilise an external PWM signal, delivering dimming ratios of up to 3000:1.
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