LED IC an American listed 50W controller

An American company (Linear Technology Corp.) launched a 50W LED power supply controller IC "LT3755" and "LT3755-1". Maximum drive 14 1A white LED. Mainly for automotive, industrial and architectural lighting. LED IC "50W power supply controller of American technology LT3755"

The input voltage range is 4.5 ~ 40V. Output current can be detected by the high voltage side of the LED column. For the input voltage boost, buck, lift pressure can be used. The output voltage is 2.9 ~ 60V. Conversion frequency can be set in the range of 100k ~ 1MHz. The efficiency of the boost mode exceeds 94%. Dimming using PWM signal. The dimming ratio is 3000:1. CTRL pin can be used to simulate the 10:1 dimming. The LT3755 is equipped with an open LED pin, while the LT3755-1 is equipped with a frequency synchronization pin.

Packages are 3mm square 16 pin QFN. Depending on the temperature assurance, the "I" and "E" levels can be provided. The I level is based on the test results, the work junction temperature in the -40 range 125 C in action guarantee. E level is designed to ensure that the temperature range. Currently in production supply. When the volume of the purchase of 1000 tax reference unit price, I level of 347 yen starting, E level of starting price of 303 yen.

Source: China Automotive Network