A fixed frequency, current mode architecture ensures stable operation over a wide range of supply and output voltages. A frequency adjust pin enables the user to program the frequency between 200kHz and 2MHz to optimize efficiency while minimizing external component size. Its thermally enhanced 5mm x 7mm QFN package provide a highly compact solution footprint for 100W LED applications.
The LT3476 senses output current at the high side of the LED, enabling buck, buck-boost or boost configurations. With an external sense resistor, the user programs the output current range of each channel. Each of the 4 independent driver channels utilizes an internal 1.5A, 36V NPN switch. Other features include open LED protection and thermal limiting.
The LT3476EUHF is available from stock in a thermally enhanced 38-lead 5mm x 7mm DFN package. 1,000-piece pricing starts at $4.64 each and the device is available from stock.