LT3492EUFD#PBF

LINEAR TECHNOLOGY  LT3492EUFD#PBF  发光二极管驱动器, 3输出, 升压, 降压, 降压-升压, 3V-30V输入, 2.1MHz开关, 40V输出, QFN-28

The is a triple output DC/DC Converter designed to operate as a constant-current source and is ideal for driving LEDs. The LT3492 works in buck, boost or buck-boost mode. The LT3492 uses a fixed frequency, current mode architecture resulting in stable operation over a wide range of supply and output voltages. A frequency adjust pin allows the user to program switching frequency between 330kHz and 2.1MHz to optimize efficiency and external component size. The external PWM input provides 3000:1 LED dimming on each channel. Each of the three channels has a built-in gate driver to drive an external LED-disconnect P-channel MOSFET, allowing high dimming range. The output current range of each channel of the LT3492 is programmed with an external sense resistor. The CTRL pin is used to adjust the LED current either for analogue dimming or over-temperature protection.

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Built-in gate driver for PMOS LED disconnect

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Open LED protection

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Surface mount components