The LT3965 is a LED bypass switching device that enables independent dimming and diagnostics of eight individual LEDs or LED segments.

The LT3965 works in conjunction with an LED driver circuit configured as a current source, and features eight individually-controlled floating 17V/330mΩ NMOS switches. Using these internal power switches and an integrated I2C serial interface, individual LEDs within the string can be turned on or off, or they can be PWM dimmed to offer unique patterns within the LED matrix.
Typical applications include automotive matrix LED headlights, industrial lighting and large LED display lighting.

The I2C serial interface enables digital programming with 256:1 dimming ratios with or without the 11-bit resolution fade transition between the dimming states. Each switch can control and monitor a single LED or a segment.
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