The LT3492 is a 60V triple output LED driver for high input and/or high output voltage backlighting or direct lighting applications. A single 4mm × 5mm IC can drive a large number of LEDs, reducing overall solution cost when compared to less capable drivers. A built-in gate driver for a disconnect PMOS in series with the LED string, along with other techniques, enables a 3000:1 PWM dimming ratio. When coupled with the part’s analog dim- ming functions, the overall dimming ratio can be as high as 30,000:1. The LT3492 can be configured into buck- mode, boost-mode or buck-boost mode, depending on the available in- put voltage source and the number and configuration of LEDs to be driven.
The document introduces the LT3492 as a 60V triple output LED driver designed for high input and/or high output voltage backlighting or direct lighting applications. It features a built-in gate driver for a disconnect PMOS in series with the LED string, enabling a PWM dimming ratio of up to 3000:1.
| Input Voltage Rating | 60V |
|---|---|
| Output Channels | Triple Output |
| PWM Dimming Ratio | 3000:1 |
| Operating Modes | Buck, Boost, Buck-Boost |
The LT3492 has a rated switch capability of 60V.
Each output can support up to 14 LEDs when used in boost mode.
The overall dimming ratio can be as high as 30,000:1 when analog dimming is used.