描述 Description

The LX2260 is a high brightness multi-channel LED driver, designed for automotive display illumination. It offers the designer a high degree of flexibility to accommodate different LED configurations (white or RGB), drive currents, input and output voltages while providing a high degree of control, protection and fault management of the system.The LX2260 is very well suited for applications where high brightness LED backlighting is combined with a wide dimming range and high reliability such as in Automotive Infotainment, Marine or Cockpit applications.The LX2260 driver supports up to 4 independent LED strings and can be integrated in systems supporting up to 40W. The drive current of each string can be programmed up to 500mA, with a typical channel-to-channel matching accuracy within ±1.5 percent. The FETs of the boost converter and each LED current sink are external to provide the flexibility and scalability to accommodate a variety of LED configurations as well as to provide optimal thermal management of the system.Dimming inputs providing either independent control of several white LED strings or color mixing capability for optimal light temperature control. PWM frequency of up to 25kHz is supported to avoid audible noise.The LX2260 has the unique capability to automatically adjust its operation according to the instantaneous input and output voltage requirements to operate in a boost, buck-boost, or buck converter mode (this is not a traditional buck/boost circuit) thus automatically maintaining the optimally chosen LED current regulation.Fault conditions can be reported through a digital 2 wires serial bus interface (I2C and SMBus compatible) and include LED short, LED open, and IC over temperature indicators as well as information about the LED string voltage.