LX1801ILQ

I/O Controller Interface IC Analog to Digital Interface Controller

The LX1801 is a SMBus controlled dimming interface for CCFL inverters. It complies with the Dell Inc. M07 specification for Notebook backlight inverters. The LX1801 processes 3 brightness control inputs, one each from the SMBus, an ambient light sensor, and a separate system side PWM signal and generates an analog output signal that drives the dimming circuitry of a CCFL inverter controller. Five different brightness control modes are supported which include Intel DPST display power saving technology. In addition to its SMBus interface, the LX1801 contains an eight bit ADC, seven 8 bit registers, three 8 bit DAC’s, a multiplier, and other special circuits that process its analog voltage output. The LX1801 controls inverter on/off and monitors and reports lamp status and inverter faults in real time. The LX1801 is available in the 16 lead 3 x 3mm MLPQ package.

**Features** 

.

Fully Compliant to Standard SMBus Specifications

.

I2C Bus Compatible

.

8 bit Resolution

.

±10 LSB Accuracy

.

One 8 bit ADC

.

Three 8 bit DAC’s

.

SMBus Address Strap for 2 Selectable Addresses

.

External Reference Inputs Set Analog Brightness Voltage Lower Limit and Range when used in a CCFL backlight application

The LX1801 is available in the 16 lead 3x3mm MLPQ QFN package.