Features
• Automotive qualified
• Constant current operation
• Current LED settable by external sensing
resistor and adjustable via SPI
• Converter switching frequency adjustable by
external resistor (RSF)
• EMC reduction by internal spread spectrum
dither oscillator
• Low frequency PWM dimming operation.
• Maximum input current limiter
• Maximum switching duty cycle limiter
• Slope compensation adjustable by external
resistor (R9)
• Battery overvoltage shut down protection (ext.
R3, R4 resistors required)
• Led chain OV detection (ext. R5, R6)
• Multiplexed output for monitoring and control of
LED temperature (external NTC resistor
required), voltage of LED chain, and low
frequency PWM
• SPI communication serial interface transceiver
(SDI, SDO, SCK, CSN)
• Regulated output for micro supply 5 V ± 2 %
-20 mA
• Parameter programming and settings of
internal memory registers by the dedicated SPI
interface:
– LED current reference adjusting (± 66.7 %)
– Maximum input current limiter reference
adjusting (± 55.5 %)
– Random dither frequency sweeping,
modulation frequency and deviation
percentage
• Power on reset pin output
• ESD protection