ADD5203
FEATURES
White LED driver based on inductive boost converter Integrated 50 V MOSFET with 2.9 A peak current limit Input voltage range: 6 V to 21 V Maximum output adjustable up to 45 V 350 k Hz to 1 MHz adjustable operating frequency Overvoltage protection (OVP) up to typical 47.5 V Built-in soft start for boost converter Drives up to eight LED current strings LED current adjustable up to 30 m A for each channel Headroom control to maximize efficiency Adjustable dimming frequency: 200 Hz to 10 k Hz LED open and short fault protection Selectable dimming control interface methods PWM input SMBus serial input Selectable dimming modes Fixed delay PWM dimming control with 8-bit resolution No delay PWM dimming control with 8-bit resolution Direct PWM dimming control DC current dimming control with 8-bit resolution General Thermal shutdown Undervoltage lockout 28-lead, 4 mm × 4 mm × 0.75 mm LFCSP_WQ
FUNCTIONAL BLOCK DIAGRAM
STEP-UP SWITCHING REGULATOR
EIGHT CURRENT SOURCES
PWM DUTY EXTRACTOR...
