Texas Instruments LM3535
The LM3535 device is a highly integrated LED driver capable of driving 8 LEDs in parallel for large display applications. The LED driver current sinks are split into three independently controlled groups. The primary group can be configured to drive up to six LEDs for use in the main phone display.FEATURES
●1 Drives Up to 8 LEDs Each With Up to 25 mA of Diode Current● External PWM Input for Dynamic Backlight Control
● Multi-Zone Ambient Light Sensing (ALS)
● ALS Interrupt Reporting
● Independent On/Off Control for All Current Sinks
● 128 Exponential Dimming Steps With 600:1 Dimming Ratio for Group A (Up to 6 LEDs)
● 8 Linear Dimming States for Groups B (Up to 3 LEDs) and D1C (1 LED)
● Programmable Auto-Dimming Function
● Up to 90% Efficiency
● 0.55% Accurate Current Matching
● Wide Input Voltage Range (2.7 V to 5.5 V)
● Active High Hardware Enable
● Total Solution Size < 16 mm2
● Low Profile 20-Pin DSBGA Package 2
APPLICATIONS
● Smart-Phone LED Backlighting● Large Format LCD Backlighting
● General LED Lighting 3
DESCRIPTION
Independent LED control allows selection of a subset of the 6 main display LEDs for partial-illumination applications. In addition to the main bank of 6, the LM3535 is capable of driving an additional 2 independently controlled LEDs to support Indicator applications.