LM3533
Description
The LM3533 is a plete power source for backlight, keypad, and indicator LEDs in smartphone handsets.
Key Features
- 1 Drives Two Parallel High-Voltage LED Strings for Display and Keypad Lighting
- High-Voltage Strings Capable of up to 40-V Output Voltage and up to 90% Efficiency
- Up to 30 mA per Current Sink (Both Backlight and Indicator)
- 14-Bit Equivalent Exponential Dimming With 8-Bit Programmable Backlight Code
- Selectable Analog ALS Input with 128 Programmable Gain-Setting Resistors or PWM ALS Input With Internal Low-Pass Filter
- PWM Input for Content Adjustable Brightness Control
- Five Low-Voltage Current Sinks for Indicator LEDs
- Integrated Charge Pump for Improved Efficiency and VIN Operating Range
- Internal Pattern Generation Engine
- Fully Configurable LED Grouping and Control
