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LM3533 - Complete Lighting-Power

Datasheet Summary

Description

The LM3533 is a complete power source for backlight, keypad, and indicator LEDs in smartphone handsets.

The high-voltage inductive boost converter provides the power for two series LED strings for display backlight and keypad functions (HVLED1 and HVLED2).

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.

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Datasheet preview – LM3533

Datasheet Details

Part number LM3533
Manufacturer Texas Instruments
File Size 1.76 MB
Description Complete Lighting-Power
Datasheet download datasheet LM3533 Datasheet
Additional preview pages of the LM3533 datasheet.

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Full PDF Text Transcription

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Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM3533 SNOSC68C – APRIL 2012 – REVISED SEPTEMBER 2015 LM3533 Complete Lighting Power Solution for Smartphone Handsets 1 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 Efficien
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