ADP5520

NOT RECOMMENDED FOR NEW DESIGNS

Backlight Driver with I/O Expander

Data Sheet (Rev. B) Product Selection Table
Viewing:

Overview

  • Efficient asynchronous boost converter for driving up to 6 white LEDs
  • 2.7 V to 5.5 V input voltage range
  • 128 programmable backlight LED current levels (30 mA maximum)
  • Ambient light sensing with autonomous backlight adjustment
  • Programmable backlight fade-in/fade-out times
  • Programmable backlight dim and off times
  • 8 configurable GPIO pins (input, output, up to 4 × 4 keypad)
  • Up to 3 auxiliary LED current sinks (1 dedicated, 2 configurable)
  • 64 programmable auxiliary LED current levels (14 mA maximum)
  • Programmable auxiliary LED fade-in/fade-out times
  • Programmable auxiliary LED on and off times (allows blinking)
  • I2C-compatible serial interface
  • Interrupt line for signaling an external processor (INT)
  • Hard reset (RST)
  • Current limit protection
  • Thermal overload protection
  • Available in small 4.0 mm × 4.0 mm, 24-lead LFCSP package

The ADP5520 is a versatile single-chip, white LED backlight driver with a user configurable I/O expander. This device fits handset applications where the flip or slider section of the phone requires backlighting, I/O signaling and detecting, auxiliary LED lighting, and keypad functions. By incorporating an I2C-compatible serial interface and a single line interrupt, the ADP5520 significantly reduces the total number of lines required to interface with the baseband processor across the hinge flex.

The ADP5520 can detect ambient light levels and adjust the backlight brightness accordingly, resulting in extended battery operation.

Once configured, the ADP5520 is capable of controlling the flip/slider backlight intensity, on/off timing, dimming, and fading without the intervention of the main processor, which results in valuable battery power saving.

Applications

  • Display backlight driver for phones that require slider or flip keypad functions with single or multiple LED indicators
ADP5520
Backlight Driver with I/O Expander
ADP5520 Functional Block Diagram ADP5520 Pin Configuration
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project
Ask a Question

Documentation

Data Sheet 1

Evaluation Design File 1

Learn More
Add to myAnalog

Add media to the Resources section of myAnalog, to an existing project or to a new project.

Create New Project

Software Resources

Device Drivers 1

Hardware Ecosystem

Parts Product Life Cycle Description
ADP5586
PRODUCTION Keypad Decoder and I/O Port Expander
Modal heading
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project

Evaluation Kits

EVAL-ADP5520

ADP5520 Evaluation Board

Buy Now View Details

Product Details

The ADP5520 evaluation board allows the user to exercise the main features and functionality of the ADP5520 backlight driver with I/O expander IC. A daughterboard houses the actual IC and associated components for backlight driving. The daughter-board plugs into a larger motherboard that houses additional components for device configuration and stimulus. The evaluation board is powered via the USB port and is accompanied by a free register graphical user interface (GUI) that allows interaction with all internal settings of the ADP5520.
EVAL-ADP5520
ADP5520 Evaluation Board

Latest Discussions

2 Years Ago
Loading uClinux on bf527
7 Years Ago
Using ADP5520 for driving SHARP LCD backlight
View related discussion on EngineerZone®

Recently Viewed