ADP5520:  Backlight Driver with I/O Expander

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 ...More

ADP5520:  Backlight Driver with I/O Expander

Product Description

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.

Features

  • 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)
  • See data sheet for additional features

Diagrams

ADP5520 Functional Block Diagram
ADP5520 Functional Block Diagram

Specifications

Product Description Backlight Driver with I/O Expander
Input Voltage Range (Vcc) 2.27 to 5.5 V
LED # 6

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Part# Input Voltage Range (Vcc) Vout Adjust Options Iout (max) (mA) Switching Frequency (MHz) Package Price* (1000-4999)
ADM8843 2.6 to 5.5V - 20 1.5 16-LFCSP $0.50
ADM8845 2.6 to 5.5V - 30 - 16-LFCSP $0.71
ADP1610 2.5 to 5.5 V Vin to 12 V 1.2 1.2 8-MSOP $1.12
ADP1611 2.5 to 5.5 V Vin to 20 V 1.2 1.2 8-MSOP -
ADP1653 2.75 to 5.5 V - 500 1.2 16-LFCSP $1.45
ADP1655 2.75 to 5.5 V - 500 2 12-WLCSP $0.95
ADP5520 2.27 to 5.5 V - 30 1 - $1.66

* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

Pricing, Packaging & Availability

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For detailed drawings and chemical composition please consult our  Package Site

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Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

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This is the acceptable operating range of the device. The various ranges specified are as follows:
  • Commercial: 0 to +70 degrees Celsius
  • Military : -55 to +125 degrees Celsius
  • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
  • Automotive: -40 to +125 degrees Celsius
Price
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

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Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.

*The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

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