Overview

Features and Benefits

  • Charge pump with automatic gain selection of 1×, 1.5×, and 2× for maximum efficiency 
  • 7 independent, programmable LED drivers 
    • 7 drivers capable of 30 mA (typical) 
    • 1 driver also capable of 60 mA (typical) 
  • Programmable maximum current limit (128 levels) 
  • Standby mode for <1 μA current consumption 
  • 16 programmable fade in and fade out times 
    • 0.1 sec to 5.5 sec 
    • Choose from linear, square, or cubic rates 
  • Fading override 
  • I2C-compatible interface for all programming 
  • Dedicated reset pin and built-in power-on reset (POR) 
  • Short-circuit, overvoltage, and overtemperature protection 
  • Internal soft start to limit inrush currents 
  • Input-to-output isolation during faults or shutdown 
  • Operation down to VIN = 2.5 V with undervoltage lockout (UVLO) at VIN = 2.0 V 
  • Available in a small 20-ball, 2.15 mm × 2.36 mm × 0.6 mm WLCSP or a 20-lead, 4 mm × 4 mm × 0.75 mm LFCSP

Product Details

The ADP8861 provides a powerful charge pump driver with independent control of up to seven LEDs. These seven LEDs can be independently driven up to 30 mA (typical). The seventh LED can also be driven to 60 mA (typical). All LEDs are pro-grammable for maximum current and fade in/out times via the I2C interface. These LEDs can also be combined into groups to reduce the processor instructions during fade in/out.

This entire configuration is driven by a two-capacitor charge pump with gains of 1×, 1.5×, and 2×. The charge pump is capable of driving a maximum IOUT of 240 mA from a supply of 2.5 V to 5.5 V. A full suite of safety features, including short-circuit, overvoltage, and overtemperature protection, allows easy implementation of a safe and robust design. Additionally, input inrush currents are limited via an integrated soft start combined with controlled input-to-output isolation.

Applications

  • Mobile display backlighting
  • Mobile phone keypad backlighting
  • Dual RGB backlighting
  • LED indication
  • General backlighting of small format displays

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Software & Systems Requirements

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

PCN-PDN Information

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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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Evaluation Boards Pricing displayed is based on 1-piece.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.