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ADP8866:  Charge Pump Driven 9-Channel LED Driver with Automated LED Lighting Effects

Product Details

Product Status:Recommended for New Designs

The ADP8866 combines a programmable backlight LED charge pump driver with automatic blinking functions. Nine LED drivers can be independently programmed at currents up to 25 mA. The current level, fade time, and blinking rate can be programmed once and executed autonomously on a loop. Separate fade in and out times can be set for the backlight LEDs.

Driving all of this is a two capacitor charge pump with gains of 1×, 1.5×, and 2×. This setup 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 over-temperature protection allow 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.

FEATURES and BENEFITS

  • Charge pump with automatic gain selection of 1x, 1.5x, and 2x for maximum efficiency.
  • 92% peak efficiency
  • 9 independent and programmable LED drivers
  • Each driver capable of 25 mA (full scale)
  • Each driver has 7 bits (128 levels) of non-linear current settings
  • Standby mode for <1 μA current consumption
  • 16 programmable fade in and fade out times (0.0 sec to 1.75 sec) with choice of square or cubic rates
  • Automated and customizable LED blinking for all 9 channels.
  • Unique heartbeat mode for customizable double pulse lighting effects
  • PWM input for implementing content adjustable brightness control (CABC)
  • 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
  • Operates down to VIN = 2.5 V, with undervoltage lockout (UVLO) at 2.0 V
  • Small lead frame chip scale package (LFCSP)

Typical Application Circuit

Documentation

Title Content Type File Type
ADP8866: Charge Pump Driven 9-Channel LED Driver with Automated LED Lighting Effects Data Sheet (Rev A, 01/2014) (pdf, 894 kB) Data Sheets PDF
Isolating Power in Communication Bus and Gate Drive Applications
Starting with a communications application overview of small power options through the process of selecting the right power products this webcast is a great resource for your communications applications designs.
Webcasts WEBCAST
Low-Voltage Current Sink Controls High-Voltage LED String  (pdf)
Discusses how a single programmable LED driver can be combined with a low-cost boost converter to achieve a flexible, high-efficiency, easy-to-program solution.
Analog Dialogue PDF
Activate Cell Phone Indicator LEDs While Preserving Standby Time  (pdf)
Discusses how cell phone manufacturers can provide status LEDs that can alert users to messages waiting, impending calendar appointments, and other notifications while the phone is in standby and keeping total standby consumption low.
Analog Dialogue PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

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Price, packaging, availability

Price Table Help

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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