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ADP8861:  Charge Pump, 7-Channel Smart LED Driver with I2C Interface

Product Details

Product Status:Recommended for New Designs

The ADP8861 provides a powerful charge pump driver with independent control of up to seven LEDs. Six of these LEDs can be independently driven up to 30 mA (typical). A seventh LED can be driven to 60 mA (typical). All LEDs are programmable 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.

Driving this entire configuration 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 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.

The ADP8861 is available in a compact lead frame chip scale package (LFCSP).

FEATURES and BENEFITS

  • Charge pump with automatic gain selection of 1x, 1.5x, and 2x 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
  • Small lead frame chip scale package (LFCSP)

Typical Operating Circuit

Of Note ...

If purchasing the ADP8861DBCP-EVALZ, please make sure you also purchase the ADP886XMB1-EVALZ
MB and eval board are both required!

Documentation

Title Content Type File Type
ADP8861: Charge Pump, 7-Channel Smart LED Driver with I2C Interface Data Sheet (Rev B, 04/2012) (pdf, 695 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
UG-005: Software User Guide  (pdf, 471 kB)
Describes the functionality of the ADP8860 LED driver and provides software development guidelines. The ADP8860 communicates with an external processor using an I2C interface and an interrupt line (nINT). The processor sends initialization and activation commands to the ADP8860, which acts as a slave device.
User Guides PDF
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
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADP8860 Back-light LED Linux Driver (Wiki Site) Device Drivers HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

ADP8861 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADP8861ACBZ-R7 Status: Production CHIPS W/SOLDER BUMPS/WLSCP 20 Ind Reel, 3000 - $1.22 Y  Material Info PCN Purchase Sample
ADP8861ACPZ-R7 Status: Production 20 Ball WLCSP (2.5x2.0 mm) 20 Ind Reel, 1500 - $1.53 Y  Material Info PCN Purchase Sample
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.

ADP8861 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADP8861DBCB-EVALZ Status: Production Evaluation Board $170.00 Yes -

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.

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