ADP8866 [ADI]

Charge Pump Driven 9-Channel LED Driver with Automated LED Lighting Effects; 电荷泵驱动9通道LED驱动器，具有自动LED灯光效果


型号：	ADP8866
厂家：	ADI
描述：	Charge Pump Driven 9-Channel LED Driver with Automated LED Lighting Effects 电荷泵驱动9通道LED驱动器，具有自动LED灯光效果驱动器泵
文件：	总2页 (文件大小：77K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Charge Pump Driven 9-Channel LED Driver with

Automated LED Lighting Effects

Preliminary Technical Data

ADP8866

FEATURES

APPLICATIONS

Charge pump with automatic gain selection of 1×, 1.5×, and

2× 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

Mobile display backlighting

Mobile phone keypad backlighting

LED indication and status lights

Automated LED blinking

TYPICAL OPERATING CIRCUIT

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 V_IN= 2.5 V, with undervoltage lockout

(UVLO) at 2.0 V

Figure 1.

Small lead frame chip scale package (LFCSP)

GENERAL DESCRIPTION

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

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.

_OUTof 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.

Rev. PrA

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rightsof third parties that may result fromits use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks andregisteredtrademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

ADP8866

Preliminary Technical Data

OUTLINE DIMENSIONS

4.10

4.00 SQ

3.90

0.30

0.25

0.20

PIN 1

INDICATOR

PIN 1

INDICATOR

0.50

BSC

EXPOSED

PAD

2.65

2.50 SQ

2.35

0.50

0.40

0.30

0.25 MIN

TOP VIEW

BOTTOM VIEW

FOR PROPER CONNECTION OF

THE EXPOSED PAD, REFER TO

THE PIN CONFIGURATION AND

FUNCTION DESCRIPTIONS

0.80

0.75

0.70

0.05 MAX

0.02 NOM

COPLANARITY

0.08

SECTION OF THIS DATA SHEET.

SEATING

PLANE

0.20 REF

COMPLIANT TO JEDEC STANDARDS MO-220-WGGD.

Figure 2. 20 Lead Lead Frame Chip Scale Package [LFCSP_WQ]

4 mm × 4 mm Body, Very Very Thin Quad

(CP-20-10)

Dimensions shown in millimeters

ORDERING GUIDE

Model¹

Temperature Range

Package Description

Package Option

ADP8866ACPZ-R7

−40°C to +105°C

20-Lead LFCSP_WQ, Tape and Reel

CP-20-10

¹Z = RoHS Compliant Part.

Figure 3. Tape and Reel Orientation for LFCSP Units

registered trademarks are the property of their respective owners.

PR09478-0-12/10(PrA)

Rev. PrA | Page 2 of 2

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