Datasheet > AAT2860IMK-5-T1

AAT2860IMK-5-T1

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
ANALOGICTECH		驱动器
页数	文件大小	规格书
23页	2894K
描述
Backlight/Flash LED Driver and Multiple LDO Lighting Management Unit

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AAT2860IMK-5-T1 数据手册

PRODUCT DATASHEET

AAT2860

ChargePump

Backlight/Flash LED Driver and Multiple LDO Lighting Management Unit

General Description

Features

•

The AAT2860-x is a highly integrated charge pump-based

lighting management unit (LMU) with three low dropout

(LDO) regulators optimized for single-cell lithium-ion/

polymer systems. The charge pump provides power for

all LED outputs; multiple backlight and flash LED configu-

rations are available. The backlight LED outputs can be

programmed up to 31mA each and the flash LED outputs

can be programmed up to 300mA each. An I²C compati-

ble serial digital interface is used to enable, disable, and

set the current to one of 32 levels for the backlight and

one of 16 levels for the flash. A programmable safety

timer and flash control input is included for easy flash

control. Backlight current matching is better than 3% for

uniform display brightness, and flash current matching is

better than 5% for uniform power dissipation.

Input Voltage Range: 2.7V to 5.5V

I²C Compatible Serial Interface

Tri-Mode Charge Pump

Drives up to Seven LEDs (Backlight/Flash)

Programmable Backlight Current Settings

▪

•

32 Levels - 0.5mA to 31mA

Programmable Flash Current

▪

16 Levels – OFF to 300mA

1MHz Switching Frequency

Automatic Soft-Start

▪

•

Three Low Dropout Regulators

300mA Output Current

150mV Dropout

Programmable Output from 1.5V to 3.0V

Output Auto-Discharge for Fast Shutdown

▪

•

Built-In Thermal Protection

-40°C to +85°C Temperature Range

TQFN34-24 Package

The AAT2860-x offers three high-performance low-noise

MicroPower™ LDO linear regulators. The regulators are

enabled and their output voltages are set through the

I²C compatible serial interface. Each LDO can supply up

to 300mA load current and ground-pin current is only

80µA making the AAT2860-x ideal for battery-operated

applications.

Applications

•

Camera Enabled Mobile Devices

Digital Still Cameras

Multimedia Mobile Phones

The AAT2860-x is available in a Pb-free, space saving

TQFN34-24 package and operates over the -40°C to

+85°C ambient temperature range.

Typical Application

1µF

WLEDs

OSRAM LW M673

or equivalent

C1+ C1- C2+ C2-

V_OUT

OUT

Flash LEDs

Lumiled LXCL-PWF1

or equivalent

V_BAT

3.6V

C_IN

4.7µF

C_OUT

2.2µF

AAT2860-x

BL1

C_IN

4.7µF

BL2

LED Select

LED_SEL

BL3

BL4

BL5

FL_LVL

SDA

Flash Level Select

BL6/FL1

BL7/FL2

SDA

I²C Serial

Interface

V_LDOA

at 300mA

LDOA

SCL

C_LDOA

2.2µF

V_LDOB

at 300mA

LDOB

LDO Select

LDO_SEL

C_LDOB

2.2µF

V_LDOC

LDOC

PGND

at 300mA

AGND

C_LDOC

2.2µF

w w w . a n a l o g i c t e c h . c o m

2860.2008.05.1.0

12 3 4 5 6 7...23

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