AAT2848IDG-T1 Datasheet

IC型號：
AAT2848IDG-T1
PDF描述：
High-Current Charge Pump For Backlight Display and Flash App...
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芯片廠家：
ANALOGICTECH

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PRODUCT DATASHEET

AAT2848

ChargePump

High-Current Charge Pump For Backlight Display and Flash Applications

Features

鈥?/div>

Tri-Mode (1x/1.5x/2x) Charge Pump

Four 30mA Backlight LED Channels

Independent S

Cwire Control for Backlight

32-Level Programmable Backlight Current Control鈥?/div>

Linear, Inverting

Two 300mA Flash LED Channels

Independent S

Cwire Control for Flash

16-Level Programmable Flash Current Control鈥?/div>

Linear, Inverting

User-Programmable Full Scale Current for Backlight

and Flash

User-Programmable Fade-In/Fade-Out Function for

Backlight

User-Programmable Safety Timer for Flash LED

Protection

Built-In Thermal Protection

Automatic Soft-Start

-40擄C to +85擄C Temperature Range

Available in TQFN33-20 Package

General Description

The AAT2848 is a tri-mode charge pump optimized for

systems operating with lithium-ion/polymer batteries. The

charge pump provides power for both white LED backlight

and flash, with an integrated four channel backlight LED

current sink plus two channel flash LED current sinks.

Each backlight channel can drive up to 30mA, while each

flash current sink/channel can drive up to 300mA (600mA

total). Two independent S

Cwire鈩?(AnalogicTech鈥檚 Simple

Serial Control鈩? serial digital interface inputs enable,

disable, and set LED current to one of 32 levels for the

backlight and to one of 16 levels for the flash, with full-

scale current independently set for backlight and flash

using external resistors.

The AAT2848 offers a built-in fade-in/out function for

linear control of the backlight current during ON/OFF

transitions. The fade time is programmable by an exter-

nal capacitor.

The AAT2848 also offers a built-in flash timeout function

as a safety feature associated with the high power flash

driver. The safety timer is also programmable via an

external capacitor.

The AAT2848 is equipped with built-in short-circuit and

over-temperature protection. The soft-start circuitry pre-

vents excessive inrush current at start-up and mode

transitions. The AAT2848 is available in a Pb-free, space

saving TQFN33-20 package and operates over the -40擄C

to +85擄C ambient temperature range.

Applications

鈥?Camera Enabled Mobile Devices

鈥?Digital Still Cameras

鈥?Multimedia Mobile Phones

Typical Application

1渭F

C2+

OUT

2.2渭F

Flash LEDs

Lumileds PWF1

or equivalent

WLEDs

OSRAM LW M673

or equivalent

C1- C1+ C2-

BAT

4.7渭F

AAT2848

BL1

BL2

BL3

BL4

FL1

FL2

Cwire

Backlight Control

Cwire

Flash Control

BENS

FENS

BSET

FSET

BSET

15k

FSET

14.3k

FLTMR

330nF

FADE

47nF

AGND

PGND

2848.2008.05.1.0

www.analogictech.com

現(xiàn)有數(shù)量
1,500現(xiàn)貨
價格
1 : ￥11.61000剪切帶（CT）1,500 : ￥4.76803卷帶（TR）
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