A8434

更新时间： 2024-01-21 07:41:00

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器泵
页数	文件大小	规格书
11页	446K
描述
6-Channel High Efficiency Charge Pump White LED Driver

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A8434 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
零件包装代码：	QFN	包装说明：	HVQCCN, LCC16,.12SQ,20
针数：	16	Reach Compliance Code：	compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.81	Is Samacsys：	N
数据输入模式：	SERIAL	接口集成电路类型：	LED DISPLAY DRIVER
JESD-30 代码：	S-XQCC-N16	JESD-609代码：	e3
长度：	3 mm	湿度敏感等级：	1
复用显示功能：	NO	功能数量：	1
区段数：	6	端子数量：	16
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	UNSPECIFIED	封装代码：	HVQCCN
封装等效代码：	LCC16,.12SQ,20	封装形状：	SQUARE
封装形式：	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	峰值回流温度（摄氏度）：	260
电源：	3.6 V	认证状态：	Not Qualified
座面最大高度：	0.8 mm	子类别：	Display Drivers
最大供电电压：	5.5 V	最小供电电压：	2.7 V
标称供电电压：	3.6 V	表面贴装：	YES
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	NO LEAD	端子节距：	0.5 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	40
宽度：	3 mm	Base Number Matches：	1

A8434 数据手册

A8434

6-Channel High Efficiency Charge Pump White LED Driver

Features and Benefits

Description

▪ Proprietary adaptive control scheme (1×, 1.5×, 2×)

▪ 0.5% typical WLED current matching

▪ Drives up to 6 white LEDs

The A8434 high efficiency charge pump ICs offer a simple,

low-cost WLED (white LED) driver solution for driving up to

sixWLEDs in various application configurations, either all six

backlighting a single display, or for multiple displays, such as

four WLEDs as the main display backlight, with the other two

WLEDs used for backlighting a sub display or a low-current

flash/torch. Using a proprietary control scheme (1×, 1.5×, and

2×), theA8434 can deliver well-matchedWLED current while

maintaining the highest efficiency and low EMI.

▫ Main display backlight (up to 6 WLEDs)

▫ Main display and sub display backlight

▫ Main display and low-current flash/torch

▪ 30 mA per WLED

▪ 2× serial dimming interfaces

▪ 320 mA charge pump capability

▪ Low EMI design and soft start function

▪ Short circuit, overvoltage, thermal shutdown protection

▪ 0.75 mm nominal height (very thin profile),

3×3 mm footprint packages

The WLED current is regulated over the entire range of Li+

batteryvoltagetoprovideuniformintensity.WLEDbrightness

and on/off can be controlled for the main display and sub

display/torch through 2 single-wire serial interface pins.

The A8434 is available in an QFN/MLP-16 space-conserving

(3×3 mm footprint) ES package.

Package: 16 pin QFN/MLP (suffix ES)

Applications include:

▪ White LED backlights for cellular phones, PDAs

▪ Digital cameras, camcorders

▪ Portable audio devices and MP3s

▪ Other portable device white LED backlighting

Approximate scale 1:1

Typical Applications

COUT

1 µF

BATT

2.7 to 5.5 V

VIN

VOUT

LED1

LED2

VIN

VOUT

LED1

LED2

CIN

1 μF

CIN

1 µF

C1+

C1–

C2+

C2–

ISET

ENM

ENS

C1+

C1–

C2+

1 µF

A8434

1 µF

LED3

LED4

LED5

LED6

LED3

LED4

LED5

LED6

C2–

ISET

RSET

COUT

1 µF

BATT

On/Off and

Dimming

Control

ENM

ENS

2.7 to 5.5 V

VIN

VOUT

LED1

LED2

On/Off and

GND

Dimming

Control

CIN

1 µF

C1+

C1–

C2+

C2–

ISET

ENM

ENS

_IN>V_f(max)+0.2V, V_f= LED forward drop

1 µF

Figure 1.6×30 mA WLED display

Figure 3. High efficiency current sink

A8434

1 µF

LED3

LED4

LED5

LED6

RSET

On/Off and

Dimming

Control

GND

D1-D4 Main Display; D5-D6 Sub Display

Figure 2. 4×30 mA main with 2×30 mA sub display

8434-DS, Rev. 1

12 3 4 5 6 7...11

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