A8430EEK

更新时间： 2024-01-11 06:56:22

品牌	Logo	应用领域
急速微 - ALLEGRO		转换器驱动升压转换器
页数	文件大小	规格书
10页	328K
描述
White LED Driver Constant Current Step-up Converter

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技术参数
数据手册

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A8430EEK 技术参数

生命周期：	Obsolete	Reach Compliance Code：	unknown
风险等级：	5.84	特性阻抗：	50 Ω
最大输入功率 (CW)：	43.98 dBm	最大工作频率：	4000 MHz
最小工作频率：		最高工作温度：	125 °C
最低工作温度：	-55 °C	射频/微波设备类型：	FIXED ATTENUATOR
最大电压驻波比：	1.35	Base Number Matches：	1

A8430EEK 数据手册

A8430

White LED Driver Constant Current Step-up Converter

The A8430 is a noninverting boost converter that steps-up the input

voltage, to provide a programmable constant current output at up to

36 V for driving white LEDs in series. Driving LEDs in series ensures

A8430 MLPD

identical currents and uniform brightness. Up to four white LEDs can

be driven at 20 mA from a single cell Li-ion or a multicell NiMH power

source. Up to seven white LEDs can be driven by increasing the supply

voltage up to 10 V.

The A8430 incorporates a power switch and feedback sense amplifier

to provide a solution with minimum external components. The output

current can be set by adjusting a single external sense resistor and can

Approximate actual size

be varied with a voltage or filtered PWM signal when dimming control

is required. The high switching frequency of 1.2 MHz allows the use of

small inductor and capacitor values.

The A8430 is provided in a 5-pin 3 mm x 3 mm MLP package (part

number suffix EK), that has a nominal height of only 0.75 mm. The

lead-free version (part number suffix EK-T) has 100% lead-free matte

tin leadframe plating.

VIN

GND

FEATURES

Same pad footprint as SOT-23-5

ꢀ

Output voltage up to 36 V

_θJA= 50 °C/W, see note 1, page 2

2.5 V to 10 V input

Drives up to 4 LEDs at 20 mA from a 2.5 V supply

Drives up to 5 LEDs at 20 mA from a 3 V supply

1.2 MHz switching frequency

300 mA switch current limit

1 µA shutdown current

ABSOLUTE MAXIMUM RATINGS

SW Pin ................................................–0.3 V to 36 V

Remaining Pins.................................. –0.3 V to 10 V

Ambient Operating Temperature, T_A....... –40°C to 85°C

Junction Temperature, T_J(max)...............................150°C

Storage Temperature, T_S.................... –55°C to 150°C

APPLICATIONS

ꢀ

LED backlights

Portable battery-powered equipment

Cellular phones

PDAs (Personal Digital Assistant)

Camcorders, personal stereos, MP3 players, cameras

ꢀ

Mobile GPS systems

Use the following complete part number when ordering:

Part Number

A8430EEK

Package

Description

Surface Mount

5-pin, MLPD

A8430EEK-T

Lead-Free, Surface Mount

12 3 4 5 6 7...10

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与A8430EEK相关器件

型号	品牌	描述	获取价格	数据表
A8430EEK-T	ALLEGRO	White LED Driver Constant Current Step-up Converter	获取价格
A8430EEKTR	ALLEGRO	LED Driver, 1-Segment, 3 X 3 MM, 0.75 MM HEIGHT, MLP-5	获取价格
A8430EEKTR-T	ALLEGRO	LED Driver, 1-Segment, 3 X 3 MM, 0.75 MM HEIGHT, ROHS COMPLIANT, MLP-5	获取价格
A8430EK	ALLEGRO	LED Driver, 1-Segment, PDSO5, SOT-23, 5 PIN	获取价格
A8431	ALLEGRO	White LED Driver Constant Current Step-up Converter	获取价格
A8431EEH-T	ALLEGRO	White LED Driver Constant Current Step-up Converter	获取价格