Datasheet > A8181

A8181

更新时间： 2024-01-09 22:11:05

品牌	Logo	应用领域
创瑞 - AITSEMI		驱动
页数	文件大小	规格书
20页	502K
描述
HIGH BRIGHTNESS LED DRIVER WITH INTERNAL SWITCH

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中文翻译

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A8181 数据手册

A8181

AiT Semiconductor Inc.

www.ait-ic.com

36V, 1.2A LED STEP-DOWN

HIGH BRIGHTNESS LED DRIVER WITH INTERNAL SWITCH

DESCRIPTION

FEATURES



Simple low parts count

Internal 36V NDMOS switch

Up to 1.2A output current

Single pin on/off and brightness control using

DC voltage or PWM

Soft Start

High efficiency (up to 97%)

Wide input voltage range: 6V to 36V

Output shutdown

Up to 1MHz switching frequency

Inherent open-circuit LED protection

Typical 3% output current accuracy

High-side current sense

Hysteretic control: no compensation

Adjustable constant LED current

Over temperature protection

Available in SOT-25 package

The A8181 is a continuous mode inductive step-down

converter, designed for driving single or multiple

series connected LEDs efficiently from a voltage

source higher than the LED voltage. The device

operates from an input supply between 6V and 36V

and provides an externally output current up to 1.2A.

Depending upon supply voltage and external

components, this can provides up to 24 watts of

output power.



The A8181 includes the output switch and a high-side

output current sensing circuit, which uses an external

resistor to set the nominal average output current.

APPLICATIONS

Output current can be adjusted by applying an

external control signal to the 'ADJ' pin. The ADJ pin

will accept either a DC voltage or a PWM waveform.

During DC dimming, this will provide a continuous

output current that is proportional to the external

applied DC voltage. During the PWM dimming, this

will provide a gated output current and the average

current is proportional to the duty cycle. Applying a

voltage of 0.2V or lower to the ADJ pin turns the

output off and switches the device into a low current

standby state.



Low voltage halogen replacement LEDs

Automotive lighting

Low voltage industrial lighting

LED back-up lighting

Illuminated signs

LCD TV backlighting

TYPICAL APPLICATION

The A8181 is available in SOT-25 Packages.

ORDERING INFORMATION

Package Type

SOT-25

Part Number

A8181E5R

A8181E5VR

V: Green Package

R : Tape & Reel

Note

AiT provides all Pb free products

Suffix ꢀ V ꢀ means Green Package

REV1.0

- APR 2011 RELEASED -

- 1 -

12 3 4 5 6 7...20

中文翻译

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与A8181相关器件

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A8181E5R	AITSEMI	获取价格	HIGH BRIGHTNESS LED DRIVER WITH INTERNAL SWITCH
A8181E5VR	AITSEMI	获取价格	HIGH BRIGHTNESS LED DRIVER WITH INTERNAL SWITCH
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A8181SLB_SERIES	ETC	获取价格
A8182SL	ALLEGRO	获取价格	LOW-DROPOUT, 3 V REGULATOR . HIGH EFFICIENCY
A8183SLU	SANKEN	获取价格	Surface-Mount, Low Quiescent Current, Low Dropout Voltage Dropper Type
A8183SLU	ALLEGRO	获取价格	LOW-DROPOUT, 3 V REGULATOR . HIGH EFFICIENCY
A8184SLT	SANKEN	获取价格	Surface-Mount, Low Quiescent Current, Low Dropout Voltage Dropper Type
A8184SLT	ALLEGRO	获取价格	LOW-DROPOUT, 3 V REGULATOR . HIGH EFFICIENCY