SM8122A

更新时间： 2024-11-25 03:31:39

品牌	Logo	应用领域
NPC		驱动
页数	文件大小	规格书
13页	162K
描述
White LED Driver IC

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中文翻译

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SM8122A 数据手册

SM8122A

White LED Driver IC

OVERVIEW

The SM8122A is a high efﬁciency step-up DC/DC converter. Due to high voltage CMOS process realizing

25V output supply as maximum value, 2 to 6 lights of white LED connected in series can be lighted. By con-

necting in series, current variation among LED is eliminated. Current value sent to white LED can be set by

external resistors. In addition, brightness can also be adjusted by control to FB pin or CE pin. Since the

SM8122A has an over voltage protection circuit built-in, it dispenses with the existing external ZD (zener

diode). Besides, the switching frequency of the SM8122A is higher (2.0MHz) than the existing product

(SM8121A), so that it can respond to lower inductance value.

FEATURES

PINOUT

^ꢀBoost-up control using PWM

(Top view)

^ꢀ2 to 6 lights of white LED (connected in series)

lighted

^ꢀSOT23-6W

^ꢀOutput current value can be set by external resis-

tors (51Ω: 9.8mA, 33Ω: 15.2mA, 24Ω: 20.8mA)

^ꢀBrightness adjustable by control to FB pin or CE

^ꢀCurrent variation among LED decreased by high

precision

VDD

VSS

VOUT

^ꢀHigh efﬁcient drive by step-up model

^ꢀOver voltage protection circuit built-in

^ꢀSupply voltage range: 2.3 to 5.5V

^ꢀMaximum output voltage: 25V

^ꢀQuiescent current: 820µA (typ)

^ꢀStandby current: 1.0µA (max)

^ꢀR

(Switching MOS-Tr): 2Ω (typ)

^ꢀMSON-6

^ꢀSwitching frequency: 2.0MHz (typ)

^ꢀOutput current detection accuracy: 2%

^ꢀPackage: SOT23-6W (SM8122AH)

MSON-6 (SM8122AD)

VDD

VOUT

VSS

APPLICATIONS

^ꢀCellular phone

^ꢀPager

ꢀ Digital still camera

^ꢀHandy terminal

^ꢀPDAs

ꢀ Portable games

^ꢀWhite LED drive

^ꢀLCD bias supply

ꢀ Flash memory supply

ORDERING INFORMATION

Device

Package

SOT23-6W

MSON-6

SM8122AH

SM8122AD

NIPPON PRECISION CIRCUITS INC.—1

12 3 4 5 6 7...13

中文翻译

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与SM8122A相关器件

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