Datasheet > AIC1647CVBG

AIC1647CVBG

更新时间： 2024-02-01 15:44:25

品牌	Logo	应用领域
沛亨 - AIC		转换器
页数	文件大小	规格书
11页	400K
描述
WHITE LED STEP-UP CONVERTER IN SOT23

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中文翻译

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技术参数
数据手册

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AIC1647CVBG 技术参数

是否Rohs认证：	符合	生命周期：	Contact Manufacturer
包装说明：	TSOP, TSOP5/6,.11,37	Reach Compliance Code：	compliant
风险等级：	5.77	控制模式：	CURRENT-MODE
JESD-30 代码：	R-PDSO-G5	端子数量：	5
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	TSOP
封装等效代码：	TSOP5/6,.11,37	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, THIN PROFILE	认证状态：	Not Qualified
子类别：	Switching Regulator or Controllers	表面贴装：	YES
最大切换频率：	1600 kHz	技术：	CMOS
温度等级：	INDUSTRIAL	端子形式：	GULL WING
端子节距：	0.95 mm	端子位置：	DUAL
Base Number Matches：	1

AIC1647CVBG 数据手册

AIC1647

White LED Step-Up Converter in SOT23

ꢀFEATURES

ꢀDESCRIPTION

AIC1647 is a fixed frequency step-up DC/DC

converter designed to drive white LEDs with a

constant current to provide backlight in hand-

held devices. Series connection of the LEDs

provides identical LED currents resulting in

uniform brightness. This configuration eliminates

the need for ballast resistors. Low 95mV

feedback voltage minimizes power loss in the

current setting resistor for better efficiency.

1.2MHz Fixed Frequency Current-Mode PWM

Operation.

ꢁ

Efficiency Up to 84% at V_IN=4.2V, 3LEDs,

ꢁ

I_LED=20mA

Drives Up to 6LEDs in series

Low Supply Current: 70µA

Matches LED Current

ꢁ

Require Tiny Inductors and Capacitors

Tiny SOT23-5 Package

AIC1647 is a step-up PWM converter, which

includes an internal N-channel MOSFET switch

for high efficiency. The high switching frequency,

1.2MHz, allows the use of tiny external

components, saves the layout space and cost.

ꢀAPPLICATIONS

Cellular Phones

ꢁ

PDAs

ꢁ

Digital Still Cameras

ꢁ

Handheld Devices

ꢁ

AIC1647 is available in a space-saving, 5-lead

SOT-23-5 package.

White LED Display Backlighting

ꢁ

TYPICAL APPLICATION CIRCUIT

ꢀ

3.3~4.2V

=4.2V

6.8µH

1µF

VIN

BZV55-B12

=3.6V

SHDN

GND

=3.0V

11.8V~12.2V

20mA

AIC1647

3 LEDs, 6.8 H

L1: 976AS-6R8M, TOKO

D1: RB521S-30, ROHM

L1: 976AS-6R8M, TOKO

D1: RB521S-30, ROHM

C1: JMK107BJ105KA, TAIYO YUDEN

C2: EMK212BJ105KA, TAIYO YUDEN

4.7Ω

LED Current (mA)

Fig. 1 Li-Ion Powered Driver with Over Voltage Protection for Three White LEDs

Analog Integrations Corporation

Si-Soft Research Center

DS-1647P-03 010405

3A1, No.1, Li-Hsin Rd. I, Science Park, Hsinchu 300, Taiwan, R.O.C.

TEL: 886-3-5772500

FAX: 886-3-5772510

www.analog.com.tw

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