LM2753

更新时间： 2024-11-06 22:51:55

品牌	Logo	应用领域
美国国家半导体 - NSC		驱动器转换器开关闪光灯
页数	文件大小	规格书
8页	520K
描述
High Power Switched Capacitor Voltage Convertor/Flash LED Driver

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LM2753 数据手册

February 2005

LM2753

High Power Switched Capacitor Voltage Convertor/Flash

LED Driver

General Description

Features

Input Voltage Range: 3.0V to 5.5V

Regulated 5V Output

The LM2753 is capable of driving a Flash LED with a pulsed

current of 400mA at an input voltage of 3.6V. A switched

capacitor doubler, the LM2753 provides a regulated 5V out-

put (V_OUT) over an input supply range of 3.0V to 5.5V. The

switched output, I_OUT, takes less than 10ns to turn on and

provide maximum current to a Flash LED. Flash LED current

is set via a ballast resistor. Continuous illumination current

(Torch Mode) is programmed by connecting a resistor be-

tween I_OUTand V_OUT. This device uses only three small,

low-cost ceramic capacitors.

250mA Output Current with a 3.6V input

400mA Pulsed Output Current (up to 500ms duration)

60µA (typ.) Quiescent Current

PFM Regulation

Inductor-less solution: requires only 3 small capacitors

1µA Typical Shutdown Current

10-pin LLP Package (No Pullback):

3mm x 3mm x 0.75mm

LM2753 uses Pulse Frequency Modulation (PFM) regula-

tion. Typical operating frequency is 725kHz. Under no-load

conditions, LM2753 operates on only 60µA. If the output is

connected to ground, the charge pump stays in the gain of 1

which helps limit the input current to 300mA (typ.)

Applications

n Cell Phone Camera Flash

n General Purpose Regulated Voltage Output, High

Current Supply

LM2753 is available in a 10-pin No Pullback Leadless Lead-

frame Package: LLP-10.

Typical Application Circuit

20140601

DS201406

www.national.com

12 3 4 5 6 7 8

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与LM2753相关器件

型号	品牌	获取价格	描述	数据表
LM2753SD	NSC	获取价格	High Power Switched Capacitor Voltage Convertor/Flash LED Driver
LM2753SD/NOPB	NSC	获取价格	IC LED DISPLAY DRIVER, DSO10, 3 X 3 MM, 0.80 MM HEIGHT, LLP-10, Display Driver
LM2753SD/NOPB	TI	获取价格	高功率开关电容器电压转换器/LED 闪光灯驱动器 \| DSC \| 10 \| -40 to
LM2753SDX	NSC	获取价格	High Power Switched Capacitor Voltage Convertor/Flash LED Driver
LM2753SDX/NOPB	TI	获取价格	高功率开关电容器电压转换器/LED 闪光灯驱动器 \| DSC \| 10 \| -40 to
LM2753SDX/NOPB	NSC	获取价格	IC LED DISPLAY DRIVER, DSO10, 3 X 3 MM, 0.80 MM HEIGHT, LLP-10, Display Driver
LM2754	NSC	获取价格	800mA Switched Capacitor Flash LED Driver with Time-Out Protection
LM2754	TI	获取价格	具有超时保护功能的 800mA 开关电容器 LED 闪光灯驱动器
LM2754SQ	NSC	获取价格	800mA Switched Capacitor Flash LED Driver with Time-Out Protection
LM2754SQ/NOPB	TI	获取价格	具有超时保护功能的 800mA 开关电容器 LED 闪光灯驱动器 \| RTW \| 24 \|