LM3503SQ-44 National Semiconductor, LM3503SQ-44 Datasheet

LM3503SQ-44

Manufacturer Part Number

LM3503SQ-44

Description

Manufacturer

National Semiconductor

Datasheets

1.LM3503SQ-44.pdf (20 pages)

2.LM3503SQ-44.pdf (20 pages)

3.LM3503SQ-44.pdf (20 pages)

Specifications of LM3503SQ-44

Case

LLP-16

Date_code

2005+

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM3503SQ-44/NOPB

Manufacturer:

Quantity:

1 225

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Download datasheet (592Kb)

LM3503

Dual-Display Constant Current LED Driver with Analog

Brightness Control

General Description

The LM3503 is a white LED driver for lighting applications.

For dual display backlighting applications, the LM3503 pro-

vides a complete solution. The LM3503 contains two internal

white LED current bypass FET (Field Effect Transistor)

switches. The white LED current can be adjusted with a DC

voltage from a digital to analog converter or RC filtered PWM

(pulse-width-modulated) signal at the Cntrl pin.

With no external compensation, cycle-by-cycle current limit,

output over-voltage protection, input under-voltage protec-

tion, and dynamic white LED current control capability, the

LM3503 offers superior performance over other step-up

white LED drivers.

Features

n Drives up to 4, 6, 8 or 10 White LEDs for Dual Display

Typical Application

Backlighting

DS201286

n Output Voltage Protection Options: 16V, 25V, 35V & 44V

n Input Under-Voltage Protection

n Internal Soft Start Eliminates Inrush Current

n 1 MHz Constant-Switching Frequency

n Analog Brightness Control

n Wide Input Voltage Range: 2.5V to 5.5V

n Low Profile Packages:

Applications

n Dual-Display Display Backlighting in Portable devices

n Cellular Phones and PDAs

— 10 Bump MicroSMD

— 16 Pin LLP

80% Peak Efficiency

1 mm Height

20128662

www.national.com

July 2005

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