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LM3503SQ-16 데이터시트(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
부품명 LM3503SQ-16
상세설명  Dual-Display Constant Current LED Driver with Analog Brightness Control
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홈페이지  http://www.national.com
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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
Backlighting
n >
80% Peak Efficiency
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: <1 mm Height
— 10 Bump MicroSMD
— 16 Pin LLP
Applications
n
Dual-Display Display Backlighting in Portable devices
n
Cellular Phones and PDAs
Typical Application
20128662
July 2005
© 2005 National Semiconductor Corporation
DS201286
www.national.com


유사한 부품 번호 - LM3503SQ-16

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