LED

LM3503 Datasheet – Display Constant Current LED Driver

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Part Number: LM3503

Function: Dual-Display Constant Current LED Driver with Analog Brightness Control

Package: MicroSMD 10 Pin, SQA16 Pin Type

Manufacturer: Texas Instruments

Pinouts:

LM3503 datasheet

 

Description

The LM3503 is a white LED driver for lighting applications. For dual display backlighting applications, the LM3503 provides a complete solution. The LM3503 contains two internal white LEDcurrent 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.

Features

• Drives up to 4, 6, 8 or 10 White LEDs for Dual Display Backlighting
• >80% Peak Efficiency
• Output Voltage Protection Options: 16V, 25V,35V & 44V
• Input Under-Voltage Protection
• Internal Soft Start Eliminates Inrush Current
• 1 MHz Constant Switching Frequency
• Analog Brightness Control
• Wide Input Voltage Range: 2.5V to 5.5V
• Low Profile Packages: <1 mm Height
– 10 Bump DSBGA
– 16 Pin WQFN

Other data sheets are available within the file:

LM3503ITL-16/NOPB, LM3503ITL-25/NOPB, LM3503ITL-35/NOPB, LM3503ITL-44/NOPB

LM3503 Datasheet PDF Download


LM3503 pdf

SGL8022W Datasheet – 1 channel DC LED control touch chip

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Part Number: SGL8022W, SGL8022

Function: Single-channel DC LED control touch chip

Manufacturer: SiGma Micro

Image

SGL8022W LED control touch chip

Description

SGL8022W is a single-channel touch chip for LED lightness regulation.

This chip can control the on-off state of LED light and regulate its lightness on a continuous range, which could be used on incandescent and halogen.

Pinouts:
SGL8022W Pinout image SGL8022
Features

A touch operation through TI corresponds to the output of SO, which could control lightness of LED. Four functional optionsare available, which are determined by input state of OPT1 and OPT2 before electrified:

(1)  OPT1=1, OPT2=1: regulate lightness discretely without lightness-memory.

(2)  OPT1=0, OPT2=1: regulate lightness continuously without lightness-memory.

(3)  OPT1=1, OPT2=0: regulate lightness continuously with lightness-memory.

(4)  OPT1=0, OPT2=0: regulate lightness on a three-sections mode.

 

Applications Circuit

SGL8022W Datasheet, Application Circuit

SGL8022W Datasheet PDF

SGL8022W pdf

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