DC484A: 12mA @ 13V Max, 2.7 ~ 5V in, Boost

Summary

DC484A features the LT1937 constantcurrent white LED driver in a small SOT23 ThinSOT package. The demo board is designed to demonstrate the high efficiency performance and the small size of the LT1937.

The LT1937 features a 95mV feedback voltage, 1.2MHz switching frequency and a special internal compensation network, which allows small (0603) input and output capacitors. LT1937 offers numerous LED dimming circuit options for a wide range of control options.

DC484 is specifically designed for white LED backlight applications using 2–4 LEDs, making LT1937-SOT23 an ideal solution for battery powered portable applications such as cellular phones, digital cameras, MP3 players, GPS receivers, and handheld computers (PDAs).

Specifications

Manufacturer Analog Devices Inc.
Category Lighting
Sub-Category LED Drivers - DC In
Eval Board Part Number DC484A-ND
Eval Board Supplier Analog Devices Inc.
Eval Board Normally In Stock
Voltage In 2.7 ~ 5 V
Topology Step Up
Current Out 12 mA
Voltage Out (Max) 13 V
Outputs and Type 1 Non-Isolated
Efficiency @ Conditions >82%, 3V in, 10 ~ 20 mA
>82%, 3.6V in, 10 ~ 20 mA
Features Current Limit (Adj. or Fixed)
Dimming Control
Open Circuit Protection
PWM Interface
Shutdown, Enable, Standby
Soft Start
Switching Frequency 1.2 MHz
Component Count + Extras 15 + 7
Design Author Linear Technology
Application / Target Market Audio: MP3 Players
Cell Phones
Digital Cameras
Flashlight / Torch
GPS
Portable Devices
Main I.C. Base Part LT1937
Date Created By Author 2001-12
Date Added To Library 2019-03

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