Texas Instruments LM3556
The LM3556 is a 4-MHz fixed-frequency synchronous boost converter plus 1.5-A constant current driver for a high-current white LED. The high-side current source allows for grounded cathode LED operation providing flash current up to 1.5 A. The LM3556 is controlled via an I2C-compatible interface.| Part No. | LM3556 |
|---|---|
| Datasheet | LM3556 Download |
| Manufacturer |  Texas Instruments |
| Description | 1.5-A Synchronous Boost LED Flash Driver |
| Buy | Stock & Price |
FEATURES
●1 Grounded Cathode LED Operation for Improved Thermal Management● 1.5-A High-Side Current Source for Single LED
● Accurate and Programmable LED Current from 46.9 mA to 1.5 A
● > 85% Efficiency in Torch Mode (at 100 mA) and Flash Mode (at 1 A to 1.5 A)
● Small Solution Size: < 20 mm2
● LED Thermal Sensing and Current Scale-Back
● Soft-Start Operation for Battery Protection
● Hardware Enable Pin
● Hardware Torch Enable
● Hardware Strobe Enable
● Synchronization Input for RF Power Amplifier Pulse Events
● VIN Flash Monitor Optimization
● 400-kHz I2C-Compatible Interface
● I2C-Compatible Programmable NTC Trip Point
● 0.4-mm Pitch, 16-Pin DSBGA Package 2
APPLICATIONS
Camera Phone LED Flash 3DESCRIPTION
An adaptive regulation method ensures the current source remains in regulation and maximizes efficiency.FEATURES
include: a hardware flash enable (STROBE) allowing a logic input to trigger the flash pulse, a hardware torch enable (TORCH) for Movie Mode or flashlight functions, a...
