Electronic component search and free download site.
Transistors,MosFET ,Diode,Integrated circuits
Home >>> TI >>> LM3554 Datasheet

LM3554 Datasheet

Part NameDescriptionManufacturer
LM3554 Synchronous Boost Converter With 1.2-A Dual High-Side LED Drivers and I2C Compatible Interface TI
Texas Instruments TI
Other PDF  not available.
LM3554 image

The LM3554 is a 2-MHz fixed-frequency, current mode synchronous boost converter. The device is designed to operate as a dual 600-mA (1.2 A total) constant-current driver for high-current white LEDs, or as a regulated 4.5-V or 5-V voltage source.
The main features include: an I2C-compatible interface for controlling the LED current or the desired output voltage, a hardware flash enable input for direct triggering of the flash pulse, and dual TX inputs which force the flash pulse into a low-current torch mode allowing for synchronization to RF power amplifier events or other high-current conditions. Additionally, an active high hardware enable (HWEN) input provides a hardware shutdown during system software failures.
Five protection features are available within the LM3554 including a software selectable input voltage monitor, an internal comparator for interfacing with an external temperature sensor, four selectable current limits to ensure the battery current is kept below a predetermined peak level, an overvoltage protection feature to limit the output voltage during LED open circuits, and an output short circuit protection which limits the output current during shorts to GND.

• Input Voltage: 2.5 V to 5.5 V
• Programmable 4.5-V or 5-V Constant Output
• Dual High-Side Current Sources
• Grounded Cathode Allowing for Better Heat
   Sinking and LED Routing
• > 90% Efficiency
• Ultra-Small Solution Size: < 23 mm2
• Four Operating Modes: Torch, Flash, LED
   Indicator, and Voltage Output
• Accurate and Programmable LED Current from
   37.5 mA to 1.2 A
• Hardware Flash and Torch Enable
• LED Thermal Sensing and Current Scaleback
• Software Selectable Input Voltage Monitor
• Programmable Flash Timeout
• Dual Synchronization Inputs for RF Power
   Amplifier Pulse Events
• Open and Short LED Detection
• Active High Hardware Enable for Protection
   Against System Faults
• 400-kHz I2C-Compatible Interface

• Camera Phone LED Flash Controller
• Class D Audio Amplifier Power
• LED Current Source Biasing

Page Links : 1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37  38  39  40  41  42  43  44  45  46  47 

Other manufacturer searches related to LM3554

Part NameDescriptionPDFManufacturer
ADP1655 Dual LED Flash Driver with I2C-Compatible Interface View Analog Devices
LM3553 1.2A Dual Flash LED Driver System with I2C Compatible Interface View National ->Texas Instruments
TPS65800EVM TPS658xxEVM Integrated Single-Cell, Lithium-Ion Battery- and Power-Management IC With I2C, LED Drives, Two Synchronous Buck, Boost, and Multiple LDOs View Texas Instruments
SC622A LED Light Management Unit Charge Pump, 400mA Flash LED, Dual LDOs, and I2C Interface View Semtech Corporation
DAC081C081 8-Bit Micro Power Digital-to-Analog Converter with an I2C-Compatible Interface View National ->Texas Instruments
LTC3453 Synchronous Buck-Boost High Power White LED Driver View Linear Technology
LM3532 High-Efficiency White LED Driver With Programmable Ambient Light Sensing Capability and I2C-Compatible Interface View Texas Instruments
FAN5343 6-LED Series Boost LED Driver with Integrated Schottky Diode and Single-Wire Digital Interface View Fairchild Semiconductor
SC4505 High Efficiency Boost Converter for Backlight/Flash LED Driver View Semtech Corporation
S11059-01WT I2C interface-compatible color sensor View Hamamatsu Photonics

Share Link : 
All Rights Reserved© datasheetq.com 2015 - 2019  ] [ Privacy Policy ] [ Request Datasheet  ] [ Contact Us ]