(PDF) LM3405 Datasheet PDF | etcTI





LM3405 Datasheet PDF

Part Number LM3405
Description 1.6-MHz 1-A Constant Current Buck LED Driver
Manufacture etcTI
Total Page 30 Pages
PDF Download Download LM3405 Datasheet PDF

Features: Datasheet pdf Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM3405 SNVS429C – OCTOBER 2006 – REVISED DECEMBER 2016 LM3405 1 .6-MHz, 1-A Constant Current Buck Regul ator For Powering LEDS 1 Features •1 VIN Operating Range of 3 V to 15 V • Drives up to 5 High-Brightness LEDs in Series at 1A • Thin SOT-6 Package 1.6-MHz Switching Frequency • EN/DI M Input for Enabling and PWM Dimming of LEDs • 300-mΩ NMOS Switch • 40-n A Shutdown Current at VIN = 5 V • Int ernally Compensated Current-mode Contro l • Cycle-by-Cycle Current Limit • Input Voltage UVLO • Overcurrent Prot ection • Thermal Shutdown 2 Applicati ons • LED Drivers • Constant Curren t Sources • Industrial Lighting • L ED Flashlights Typical Application Circ uit D2 3 Description The LM3405 is a 1 -A constant current buck LED driver des igned to provide a simple, high efficie ncy solution for driving high power LED s. With a 0.205-V reference voltage feedback control to minimize power dissipation, an external resis.

Keywords: LM3405, datasheet, pdf, etcTI, 1.6-MHz, 1-A, Constant, Current, Buck, LED, Driver, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute, Equivalent

LM3405 datasheet
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
LM3405
SNVS429C – OCTOBER 2006 – REVISED DECEMBER 2016
LM3405 1.6-MHz, 1-A Constant Current Buck Regulator For Powering LEDS
1 Features
1 VIN Operating Range of 3 V to 15 V
• Drives up to 5 High-Brightness LEDs in Series at
1A
• Thin SOT-6 Package
• 1.6-MHz Switching Frequency
• EN/DIM Input for Enabling and PWM Dimming of
LEDs
• 300-mNMOS Switch
• 40-nA Shutdown Current at VIN = 5 V
• Internally Compensated Current-mode Control
• Cycle-by-Cycle Current Limit
• Input Voltage UVLO
• Overcurrent Protection
• Thermal Shutdown
2 Applications
• LED Drivers
• Constant Current Sources
• Industrial Lighting
• LED Flashlights
Typical Application Circuit
D2
3 Description
The LM3405 is a 1-A constant current buck LED
driver designed to provide a simple, high efficiency
solution for driving high power LEDs. With a 0.205-V
reference voltage feedback control to minimize power
dissipation, an external resistor sets the current as
required for driving various types of LEDs. Switching
frequency is internally set to 1.6 MHz, allowing small
surface mount inductors and capacitors to be used.
The LM3405 uses current-mode control and internal
compensation offering ease of use and predictable,
high performance regulation over a wide range of
operating conditions. With a maximum input voltage
of 15 V, the device can drive up to 3 High-Brightness
LEDs in series at 1-A forward current, with the single
LED forward voltage of approximately 3.7 V.
Additional features include user accessible EN/DIM
pin for enabling and PWM dimming of LEDs, thermal
shutdown, cycle-by-cycle current limit and overcurrent
protection.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM3405
SOT (6)
2.90 mm × 1.60 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Efficiency vs LED Current (VIN = 5 V)
VIN
C1
ON
OFF
VIN BOOST
C3
LM3405
EN/DIM
SW
D1
GND
FB
L1 VOUT
C2 C4
IF
R1
Copyright © 2016, Texas Instruments Incorporated
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

LM3405 datasheet
LM3405
SNVS429C – OCTOBER 2006 – REVISED DECEMBER 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ..................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 5
6.5 Electrical Characteristics........................................... 5
6.6 Typical Characteristics .............................................. 6
7 Detailed Description .............................................. 8
7.1 Overview ................................................................... 8
7.2 Functional Block Diagram ......................................... 9
7.3 Feature Description................................................... 9
7.4 Device Functional Modes........................................ 14
8 Application and Implementation ........................ 15
8.1 Application Information............................................ 15
8.2 Typical Applications ................................................ 19
8.3 System Examples ................................................... 21
9 Power Supply Recommendations...................... 24
10 Layout................................................................... 24
10.1 Layout Guidelines ................................................. 24
10.2 Layout Example .................................................... 24
11 Device and Documentation Support ................. 25
11.1 Documentation Support ........................................ 25
11.2 Receiving Notification of Documentation Updates 25
11.3 Community Resource............................................ 25
11.4 Trademarks ........................................................... 25
11.5 Electrostatic Discharge Caution ............................ 25
11.6 Glossary ................................................................ 25
12 Mechanical, Packaging, and Orderable
Information ........................................................... 25
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (April 2013) to Revision C
Page
• Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section ................................................................................................. 1
• Deleted Soldering information (220°C, maximum) from Absolute Maximum Ratings............................................................ 4
• Changed Thermal resistance, θJA, in Thermal Information From: 118°C/W To: 182.9°C/W .................................................. 5
Changes from Revision A (May 2013) to Revision B
Page
• Changed layout of National Semiconductor Data Sheet to TI format .................................................................................. 23
2 Submit Documentation Feedback
Product Folder Links: LM3405
Copyright © 2006–2016, Texas Instruments Incorporated




Index : 0  1  2  3   4  5  6  7   8  9  A  B   C  D  E  F   G  H  I  J   K  L  M  N   O  P  Q  R   S  T  U  V   W  X  Y  Z
@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)