Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

LM3405 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LM3405
Description  550kHz/1.6MHz 1A Constant Current Buck Regulator for Powering LEDs
Download  2 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM3405 Datasheet(HTML) 1 Page - National Semiconductor (TI)

  LM3405 Datasheet HTML 1Page - National Semiconductor (TI) LM3405 Datasheet HTML 2Page - National Semiconductor (TI)  
Zoom Inzoom in Zoom Outzoom out
 1 / 2 page
background image
LM3405
550kHz/1.6MHz 1A Constant Current Buck Regulator for
Powering LEDs
General Description
Integrated with a 1A power switch, the LM3405 is a current
mode control switching buck regulator designed to provide a
simple, high efficiency solution for driving LEDs. With a 0.2V
reference voltage feedback control to minimize power dissi-
pation, an external resistor sets the current as needed for
driving various types of LEDs. Switching frequency is inter-
nally set to 550kHz (LM3405-Y) or 1.6MHz (LM3405-X),
allowing small surface mount inductors and capacitors to be
used. The LM3405 utilizes current mode control and internal
compensation offering ease of use and predictable, high
performance regulation over a wide range of operating con-
ditions. Additional features include user accessible enable/
dim pin for enabling and PWM dimming of LEDs, thermal
shutdown, current limit and over voltage protection.
Features
n
Thin SOT23-6 package
n
4.0V to 20V input voltage range
n
550kHz (LM3405Y) and 1.6MHz (LM3405X)
switching frequencies
n
300m
Ω NMOS switch
n
30nA shutdown current
n
Enable/DIM input for enabling and PWM dimming of
LEDs
n
Requires only low value, ceramic capacitors
n
Input voltage UVLO
n
Internally compensated current mode control
n
Thermal shutdown
Applications
n
LED Driver
n
Constant Current Source
Typical Application Circuit
20178901
Connection Diagrams
20178905
6-Lead TSOT
NS Package Number MK06A
20178960
Pin 1 Indentification
ADVANCE INFORMATION
October 2006
© 2006 National Semiconductor Corporation
DS201789
www.national.com


Html Pages

1  2 


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn