(PDF) LM3402 Datasheet PDF | etcTI





LM3402 Datasheet PDF

Part Number LM3402
Description 0.5-A Constant Current Buck Regulator
Manufacture etcTI
Total Page 30 Pages
PDF Download Download LM3402 Datasheet PDF

Features: Datasheet pdf Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM3402, LM3402HV SNVS450F SEPTEMBER 2006 – REVISED OCTOBER 20 15 LM3402/HV 0.5-A Constant Current Buc k Regulator for Driving High Power LEDs 1 Features •1 Integrated 0.5-A N-ch annel MOSFET • VIN Range from 6 V to 42 V (LM3402) • VIN Range from 6 V to 75 V (LM3402HV) • 500 mA Output Curr ent Over Temperature • Cycle-by-Cycle Current Limit • No Control Loop Comp ensation Required • Separate PWM Dimm ing and Low Power Shutdown • Supports All Ceramic-Output Capacitors and Capa citor-Less Outputs • Thermal Shutdown Protection • VSSOP, SO PowerPAD™ P ackages 2 Applications • LED Drivers • Constant Current Source • Automot ive Lighting • General Illumination Industrial Lighting 3 Description T he LM3402/HV are monolithic switching r egulators designed to deliver constant currents to high power LEDs. Ideal for automotive, industrial, and general lighting applications, they contain a high-side Nchannel MOSFET.

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LM3402 datasheet
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
LM3402, LM3402HV
SNVS450F – SEPTEMBER 2006 – REVISED OCTOBER 2015
LM3402/HV 0.5-A Constant Current Buck Regulator for Driving High Power LEDs
1 Features
1 Integrated 0.5-A N-channel MOSFET
• VIN Range from 6 V to 42 V (LM3402)
• VIN Range from 6 V to 75 V (LM3402HV)
• 500 mA Output Current Over Temperature
• Cycle-by-Cycle Current Limit
• No Control Loop Compensation Required
• Separate PWM Dimming and Low Power
Shutdown
• Supports All Ceramic-Output Capacitors and
Capacitor-Less Outputs
• Thermal Shutdown Protection
• VSSOP, SO PowerPAD™ Packages
2 Applications
• LED Drivers
• Constant Current Source
• Automotive Lighting
• General Illumination
• Industrial Lighting
3 Description
The LM3402/HV are monolithic switching regulators
designed to deliver constant currents to high power
LEDs. Ideal for automotive, industrial, and general
lighting applications, they contain a high-side N-
channel MOSFET switch with a current limit of 735
mA (typical) for step-down (Buck) regulators.
Hysteretic control with controlled ON-time coupled
with an external resistor allow the converter output
voltage to adjust as needed to deliver a constant
current to series and series - parallel connected
arrays of LEDs of varying number and type, LED
dimming by pulse width modulation (PWM),
broken/open LED protection, low-power shutdown
and thermal shutdown complete the feature set.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM3402/HV
VSSOP (8)
HSOP (8)
3.00 mm × 3.00 mm
4.89 mm × 3.90 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Diagram
CB
VIN L1
VIN BOOT SW
CIN RON
RON
LM3402/02HV
D1
IF
CS
DIM
GND
VCC
RSNS
CF
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.

LM3402 datasheet
LM3402, LM3402HV
SNVS450F – SEPTEMBER 2006 – REVISED OCTOBER 2015
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 Timing Requirements ................................................ 6
6.7 Typical Characteristics .............................................. 7
7 Detailed Description ............................................ 10
7.1 Overview ................................................................. 10
7.2 Functional Block Diagram ....................................... 10
7.3 Feature Description................................................. 10
7.4 Device Functional Modes........................................ 13
8 Application and Implementation ........................ 15
8.1 Application Information............................................ 15
8.2 Typical Application .................................................. 23
9 Power Supply Recommendations...................... 29
10 Layout................................................................... 29
10.1 Layout Guidelines ................................................. 29
10.2 Layout Example .................................................... 30
11 Device and Documentation Support ................. 31
11.1 Device Support...................................................... 31
11.2 Related Links ........................................................ 31
11.3 Community Resources.......................................... 31
11.4 Trademarks ........................................................... 31
11.5 Electrostatic Discharge Caution ............................ 31
11.6 Glossary ................................................................ 31
12 Mechanical, Packaging, and Orderable
Information ........................................................... 31
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision E (April 2013) to Revision F
Page
• Added ESD Ratings and Timing Requirements tables, 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
Changes from Revision D (May 2013) to Revision E
Page
• Changed layout of National Data Sheet to TI format ............................................................................................................. 1
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