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LM3429 Datasheet

N-Channel Controller

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LM3429, LM3429-Q1
SNVS616H – APRIL 2009 – REVISED JULY 2015
LM3429/-Q1 N-Channel Controller for Constant Current LED Drivers
1 Features
1 LM3429-Q1 is AEC-Q100 Grade 1 Qualified for
Automotive Applications
• VIN Range From 4.5 V to 75 V
• Adjustable Current Sense Voltage
• High-Side Current Sensing
• 2-, 1-A Peak MosFET Gate Driver
• Input Undervoltage Protection
• Overvoltage Protection
• PWM Dimming
• Analog Dimming
• Cycle-by-Cycle Current Limit
• Programmable Switching Frequency
• Low Profile 14-lead HTSSOP Package
• Thermal Shutdown
2 Applications
• LED Drivers - Buck, Boost, Buck-Boost, SEPIC
• Indoor and Outdoor SSL
• Automotive
• General Illumination
• Constant-Current Regulators
3 Description
The LM3429 is a versatile high voltage N-channel
MosFET controller for LED drivers. It can be easily
configured in buck, boost, buck-boost and SEPIC
topologies. This flexibility, along with an input voltage
rating of 75V, makes the LM3429 ideal for
illuminating LEDs in a very diverse, large family of
applications.
Adjustable high-side current sense voltage allows for
tight regulation of the LED current with the highest
efficiency possible. The LM3429 uses Predictive Off-
time (PRO) control, which is a combination of peak
current-mode control and a predictive off-timer. This
method of control eases the design of loop
compensation while providing inherent input voltage
feed-forward compensation.
The LM3429 includes a high-voltage startup regulator
that operates over a wide input range of 4.5 V to 75
V. The internal PWM controller is designed for
adjustable switching frequencies of up to 2 MHz, thus
enabling compact solutions. Additional features
include analog dimming, PWM dimming, overvoltage
protection, undervoltage lock-out, cycle-by-cycle
current limit, and thermal shutdown.
Device Information(1)
PART NUMBER PACKAGE
BODY SIZE (NOM)
LM3429
LM3429-Q1
HTSSOP (14)
5.00 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Boost Application Circuit
VIN
1 VIN
LM3429
14
HSN
2
COMP
13
HSP
3
CSH
4
RCT
12
IS
11
VCC
ILED
5
AGND
10
GATE
6
OVP
PWM
7
nDIM
DAP
9
PGND
8
NC
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.




etcTI

LM3429 Datasheet Preview

LM3429 Datasheet

N-Channel Controller

No Preview Available !

LM3429, LM3429-Q1
SNVS616H – APRIL 2009 – REVISED JULY 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 Typical Characteristics ............................................. 7
7 Detailed Description .............................................. 9
7.1 Overview ................................................................... 9
7.2 Functional Block Diagram ......................................... 9
7.3 Feature Description................................................. 10
7.4 Device Functional Modes........................................ 21
8 Application and Implementation ........................ 22
8.1 Application Information............................................ 22
8.2 Typical Applications ................................................ 24
9 Power Supply Recommendations...................... 53
9.1 Input Supply Current Limit ...................................... 53
10 Layout................................................................... 53
10.1 Layout Guidelines ................................................. 53
10.2 Layout Example .................................................... 54
11 Device and Documentation Support ................. 55
11.1 Device Support...................................................... 55
11.2 Documentation Support ........................................ 55
11.3 Related Links ........................................................ 55
11.4 Community Resources.......................................... 55
11.5 Trademarks ........................................................... 55
11.6 Electrostatic Discharge Caution ............................ 56
11.7 Glossary ................................................................ 56
12 Mechanical, Packaging, and Orderable
Information ........................................................... 56
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision G (April 2013) to Revision H
Page
• Added Pin Configuration and Functions section, Handling Rating 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
Changes from Revision F (May 2013) to Revision G
Page
• Changed layout of National Data Sheet to TI format ........................................................................................................... 51
• Changed layout of National Data Sheet to TI format ........................................................................................................... 52
2 Submit Documentation Feedback
Copyright © 2009–2015, Texas Instruments Incorporated
Product Folder Links: LM3429 LM3429-Q1


Part Number LM3429
Description N-Channel Controller
Maker etcTI
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