VIN

LX

DIM

FS

PGND

IADJ

GND

VCC

* DAP connect to GND

GND

LM3414/14HV

Vin

GND

4.5V ± 42 VDC (LM3414)

PWM dimming signal

GND

GND

4.5V ± 65 VDC (LM3414HV)

LM3414, LM3414HV

www.ti.com

SNVS678E – JUNE 2010 – REVISED MAY 2013

1A 60W Common Anode Capable Constant Current Buck LED Driver Requires No

External Current Sensing Resistor

Check for Samples: LM3414, LM3414HV

1

FEATURES

DESCRIPTION

The LM3414 and LM3414HV are 1A 60W (see Note

2

•

Support LED Power up to 60W (see Note under

below) common anode capable constant current buck

Description): 18x 3W HBLEDs

LED drivers. They are exceptionally suitable to drive

•

Requires NO External Current Sensing

single string of 3W HBLED with up to 96% efficiency.

Resistor

They accept input voltages from 4.5VDC to 65VDC

and deliver up to 1A average LED current with ±3%

•

±3% LED Current Accuracy

accuracy. The integrated low-side N-channel power

•

Up to 96% Efficiency

MOSFET and current sensing element realize simple

•

High Contrast Ratio (Minimum Dimming

and

low

component

count

circuitry

as

no

Current Pulse Width <10 µS)

bootstrapping capacitor and external current sensing

resistor are required. An external small-signal resistor

•

Integrated Low-Side N-Channel MOSFET

to ground provides very fine LED current adjustment,

•

Adjustable Constant LED Current From 350mA

analog

dimming

as

well

as

thermal

fold-back

to 1000mA

functions.

•

Support Analog Dimming and Thermal Fold-

Constant switching frequency operation eases EMI.

Back

No external loop compensation network is needed.

•

Wide Input Voltage Range:

The proprietary Pulse-Level-Modulation (PLM) control

–

4.5V to 42V (LM3414)

method benefits in high conversion efficiency and true

average LED current regulation. Fast response time

–

4.5V to 65V (LM3414HV)

realizes fine LED current pulse fulfilling the 240 Hz

•

Constant Switching Frequency Adjustable

256-step dimming resolution requirement for general

from 250 kHz to 1000 kHz

lighting.

•

Thermal Shutdown Protection

The LM3414 and LM3414HV are available in SOIC-8

•

Power Enhanced SOIC-8 or 3mm x 3mm

and 3mm x 3mm WSON-8 packages.

WSON-8 Package

Note: Thermal de-rating applies according to actual

operation conditions

APPLICATIONS

•

High Power LED Driver

•

Architectural Lighting, Office Troffer

•

Automotive Lighting

•

MR-16 LED Lamp

Simplified Application Schematic

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2010–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.