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LM3414MR Scheda tecnica(PDF) 1 Page - Texas Instruments

Il numero della parte LM3414MR
Spiegazioni elettronici  1A 60W Common Anode Capable Constant Current Buck LED Driver Requires No
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Homepage  http://www.ti.com
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LM3414MR Scheda tecnica(HTML) 1 Page - Texas Instruments

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VIN
LX
DIM
FS
PGND
IADJ
GND
VCC
* DAP connect to GND
D1
L1
GND
Iout = 1A
LM3414/14HV
RFS
RIADJ
Vin
GND
4.5V ± 42 VDC (LM3414)
CIN
PWM dimming signal
CVCC
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.


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