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LM3414HVSD View Datasheet(PDF) - National ->Texas Instruments

Part NameDescriptionManufacturer
LM3414HVSD 1A 60W* Common Anode Capable Constant Current Buck LED Driver Requires No External Current Sensing Resistor National-Semiconductor
National ->Texas Instruments National-Semiconductor
LM3414HVSD Datasheet PDF : 20 Pages
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August 9, 2010
1A 60W* Common Anode Capable Constant Current Buck
LED Driver Requires No External Current Sensing Resistor
General Description
The LM3414 and LM3414HV are 1A 60W* common anode
capable constant current buck LED drivers. They are excep-
tionally suitable to drive single string of 3W HBLED with up to
96% efficiency. They accept input voltages from 4.5VDC to
65VDC and deliver up to 1A average LED current with ±3%
accuracy. The integrated low-side N-channel power MOSFET
and current sensing element realize simple and low compo-
nent count circuitry as no bootstrapping capacitor and exter-
nal current sensing resistor are required. An external small-
signal resistor to ground provides very fine LED current
adjustment, analog dimming as well as thermal fold-back
Constant switching frequency operation eases EMI. No ex-
ternal loop compensation network is needed. The proprietary
Pulse-Level-Modulation (PLM) control method benefits in
high conversion efficiency and true average LED current reg-
ulation. Fast response time realizes fine LED current pulse
fulfilling the 240 Hz 256-step dimming resolution requirement
for general lighting.
The LM3414 and LM3414HV are available in ePSOP-8 and
3mm x 3mm LLP-8 packages.
*Thermal de-rating applies according to actual operation con-
Support LED power up to 60W*: 18x 3W HBLEDs
Requires NO external current sensing resistor
±3% LED current accuracy
Up to 96% efficiency
High contrast ratio (Minimum dimming current pulse width
<10 µS)
Integrated low-side N-channel MOSFET
Adjustable Constant LED current from 350mA to 1000mA
Support analog dimming and thermal fold-back
Wide input voltage range:
4.5V to 42V (LM3414)
4.5V to 65V (LM3414HV)
Constant Switching Frequency adjustable from 250 kHz to
1000 kHz
Thermal shutdown protection
Power enhanced ePSOP-8 or 3mm x 3mm LLP-8 package
High Power LED Driver
Architectural Lighting, Office Troffer
Automotive Lighting
MR-16 LED Lamp
Simplified Application Schematic
© 2010 National Semiconductor Corporation 301248
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