ADVANCE DATASHEET
LND060
OFFLINE LED DRIVER (Up to 277VAC)
NO INDUCTORS, FILTERs, PF>0.9, THD<25%
GENERAL DESCRIPTION
The LND060 is designed to drive one or more strings of
LEDs directly from an offline AC source. Using a Linear
Dimensions proprietary (PATENTS PENDING) switch
array, LED strings can be segmented with a combination
of series and parallel LED combinations and re-
combinations. The result is an extremely high efficiency
solution with low total harmonic distortion (THD<25%) and
high power factor (>0.9).
As the LND060 connects directly to the AC line and re-
configures the LEDs to match the input voltage, it does
not require magnetics, capacitors or filtering components
as standard LED driver solutions do. This direct coupling
is also very efficient.
The use of a proprietary switch array allows a large
number of segments and re-arrangement in serial and
parallel combinations. This overcomes the flicker, fanout,
LED utilization, low THD & poor power factor of first
generation offline direct drive schemes.
The LND060 is compatible with standard phase control
TRIAC dimmers.
One percent (1%) dimming is
accomplished using Linear’s proprietary patent pending
switch array, an on board charge pump, and an RMS-to-
Linear converter. When dimming the LND060 converts the
phase control signal to 1kHz PWM waveform to reduce
flicker.
FEATURES
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Lowest cost offline LED driver (Up to 277VAC)
No inductors, transformers or HV capacitors required
Fewer LEDs required than other direct drive
solutions
Up to 18W LED driver solution
High power factor >0.9
THD <25%
No electrolytic capacitors
No flicker, uniform brightness
Dimming:
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Standard TRIAC dimmer compatible
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Re-organizes LEDs
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Converts to 1kHz PWM dimming to eliminate
flicker at low dimming levels
LED recombination to optimize LED utilization, PF
and THD
Current programmability for individual segments
Over current protection
Over temperature protection with automatic restart
Power package
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Up to Tj=150 C Operation
ESD protected
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APPLICATIONS
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Solid state lighting
LED fluorescent tube replacement
Replacement lamps for 120V and 230VAC
General LED lighting
LED street lamps
APPLICATIONS DIAGRAM
EXAMPLE APPLICATIONS
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Linear Dimensions Semiconductor Inc.
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22620 Ricardo Rd, Cupertino CA 95014 USA
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tel 312.321.1810
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fax 312.321.1830
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www.lineardimensions.com
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LINEAR_DIMENSIONS [ LINEAR DIMENSIONS SEMICONDUCTOR ]
