A Product Line of
Diodes Incorporated
ZXLD383
Single or multi cell LED driver with enable/rectifier input for solar
charged lamp applications
Description
Summary
The ZXLD383 is a single or multi cell LED
driver designed for applications requiring
step-up voltage conversion from a very low
input voltage. The IC generates constant
current pulses that are ideal for driving single
or multiple LEDs over a wide range of
operating voltages. It includes an on/off
enable input that can be driven directly from
a photocell array or an open collector/drain
logic output. The enable input features an
ultra-low voltage drop diode to ground,
eliminating the need for a photocell array
isolation diode in Garden Light applications.
The ZXLD383 uses a PFM control technique to
drive an internal switching transistor which
exhibits a low saturation resistance. This
ensures high efficiency, even for input voltages
as low as 1.0V.
The IC can start up under full load and operates
down to an input voltage of below 0.9V.
The ZXLD383 is offered in the space saving
TSOT23-5 package or in die form, offering an
excellent cost vs performance solution for
single cell LED driving applications.
Features
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85% efficiency
User
adjustable
output current
Single cell operation
Low saturation voltage
TSOT23-5 package
Available also in die form
Simple application circuit
Applications
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Garden lights
Door/pathway illumination
LED flashlight and torches
LED backlights
White LED driver
Gated boost supply generator
Z XLD 383
EN A
D iode A rray
GN D
2
L1
1
5
VC C
NC
N I MH
1. 2V
3
4
VOU T
LE D
© Diodes Incorporated, 2008
www.diodes.com
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