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Semiconductor Components Industries, LLC, 2012
November, 2012 − Rev. 1
1 Publication Order Number:
EVBUM2155/D
NCP30653ABCKGEVB,
NCP3065SOBCKGEVB,
NCP3065SOBSTGEVB
High Intensity LED Drivers
Using NCP3065/NCV3065
Evaluation Board User's
Manual
Introduction
High brightness LEDs are a prominent source of light and
have better efficiency and reliability than conventional light
sources. Improvements in high brightness LEDs present the
potential for creative new lighting solutions that offer an
improved lighting experience while reducing energy
demand. LEDs require constant current driver solutions due
to their wide forward voltage variation and steep V/I transfer
function. For applications that are powered from low
voltage AC sources typically used in landscape lighting or
low voltage DC sources that may be used in automotive
applications, high efficiency driver that can operate over
wide range of input voltages to drive series strings of one to
several LEDs.
Figure 1. NCP3065 3A Buck Evaluation Board Figure 2. NCP3065 Buck Evaluation Board
NCP3065/NCV3065 EVALUATION BOARD
This evaluation board user’s manual describes a DC−DC
converter circuits that can easily be configured to drive
LEDs at several different output currents and can be
configured for either AC or DC input. The
NCP3065/NCV3065 can be configured in a several driver
topologies to a drive string of LEDs: be it traditional low
power LEDs or high brightness high power LEDs such as the
Lumileds Luxeon
K2 and Rebel series, the CREE
XLAMP
4550 or XR series, the OSRAM OSTAR
,
TopLED
and Golden Dragon
. Configurations like this
are found in 12 V
DC
track lighting applications, automotive
applications, and low voltage AC landscaping applications
as well as track lighting such as under-cabinet lights and
desk lamps that might be powered from standard
off-the-shelf 5 V
DC
and 12 V
DC
wall adapters. The
NCP3065/NCV3065 can operate as a switcher or as a
controller. These options are shown bellow.
The brightness of the LEDs or light intensity is measured
in Lumens and is proportional to the forward current flowing
through the LED. The light efficiency can vary with the
current flowing through the LED string.
The NCP3065 is rated for commercial/industrial
temperature ranges and the NCV3065 is automotive
qualified.
Evaluation Board Design Versions
The evaluation boards are designed to display the full
functionality and flexibility of NCP3065 as a driver to drive
various LEDs at the low voltage AC and DC sources. The
components are selected for the 15 W LED driver
http://onsemi.com
EVAL BOARD USER’S MANUAL
