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PhlatLight ? DK-114N Series Development Kit Manual
Key Features
? Drive any CBT or PT series PhlatLight LED up to 14A
? Pulse frequencies of greater than 40kHz possible
? Analog current control via on-board potentiometers or ex-
ternal voltage
? Simple current and voltage measurements
? Fast rise and fall times - less than 1 microsecond
? Fast current level switching - less than 5 microseconds
Development Kit Contents
The contents of each PhlatLight DK-114A Development Kit will
depend on the number of channels ordered. As shown in Figure
1, each kit includes the following components:
? Interface board
? Heat sink/driver board assembly
? Cable assemblies
? Thermal interface materials and mounting hardware
? User Manual
Each interface board supports up to 3 channels. For configura-
tions of greater than 3 channels, additional interface boards
are included. Additional channels will increase the quantities
of each of these components. The following sections describe
the components in detail.
This development kit was designed with flexible features to al-
low for easy evaluation of PhlatLight LEDs. It was not opti-
mized for size or for direct integration in end products.
However, the underlying circuit and thermal design can be
used as a reference by system designers. To this effect, the
complete design files including schematics, mechanical draw-
ings, and bills of materials are available upon request.
Heat Sink / Driver Board Assembly
The heat sink and driver board are packaged together and
mounted on a common metal substrate (Figure 2). The module
can be left as a free-standing assembly on a bench-top or it can
be mounted on an optical table by using the standard optical
post mounted on the heat sink.
Figure 2: Heat sink / Driver board Assembly
Heat Sink
The heat sink is a high performance, low cost and compact air
cooled aluminum extrusion. Measuring only 40 mm x 40 mm x
40mm, the heat sink occupies a very small volume. The typical
thermal resistance from heat sink to ambient with the fan in
operation is 0.6 oC/W, thereby enabling significant power dis-
sipation.
The bolt pattern on the front face of the sink allows for easy
mounting of all CBT and PT series modules. All modules can be
mounted either horizontally or vertically, allowing for easy
prototypes of systems.
Driver Board
The driver board, designed around National Semiconductor’s
LM3433 IC, is designed to provide up to 14A of current to any
PT or CBT series PhlatLight LED. The board is mounted close to
the heat sink and LED to ensure cable lengths are kept at a
minimum (<3”). Longer cable lengths will cause increased cur-
rent ringing when pulsing the LEDs.
Using a negative-rail, grounded common anode topology, the
LM3433 driver board enables the anodes of multiple PhlatLight
LEDs to be in electrical contact with each other. There is no
need to electrically isolate the anodes of the LEDs from each
other or the heat sink.
Figure 1: Single Channel Evaluation Kit Contents
? 2009 Luminus Devices, Inc. - All Rights Reserved
Page 2
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