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DK- 414N- 4 Development Kit Manual
2.1 Heat Sink
The heat sink is a high performance, low cost, compact air cooled copper sub mount with copper fins and a
bolt pattern in the front that enables easy mounting of the CBM-380 modules. The typical thermal resistance
from heat sink to ambient with the fan in operation is 0.3 oC/W, thereby enabling significant power
dissipation.
2.2 Driver Board
Due to the grounded common anode topology, each driver requires a -12 V DC input, and can provide drive
currents up to 14 A to one LED in a CBM-380. The driver board is capable of driving the LEDs in either CW
or pulsed mode. PWM dimming is achieved with a 0-5 V signal from a function generator and frequencies up
to 40 kHz are supported.
Figure 2 depicts the layout of the driver board along with the pins and commonly used readouts. The signal
pins are used to achieve external current control and provide PWM dimming; the orientation of these pins is
also shown, starting with pin 1 on the left. Table 5 lists the pin-out for the signal pins.
Power Input
Signal Pins
Pin 1 - GND
Fan Power (J10)
Potentiometer (P1)
LED Power (P10)
Sense Resistor Test
Studs
Thermistor
Figure 2: Driver board layout.
2.3 Cable Assembly
Each development kit includes the following cables:
?
?
?
Power supply to driver board cable
Driver board to LED cable (with a fan cable)
Signal cable
For optimum performance, and to avoid ringing when pulsing the LEDs, increasing the length of the driver
board to LED cable is not recommended. The figures below illustrate the cables included in the development
kit.
960031 Rev C ? Luminus Devices, Inc. All rights reserved.
Page 3
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