BCR402UE6327_15 Datasheet, PDF (7/19 Pages) Infineon Technologies AG – LED Driver

1
LED Driver
BCR 402U E6327
LED Driver
1.1
Features
• LED drive current preset to 20 mA
• Output current adjustable up to 65 mA with an external resistor
• Easy paralleling of drivers to increase current
• Supply voltage up to 40 V
• High current accuracy at supply voltage variation
• Low voltage overhead of 1.4 V
SC74-3D
• Up to 750 mW power dissipation in a small SC74 package
• Negative thermal coefficient of -0.2 %/K reduces output current at higher temperatures
• RoHS compliant (Pb-free) package
• Automotive qualified according AEC Q101
1.2
Applications
• Channel letters for advertising, LED strips for decorative lighting
• Aircraft, train, ship illumination
• Retrofits for general lighting, white goods like refrigerator lighting
• Medical lighting
• Automotive applications like CHMSL and rear combination lights
1.3
General Description
The BCR 402U E6327 is a cost efficient LED driver to drive low power LEDs. The advantages towards resistor
biasing are:
• homogenous light output despite varying forward voltages in different LED strings
• homogenous light output of LEDs despite voltage drop across long supply lines
• homogenous light output independent from supply voltage variations
• longer lifetime of the LEDs due to reduced output current at higher temperatures (negative thermal coefficient)
The advantages towards discrete solutions are:
• lower assembly cost
• smaller form factor
• higher reliability due to less soldering joints
• higher output current accuracy due to pretested LED drivers
Dimming is possible by using an external digital transistor at the ground pin.
The BCR 402U E6327 can be operated at higher supply voltages by putting LEDs between the supply voltage V_S
and the power supply pin of the LED driver. You can find further details in our application notes.
The BCR 402U E6327 is a perfect fit for numerous low power LED applications by combining small form factor
with low cost. These LED drivers offer several advantages to resistors like significantly higher current control at
very low voltage drop ensuring high lifetime of LEDs.
Datasheet
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Revision 2.1, 2015-01-28