BCR402 Infineon Technologies Corporation, BCR402 Datasheet - Page 2

• Manufacturer Part Number: BCR402
• Description: Light Emitting Diode ( Led ) Driver ic Provides Constant Led Current Independent of Supply Voltage Variation
• Manufacturer: Infineon Technologies Corporation

is also found in the BCR402R datasheet. Two
cases are shown: “open”, e.g. R1 is omitted (no
R1 used), showing nominal current to be 20mA,
and R1=68Ω, yielding 30mA. For current up to
60mA, R1 will take on values less than 68Ω, and
R1 can be determined experimentally. Note that
in all cases,
The power dissipation is simply calculated by
multiplying the voltage drop across the device
(e.g. voltage between pins 2 and 3) times the
device current.
use when determining if a given circuit design
falls within device power dissipation guidelines
may be found at [1].
Figure 2.
Devices in the Infineon LED Driver Family.
Current can be adjusted from these nominal
values via use of a single external resistor.
AN 066 Rev D
1. BCR402R output current should be
2. Total power dissipation of BCR402R
limited to 60mA
should be limited to less than 330 mW
for device soldering point temperatures
(T
S
) equal to or less than 87 °C.
Nominal Output Currents of
A good general reference for
2 / 8
Figure 3.
Supply Voltage for external resistor = OPEN
and external resistor = 68Ω.
2. Application Circuit
The
demonstrate the difference between stabilizing
LED current using an Infineon LED driver IC,
versus using a series resistance to stabilize
current.
initially set up to operate over a supply
voltage range of 9V to 16V.
be used to easily toggle between BCR402R
mode and “resistor” mode.
Figure 4.
application
This particular circuit has been
Applications Note No. 066
BCR402R Output Current vs.
circuit
is
Silicon Discretes
Please refer to
The switch may
designed
16-Jan-2004
to