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BCR401RE6327HTSA1

P1-P3P4-P6P7-P8
2009-11-13
4
BCR401R
Total power dissipation
P
tot
=
f
(
T
S
)
0 15 30 45 60 75 90 105 120
°C
150
T
S
0
30
60
90
120
150
180
210
240
270
300
mA
360
P
tot
Permissible Pulse Load
R
thJS
=
f
(
t
p
)
10
-7
10
-6
10
-5
10
-4
10
-3
10
-2
10
0
s
t
p
0
10
1
10
2
10
3
10
K/W
R
thJS
0.5
0.2
0.1
0.05
0.02
0.01
0.005
D = 0
Permissible Pulse Load
P
totmax
/
P
totDC
=
f
(
t
p
)
10
-7
10
-6
10
-5
10
-4
10
-3
10
-2
10
0
s
t
p
0
10
1
10
2
10
-
P
totmax
/
P
totDC
D = 0
0.005
0.01
0.02
0.05
0.1
0.2
0.5
2009-11-13
5
BCR401R
Supply current versus supply voltage
I
S
=
f
(
V
S
)
Load: two LEDs with
V
F
= 3.8V in series
0 2 4 6 8 10 12 14 16
V
20
V
S
-5
10
-4
10
-3
10
A
I
S
Output current versus supply voltage
I
out
=
f
(
V
S
);
R
ext
= Parameter
Load: two LEDs with
V
F
= 3.8V in series
0 2 4 6 8 10 12 14 16
V
20
V
S
-3
10
-2
10
-1
10
A
I
out
Rext = 36 Ohm
Rext = 82 Ohm
Rext = 160 Ohm
Rext = open
Output current versus reference voltage
I
out
=
f
(
V
DROP
);
V
S
= 10V;
V
out
= 7.6V
0.6 0.65 0.7 0.75 0.8 0.85 0.9
V
1
V
drop
-5
10
-4
10
-3
10
-2
10
-1
10
A
I
out
2009-11-13
6
BCR401R
Application Circuit:
supply voltages >18V
Standard Application Circuit:
V d r o p
B C R 4 0 1 R
R e x t
3
4
2
1
+ V s
I s I o u t
Rsense
(optional)
Vsupply
BCR401R
BCR402R
LEDs
Vs
GND
Rext
Iout
LEDs
I
OUT
I
OUT
+ I
DRIVER
I
DRIVER
Application hints
BCR401R serves as an easy to use constant current source for LEDs. In stand alone
application an external resistor can be connected to adjust the current from 10 mA to 60 mA.
Rext can be determined by using the diagram 'Output current versus external resistor',
or by refering to diagram 'Output current versus reference voltage'. Look for your desired
output current on the y axis and read out the corresponding Vdrop. Calculate Rext:
Rext = Vdrop / (Iout -(Vdrop/Rint))
Please take into account that the resulting output currents will be slightly lower due to the
self heating of the component and the negative thermal coefficient.
Please visit our web site for application notes: www.infineon.com/lowcostleddriver
• AN066 explains the basic concept
• AN077 gives hints to thermal design
• AN159 provides information how to add a power transistor to increase the output current
P1-P3P4-P6P7-P8

BCR401RE6327HTSA1

Mfr. #:
Buy BCR401RE6327HTSA1
Manufacturer:
Infineon Technologies
Description:
LED Lighting Drivers AF SMALL INTEGRATION IC LED DRVR 18V
Lifecycle:
New from this manufacturer.
Delivery:
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