BCR410W
Active Bias Controller
Characteristics
•
Supplies stable bias current from 1.8V operating
voltage on
•
Low voltage drop:
110mV for 10mA collector currrent
Application notes
•
Stabilizing bias current of NPN transistors and
FET's from 100µA to 20mA
+
-
=
V
re f
4
S e n s e
3
Io u t
3
4
1
2
•
Ideal supplement for Sieget and other transistors
1
V s
2
G N D
•
Pb-free (RoHS compliant) package
1)
•
Qualified according AEC Q101
Type
BCR410W
Maximum Ratings
Parameter
Supply voltage
Output current
Marking
W8s
1= Vs
Pin Configuration
2=GND 3=Iout
4=Sense
Package
SOT343
Unit
V
mA
mW
°C
Symbol
V
S
I
out
P
tot
T
j
T
stg
R
thJS
Value
18
0.5
100
150
-65 ... 150
Total power dissipation,
T
S
= 110 °C
Junction temperature
Storage temperature
Thermal Resistance
Junction - soldering point
2)
≤
470
K/W
1Pb-containing package may be available upon special request
2For calculation of
R
please refer to Application Note Thermal Resistance
thJA
1
2007-05-29
BCR410W
Electrical Characteristics
at T
A
= 25°C, unless otherwise specified
Symbol
Values
Parameter
min.
DC Characteristics
Additional current consumption
V
S
= 3 V
I
0
-
200
400
typ.
max.
Unit
µA
DC Characteristics with stabilized NPN-Transistors
Lowest sufficient battery voltage
Voltage drop
I
C
= 10 mA
Change of
I
C
versus
h
FE
h
FE
= 50
Change of
I
C
versus
V
S
V
S
= 3 V
Change of
I
C
versus
T
A
∆I
C
/I
C
∆I
C
/I
C
∆I
C
/I
C
-
-
-
tbd
2
0.15
-
-
-
∆h
FE
/
h
FE
V
Smin
V
drop
-
-
1.8
110
-
-
V
mV
%/V
%/K
2
2007-05-29
BCR410W
Collector Current
I
C
=
f
(V
S
)
of stabilized NPN Transistor
Parameter
R
ext.
(Ω)
10
2
300
mV
mA
Voltage drop
V
drop
=
f
(I
C
)
240
15 Ohm
22 Ohm
47 Ohm
100 Ohm
V
drop
5.5
10
1
Ic
10 Ohm
220
200
180
160
140
10
0
120
100
80
220 Ohm
470 Ohm
1000 Ohm
60
40
20
10
-1
2.0
2.5
3.0
3.5
4.0
4.5
V
Vs
0
-1
10
10
0
10
1
mA
10
2
I
C
Collector current
I
C
=
f
(R
ext.
)
of stabilized NPN Transistor
10
2
Total power dissipation
P
tot
=
f
(T
S
)
120
mA
mW
Ic
P
tot
2
3
10
1
80
60
10
0
40
20
10
-1 1
10
10
10
Ohm
10
4
Rext
0
0
20
40
60
80
100
120
°C
150
T
S
3
2007-05-29
BCR410W
Application Circuit:
V s
B C R 4 1 0 W
R e x t
=
-
+
V re f
L c
R b
R F o u t
R F in
R F T r a n s is to r
4
2007-05-29
Package SOT343
BCR410W
Package Outline
2
±0.2
1.3
4
3
0.15
1
0.3
+0.1
-0.05
4x
0.1
M
+0.1
0.6
-0.05
0.9
±0.1
0.1 MAX.
0.1
A
1.25
±0.1
2.1
±0.1
2
0.1 MIN.
0.15
-0.05
0.2
M
+0.1
A
Foot Print
0.6
0.8
1.15
0.9
Marking Layout (Example)
Manufacturer
1.6
2005, June
Date code (YM)
Pin 1
BGA420
Type code
Standard Packing
Reel ø180 mm = 3.000 Pieces/Reel
Reel ø330 mm = 10.000 Pieces/Reel
4
0.2
Pin 1
2.15
2.3
8
1.1
5
2007-05-29
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