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BCR400W
Active Bias Controller
Characteristics
• Supplies stable bias current even at low battery
3
voltage and extreme ambient temperature variation
2
4
1
• Low voltage drop of 0.7V
Application notes
4
• Stabilizing bias current of NPN transistors
3
and FET's from less than 0.2mA up to
BDTIC
more than 200mA
• Ideal supplement for Sieget and other transistors
1
• also usable as current source up to 5mA
2
EHA07188
• Pb-free (RoHS compliant) package1)
• Qualified according AEC Q101
Type
BCR400W
Marking
Pin Configuration
W4s
1=GND/ENPN 2=Contr/BNPN 3VS
Package
4=Rext/CNPN SOT343
(ENPN, BNPN, CNPN are electrodes of a stabilized NPN transistor)
Maximum Ratings
Parameter
Symbol
Source voltage
VS
18
V
Control current
IContr.
10
mA
Control voltage
VContr.
16
V
Reverse voltage between all terminals
VR
0.5
Total power dissipation, TS = 117 °C
Ptot
330
mW
Junction temperature
Tj
150
°C
Storage temperature
Tstg
Value
Unit
-65 ... 150
Thermal Resistance
Junction - soldering point2)
RthJS
≤ 100
K/W
1Pb-containing package may be available upon special request
2For calculation of R
please refer to Application Note Thermal Resistance
thJA
1
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2007-05-29
BCR400W
Electrical Characteristics at TA=25°C, unless otherwise specified
Symbol
Parameter
Values
Unit
min.
typ.
max.
I0
-
20
40
µA
Imin
-
0.1
-
mA
DC Characteristics
Additional current consumption
VS = 3 V
Lowest stabilizing current
VS = 3 V
BDTIC
DC Characteristics with stabilized NPN-Transistors
VSmin
-
1.6
-
Vdrop
-
0.65
-
Change of IC versus hFE
hFE = 50
∆IC/I C
-
0.08
-
Change of IC versus V S
VS = 3 V
∆IC/I C
-
0.15
-
∆VS/VS
Change of IC versus TA
∆IC/I C
-
0.2
-
%/K
Lowest sufficient battery voltage
V
IB (NPN) < 0.5mA
Voltage drop (VS - VCE)
IC = 25 mA
∆h FE /
hFE
2
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2007-05-29
BCR400W
Collector current I C = f (hFE)
Collector Current I C = f (VS)
IC and h FE refer to stabilized NPN Transistor
of stabilized NPN Transistor
Parameter Rext. (Ω)
Parameter Rext. (Ω)
10 3
10 3
mA
2.1
mA
5.9
5.9
10 2
12.4
IC
IC
10 2
BDTIC
10
1
10
0
67
67
10
1
10
0
760
760
4.3k
10 -1
0
50
100
150
200
-
250
10 -1
0
350
2
4
6
V
8
hFE
11
VS
Voltage drop Vdrop = f (IC )
Collector current I C = f (Rext.)
of stabilized NPN Transistor
V
10 3
2
mA
1.7
10 2
1.5
IC
Vdrop
1.6
1.4
1.3
10 1
1.2
1.1
1
10 0
0.9
0.8
0.7
0.6
0.5 -2
10
10
-1
10
0
10
1
10
2
10 -1 0
10
mA10 3
10
1
10
2
IC
10
3
Ohm10 4
Rext.
3
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2007-05-29
BCR400W
Collector current TA = f (IC)
Control current I = f (Rext.)
of stabilized NPN Transistor
in current source application
Parameter: Rext. (Ω)
10 1
10 3
mA
2.2
mA
IContr.
6
10 2
IC
26
BDTIC
65
10 1
10 0
290
760
10 0
4.3k
10 -1
-40 -20
0
20
40
60
80 100 120 °C
10 -1 -1
10
160
10
0
10
1
10
2
3
KOhm
10
Rext.
TA
Control current I = f (TA)
Control current I = f (V S)
in current source application
in current source application
2.2
1.5
mA
mA
1.8
1.1
IContr.
IContr.
1.2
1
0.9
1.6
1.4
0.8
1.2
0.7
1
0.6
0.8
0.5
0.4
0.6
0.3
0.4
0.2
0.2
0.1
0
-20
0
20
40
60
80
°C
0
0
110
2
4
TA
6
8
V
11
VS
4
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2007-05-29
BCR400W
Total power dissipation Ptot = f (TS )
400
Note that up to TS=115°C
it is not possible to exceed Ptot
mW
respecting the maximum
ratings of VS and IContr.
P tot
300
The collector or drain
current (respectively) of
the stabilized RF transistor
does not affect BCR 400
directly, as it provides just the
base current.
250
BDTIC
200
150
100
50
0
0
20
40
60
80
100
120 °C
150
TS
Typical application for GaAs FET
with active bias controller
RF IN
RF OUT
100 pF
100 k Ω
100 k Ω
BCR 400
1
4
2
3
R ext
1 nF
- VG
+VS
5
EHA07190
www.BDTIC.com/infineon
2007-05-29
BCR400W
RF transistor controlled by BCR400
+V S
BCR 400
3
R ext.
Vdrop
4
Be aware that BCR400 stabilized
bias current of transistors in an active
control loop
ΙC
BDTIC
1
2
C1
In order to avoid loop ascillation
(hunting),
time constants must be chosen
adequately, i.e. C1 >= 10 x C2
C2
RF OUT
Ι contr.
RF IN
RF-Transistor
EHA07217
RX/TX antenna switch, compatible to control logic
and working at wide battery voltage range
Antenna
λ/ 4
TX
RX
BCR 400
RX
TX
R ext = 100 Ω - 220 Ω
1
4
2
3
+ VS > 2.7 V
EHA07218
6
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2007-05-29
BCR400W
Low voltage reference
BCR 400
1
4
BDTIC
2
Red
LED
+VS
3
V REF
EHA07219
Precision timer with BCR400
providing constant charge current
+VS
BCR 400
3
2
R ext
7 8
4
Timer IC
(555)
4
1
3
6
2
1
5
EHA07191
7
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2007-05-29
Package SOT343
BCR400W
Package Outline
0.9 ±0.1
2 ±0.2
0.1 MAX.
1.3
0.1
A
1
2
0.1 MIN.
0.15
1.25 ±0.1
3
2.1 ±0.1
4
0.3 +0.1
-0.05
+0.1
0.15 -0.05
+0.1
0.6 -0.05
4x
0.1
0.2
M
M
A
BDTIC
Foot Print
1.6
0.8
0.6
1.15
0.9
Marking Layout (Example)
Manufacturer
2005, June
Date code (YM)
BGA420
Type code
Pin 1
Standard Packing
Reel ø180 mm = 3.000 Pieces/Reel
Reel ø330 mm = 10.000 Pieces/Reel
0.2
2.3
8
4
Pin 1
2.15
1.1
8
www.BDTIC.com/infineon
2007-05-29
BCR400W
Published by
Infineon Technologies AG
81726 München, Germany
© Infineon Technologies AG 2007.
All Rights Reserved.
Attention please!
The information given in this data sheet shall in no event be regarded as a guarantee
of conditions or characteristics (“Beschaffenheitsgarantie”). With respect to any
examples or hints given herein, any typical values stated herein and/or any information
regarding the application of the device, Infineon Technologies hereby disclaims any
and all warranties and liabilities of any kind, including without limitation warranties of
non-infringement of intellectual property rights of any third party.
BDTIC
Information
For further information on technology, delivery terms and conditions and prices
please contact your nearest Infineon Technologies Office (www.infineon.com).
Warnings
Due to technical requirements components may contain dangerous substances.
For information on the types in question please contact your nearest
Infineon Technologies Office.
Infineon Technologies Components may only be used in life-support devices or
systems with the express written approval of Infineon Technologies, if a failure of
such components can reasonably be expected to cause the failure of that
life-support device or system, or to affect the safety or effectiveness of that
device or system.
Life support devices or systems are intended to be implanted in the human body,
or to support and/or maintain and sustain and/or protect human life. If they fail,
it is reasonable to assume that the health of the user or other persons
may be endangered.
9
www.BDTIC.com/infineon
2007-05-29