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BCR400W
Active Bias Controller Characteristics * Supplies stable bias current even at low battery voltage and extreme ambient temperature variation * Low voltage drop of 0.7V Application notes * Stabilizing bias current of NPN transistors and FET's from less than 0.2mA up to more than 200mA * Ideal supplement for Sieget and other transistors * also usable as current source up to 5mA * Pb-free (RoHS compliant) package1) * Qualified according AEC Q101
1 2
EHA07188
3 4 1
2
4
3
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 Source voltage Control current Control voltage Reverse voltage between all terminals Total power dissipation, TS = 117 C Junction temperature Storage temperature Thermal Resistance Junction - soldering point2)
RthJS 100
Symbol VS IContr. VContr. VR Ptot Tj Tstg
Value 18 10 16 0.5 330 150 -65 ... 150
Unit V mA V mW C
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
BCR400W
Electrical Characteristics at TA=25C, unless otherwise specified Parameter DC Characteristics Additional current consumption VS = 3 V Lowest stabilizing current VS = 3 V
DC Characteristics with stabilized NPN-Transistors Lowest sufficient battery voltage IB (NPN) < 0.5mA Voltage drop (VS - VCE) IC = 25 mA Change of IC versus hFE hFE = 50 Change of IC versus V S VS = 3 V Change of IC versus TA IC/I C IC/I C IC/I C 0.08 0.15 0.2 h FE / hFE VS/VS
Symbol min. I0 Imin -
Values typ. 20 0.1 max. 40 -
Unit
A mA
VSmin Vdrop
-
1.6 0.65
-
V
%/K
2
2007-05-29
BCR400W
Collector current I C = f (hFE) IC and h FE refer to stabilized NPN Transistor Parameter Rext. ()
10 3
mA
Collector Current I C = f (VS) of stabilized NPN Transistor Parameter Rext. ()
10 3
mA 2.1 5.9
10 2
5.9
10 2
12.4
IC
IC
67
10
1
67
10
1
760
10
0
760
10
0
4.3k
10 -1 0
50
100
150
200
250
-
350
10 -1 0
2
4
6
8
V
11
hFE
VS
Voltage drop Vdrop = f (IC )
Collector current I C = f (Rext.) of stabilized NPN Transistor
10 3
mA
V
2
1.7 1.6
10 2
Vdrop
1.5 1.4 1.3 1.2 1.1 1 0.9 0.8 0.7 0.6 0.5 -2 10 10
-1
IC
10 1 10 0
0 1 2
10
10
10
mA10 3
10 -1 0 10
10
1
10
2
10
3
Ohm10 4
IC
Rext.
3
2007-05-29
BCR400W
Collector current TA = f (IC) of stabilized NPN Transistor Parameter: Rext. ()
10 3
mA 2.2
Control current I = f (Rext.) in current source application
10 1
10 2
6
mA
IC
26
10 1
65
IContr.
10 0 10 -1 -1 10
290
10 0
760
4.3k
10 -1 -40 -20
0
20
40
60
80 100 120 C
160
10
0
10
1
10
2
KOhm 3 10
TA
Rext.
Control current I = f (TA) in current source application
Control current I = f (V S) in current source application
1.5 mA
2.2
mA
1.2
1.8
IContr.
1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 -20 0 20 40 60 80
C
IContr.
1.1
1.6 1.4 1.2 1 0.8 0.6 0.4 0.2
110
0 0
2
4
6
8
V
11
TA
VS
4
2007-05-29
BCR400W
Total power dissipation Ptot = f (TS )
400
mW
300
Note that up to TS=115C it is not possible to exceed Ptot respecting the maximum ratings of VS and IContr. The collector or drain current (respectively) of the stabilized RF transistor does not affect BCR 400 directly, as it provides just the base current.
P tot
250
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 BCR 400 1 4 R ext 3
2 100 k - VG 1 nF
+VS
EHA07190
5
2007-05-29
BCR400W
RF transistor controlled by BCR400
BCR 400
+V S 3 R ext. 4 Vdrop
C
1 2 C1 C2
Be aware that BCR400 stabilized bias current of transistors in an active control loop In order to avoid loop ascillation (hunting), time constants must be chosen adequately, i.e. C1 >= 10 x C2
RF OUT
contr.
RF IN
RF-Transistor
EHA07217
RX/TX antenna switch, compatible to control logic and working at wide battery voltage range
Antenna TX
/ 4 RX
BCR 400 RX TX 1 4
R ext = 100 - 220
2
3
+ VS > 2.7 V
EHA07218
6
2007-05-29
BCR400W
Low voltage reference
BCR 400 1 4
2 Red LED V REF
3
+VS
EHA07219
Precision timer with BCR400 providing constant charge current
+VS BCR 400 3 R ext 4 1 6 2 2 78 4 3 1 5
EHA07191
Timer IC (555)
7
2007-05-29
Package SOT343
BCR400W
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 o180 mm = 3.000 Pieces/Reel Reel o330 mm = 10.000 Pieces/Reel
4 0.2
Pin 1
2.15
2.3
8
1.1
8
2007-05-29
BCR400W
Published by Infineon Technologies AG 81726 Munchen, Germany (c) 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. 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
2007-05-29

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