View BCR400W_1152361.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

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
3 4
Maximum Ratings Parameter Source voltage Control current Control voltage Reverse voltage between all terminals Total power dissipation, TS = 117 C Junction temperature Storage temperature Symbol VS IContr. VContr. VR Ptot Tj Tstg Value 18 10 16 0.5 330 150 -65 ... 150 mW C Unit V mA V

2
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
1 2
EHA07188
1
4 3
VPS05605
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)
Thermal Resistance Junction - soldering point 1) RthJS
100
K/W
1For calculation of R thJA please refer to Application Note Thermal Resistance
1
Aug-07-2001
BCR400W
Electrical Characteristics at TA=25C, unless otherwise specified Parameter DC Characteristics Additional current consumption VS = 3 V Lowest stabilizing current VS = 3 V Imin 0.1 mA I0 20 40 A Symbol min. Values typ. max. Unit
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 VS VS = 3 V Change of IC versus TA Vdrop IC /IC IC /IC IC /IC 0.65 0.08 0.15 0.2 hFE /
VSmin
-
1.6
-
V
hFE VS /VS
2
Aug-07-2001

%/K
BCR400W
Collector current IC = f (hFE ) IC and hFE refer to stabilized NPN Transistor Parameter Rext. ()
10 3
mA
Collector Current IC = 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
10
67
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
h FE
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
V drop
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
Aug-07-2001
BCR400W
Collector current T A = f (IC) of stabilized NPN Transistor Parameter: R ext.()
10
mA 2.2
3
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
0
10
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 (VS ) in current source application
1.5 mA
2.2
mA
1.2
1.8
IContr.
1 0.9 0.8 0.7 0.6
IContr.
C
1.1
1.6 1.4 1.2 1 0.8
0.5 0.4 0.3 0.2 0.1 0 -20 0 20 40 60 80 110 0.2 0 0 2 4 6 8
V
0.6 0.4
11
TA
VS
4
Aug-07-2001
BCR400W
Total power dissipation P tot = f (T S)
400
mW
300
Note that up to TS=115C it is not possible to exceed P tot 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.
Ptot
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
5
EHA07190
Aug-07-2001
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
Aug-07-2001
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 15
EHA07191
Timer IC (555)
7
Aug-07-2001

▲Up To Search▲

Price & Availability of BCR400W

	To Download BCR400W Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .