Active Bias Controller (Supplies stable bias current even at low battery voltage and extreme ambient temperature variation)
BCR 400W Active Bias Controller
Characteristics • Supplies stable bias current even at low battery voltage
and extreme ...
BCR 400W 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 FETs from
from less than 0.2mA up to more than 200mA
Ideal supplement for SIEGET and other RF transistors also usable as current source up to 5mA
Type
Marking Ordering Code Pin Configuration
Package
BCR 400W W4s
Q62702-C2481 1 GND/ENPN 2 Contr/BNPN 3 VS 4 Rext/CNPN SOT-343
(ENPN,BNPN,CNPN are electrodes of a stabilized NPN transistor)
Maximum Ratings Parameter Supply
voltage Control current Control
voltage Reverse
voltage between all terminals Total power dissipation, TS = 117°C Junction temperature Storage temperature Thermal Resistance Junction ambient
1)
Symbol
Values 18 10 16 0.5 330 150 - 65 ... + 150 ≤ 170 ≤ 100
Unit V mA V mW °C
VS IContr. VContr. VR Ptot Tj Tstg RthJA RthJS
K/W
Junction - soldering point
1) Package mounted on pcb 40mm x 40mm x 1.5mm / 6cm2 Cu
Semiconductor Group
1
Nov-27-1996
BCR 400W
Electrical Characteristics at TA=25°C, unless otherwise specified Parameter Symbol min. DC Characteristics Additional current consumption Values typ. max. Unit
I0
20 0.1 40
µA mA -
VS = 3 V
Lowest stabilizing current
Imin
VS = 3 V
DC Characteristics with stabilized NPN-Transistors Lowest sufficient battery
voltage
VSmin
1.6 0.65 0.08 0.15 0.2 -
V
IB (NPN) < 0.5 mA
Voltage drop (VS - VCE)
Vdrop
∆ IC...