LMBT4401LT1 Datasheet, PDF (4/6 Pages) Leshan Radio Company – General Purpose Transistor

LESHAN RADIO COMPANY, LTD.
SMALL–SIGNAL CHARACTERISTICS
NOISE FIGURE
V CE = 10 Vdc, T A = 25°C
Bandwidth = 1.0 Hz
LMBT4401LT1
10
10
I _C = 1.0 mA, R _S = 150 Ω
f = 1.0 kHz
8.0
I _C = 500 µA, R _S = 200 Ω
R _S = OPTIMUM
I _C = 100 µA, R _S = 2.0 kΩ
RS = SOURCE
8.0
I _C = 50 µA, R _S = 4.0 kΩ
RS = RESISTANCE
6.0
6.0
I _C = 50 µA
I _C = 100 µA
I _C = 500 µA
I _C = 1.0 mA
4.0
4.0
2.0
2.0
0
0.010.02 0.05 0.1 0.2
0.5 1.0 2.0 5.0 10 20
f , FREQUENCY (kHz)
Figure 9. Frequency Effects
50 100
0
500 100 200
500 1.0k 2.0k 5.0k 10k 20k 50k 100k
R _S, SOURCE RESISTANCE (kΩ)
Figure 10. Source Resistance Effects
h PARAMETERS
(V _CE = 10 Vdc, f = 1.0 kHz, T _A = 25°C)
This group of graphs illustrates the relationship between h fe and other “h” parameters for this series of
ransistors. To obtain these curves, a high–gain and a low–gain unit were selected from the LMBT4401LT1
lines, and the same units were used to develop the correspondingly numbered curves on each graph.
300
50
LMBT4401LT1 UNIT 1
200
20
LMBT4401LT1 UNIT 2
100
70
LMBT4401LT1 UNIT 1
LMBT4401LT1 UNIT 2
50
30
20
0.1
10
7.0
5.0
3.0
2.0
0.2 0.3 0.5 0.7 1.0
2.0 3.0 7.0 5.0 10
I _C , COLLECTOR CURRENT (mA)
Figure 11. Current Gain
LMBT4401LT1 UNIT 1
LMBT4401LT1 UNIT 2
1.0
0.7
0.5
0.3
0.2
0.1
0.2 0.3 0.5 0.7 1.0
2.0 3.0 7.0 5.0 10
I _C , COLLECTOR CURRENT (mA)
Figure 13. Voltage Feedback Ratio
10
5.0
2.0
1.0
0.5
0.1
100
50
20
10
5.0
0.2 0.3 0.5 0.7 1.0
2.0 3.0 7.0 5.0 10
I _C , COLLECTOR CURRENT (mA)
Figure 12. Input Impedance
LMBT4401LT1 UNIT 1
LMBT4401LT1 UNIT 2
2.0
1.0
0.1
0.2 0.3 0.5 0.7 1.0
2.0 3.0 7.0 5.0 10
I _C , COLLECTOR CURRENT (mA)
Figure 14. Output Admittance
LMBT4401LT1–4/6