2
Motorola Bipolar Power Transistor Device Data
ELECTRICAL CHARACTERISTICS (T
C
= 25 C unless otherwise noted)
Characteristic Symbol Min Max Unit
OFF CHARACTERISTICS
Collector–Emitter Breakdown Voltage
(1)
BD676, 676A
(I
C
= 50 mAdc, I
B
= 0) BD678, 678A
BD680, 680A
BD682
BV
CEO
45
60
80
100
—
—
—
—
Vdc
Collector Cutoff Current (V
CE
= Half Rated V
CEO
, I
B
= 0) I
CEO
— 500 µAdc
Collector Cutoff Current
(V
CB
= Rated BV
CEO
, I
E
= 0)
(V
CB
= Rated BV
CEO
. I
E
= 0, T
C
= 100°C)
I
CBO
—
—
0.2
2.0
mAdc
Emitter Cutoff Current (V
BE
= 5.0 Vdc, I
C
= 0) I
EBO
— 2.0 mAdc
ON CHARACTERISTICS
DC Current Gain
(1)
(I
C
= 1.5 Adc, V
CE
= 3.0 Vdc) BD676, 678, 680, 682
(I
C
= 2.0 Adc, V
CE
= 3.0 Vdc) BD676A, 678A, 680A
h
FE
750
750
—
—
Collector–Emitter Saturation Voltage
(1)
(I
C
= 1.5 Adc, I
B
= 30 mAdc) BD678, 680, 682
(I
C
= 2.0 Adc, I
B
= 40 mAdc) BD676A, 678A, 680A
V
CE(sat)
—
—
2.5
2.8
Vdc
Base–Emitter On Voltage
(1)
(I
C
= 1.5 Adc, V
CE
= 3.0 Vdc) BD678, 680, 682
(I
C
= 2.0 Adc, V
CE
= 3.0 Vdc) BD676A, 678A, 680A
V
BE(on)
—
—
2.5
2.5
Vdc
DYNAMIC CHARACTERISTICS
Small–Signal Current Gain (I
C
= 1.5 Adc, V
CE
= 3.0 Vdc, f = 1.0 MHz) h
fe
1.0 — —
(1) Pulse Test: Pulse Width 300 µs, Duty Cycle 2.0%.
Figure 2. DC Safe Operating Area
5.0
1.0
V
CE
, COLLECTOR–EMITTER VOLTAGE (VOLTS)
2.0
1.0
0.5
0.05
2.0 5.0 10 50 100
BONDING WIRE LIMIT
THERMAL LIMIT at T
C
= 25
°
C
SECONDARY BREAKDOWN LIMIT
0.2
0.1
I
C
, COLLECTOR CURRENT (AMP)
T
C
= 25
°
C
BD676, 676A
BD678, 678A
BD680, 680A
BD682
20
There are two limitations on the power handling ability of a
transistor average junction temperature and secondary
breakdown. Safe operating area curves indicate I
C
– V
CE
lim-
its of the transistor that must be observed for reliable opera-
tion; e.g., the transistor must not be subjected to greater
dissipation than the curves indicate.
At high case temperatures, thermal limitations will reduce
the power that can be handled to values less than the limita-
tions imposed by secondary breakdown.
Figure 3. Darlington Circuit Schematic
BASE
PNP
BD676, 676A
BD678, 678A
BD680, 680A
BD682
COLLECTOR
EMITTER
8.0 k 120
