Collector–Emitter VoltageV
Collector–Base VoltageV
Emitter–Base VoltageV
Collector Current — ContinuousI
CEO
CBO
EBO
C
– 32Vdc
– 32Vdc
– 5.0Vdc
– 100mAdc
THERMAL CHARACTERISTICS
CharacteristicSymbolMaxUnit
Total Device Dissipation FR– 5 Board, (1)
TA = 25°C
Derate above 25°C
Thermal Resistance, Junction to Ambient R
T otal Device Dissipation
Alumina Substrate, (2) TA = 25°C
Derate above 25°C
Thermal Resistance, Junction to AmbientR
Junction and Storage T emperatureTJ , T
P
D
225mW
1.8mW/°C
θJA
P
D
556°C/W
300mW
2.4mW/°C
θJA
stg
417°C/W
–55 to +150°C
BCW61CLT1
BCW61DLT1
3
1
2
CASE 318–08, STYLE 6
SOT–23 (TO–236AB)
DEVICE MARKING
BCW61BLT1 = BB, BCW61CLT1 = BC, BCW61DLT1 = BD
ELECTRICAL CHARACTERISTICS (T
= 25°C unless otherwise noted.)
A
CharacteristicSymbolMinMaxUnit
OFF CHARACTERISTICS
Collector–Emitter Breakdown Voltage
(IC = –2.0 mAdc, IB = 0 )
Emitter–Base Breakdown Voltage
(I E= –1.0 µAdc, I C = 0)
Collector Cutoff CurrentI
(VCE = –32 Vdc, )—–20nAdc
(VCE = –32 Vdc, TA = 150°C)—–20µAdc
1. FR– 5 = 1.0 x 0.75 x 0.062 in.
2. Alumina = 0.4 x 0.3 x 0.024 in. 99.5% alumina.
V
(BR)CEO
V
(BR)EBO
– 32—Vdc
– 5.0—Vdc
CES
M10–1/6
Page 2
LESHAN RADIO COMPANY, LTD.
BCW61BLT1 BCW61CLT1 BCW61DLT1
ELECTRICAL CHARACTERISTICS (T
= 25°C unless otherwise noted) (Continued)
A
CharacteristicSymbolMinMaxUnit
ON CHARACTERISTICS
DC Current Gainh
( IC= – 10 µAdc, VCE = – 5.0 Vdc )BCW61B30—
BCW61C40—
BCW61D100—
( IC= – 2.0 mAdc, VCE = – 5.0 Vdc )h
BCW61B140310
BCW61C250460
BCW61D380630
( IC= – 50 mAdc, VCE = – 1.0 Vdc )h
BCW61B80—
BCW61C100—
BCW61D100—
AC Current Gainh
( VCE = – 5.0Vdc, IC= – 2.0 mAdc,BCW61B175350
f= 1.0 kHz )BCW61C250500
DUTY CYCLE, D = t
D CURVES APPL Y FOR POWER
PULSE TRAIN SHOWN
READ TIME AT t 1 (SEE AN–569)
= r(t) • R
Z
θJA(t)
T
J(pk)
– T A = P
θJA
(pk) Z θJA(t)
t, TIME (ms)
Figure 14. Thermal Response
C
ob
/ t
1
2
M10–5/6
Page 6
4
10
V
= 30 V
CC
3
10
I
2
10
1
10
CEO
I
CBO
AND
@ V
BE(off)
= 3.0 V
I
0
10
–1
10
, COLLECTOR CURRENT (nA)
C
–2
10
I
–4–20+20+40+60 + 80 +100 +120 +140 +160
CEX
T J , JUNCTION TEMPERATURE (°C)
Figure 15. Typical Collector Leakage Current
LESHAN RADIO COMPANY, LTD.
BCW61BLT1 BCW61CLT1 BCW61DLT1
DESIGN NOTE: USE OF THERMAL RESPONSE DA T A
A train of periodical power pulses can be represented by the
model as shown in Figure 15. Using the model and the device
thermal response the normalized effective transient thermal resistance of Figure 14 was calculated for various duty cycles.
To find Z
the steady state value R
Example:
The MPS3905 is dissipating 2.0 watts peak under the following conditions:
t 1 = 1.0 ms, t 2 = 5.0 ms. (D = 0.2)
Using Figure 14 at a pulse width of 1.0 ms and D = 0.2, the
reading of r(t) is 0.22.
The peak rise in junction temperature is therefore
∆T = r(t) x P
For more information, see AN–569.
, multiply the value obtained from Figure 14 by
θJA(t)
(pk)
x R
.
θJA
= 0.22 x 2.0 x 200 = 88°C.
θJA
M10–6/6
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