Philips BU4508AX Datasheet
Philips Semiconductors Product specification
Silicon Diffused Power Transistor BU4508AX
GENERAL DESCRIPTION
Enhanced performance, new generation, high-voltage, high-speed switching npn transistor in a plastic full-pack
envelope intended for use in horizontal deflection circuits of colour television receivers an p.c monitors. Features
exceptional tolerance to base drive and collector current load variations resulting in a very low worst case
dissipation.
QUICK REFERENCE DATA
SYMBOL PARAMETER CONDITIONS TYP. MAX. UNIT
V
V
I
I
P
V
I
t
C
CM
Csat
f
CESM
CEO
tot
CEsat
Collector-emitter voltage peak value VBE = 0 V - 1500 V
Collector-emitter voltage (open base) - 800 V
Collector current (DC) - 8 A
Collector current peak value - 15 A
Total power dissipation Ths ≤ 25 ˚C - 45 W
Collector-emitter saturation voltage IC = 5.0 A; IB = 1.25 A - 3.0 V
Collector saturation current f = 16kHz 5.0 - A
f = 64kHz 4.0 - A
Fall time I
= 5A; f = 16kHz 0.35 0.48 µs
Csat
I
= 4A; f = 64kHz 0.17 - µs
Csat
PINNING - SOT399 PIN CONFIGURATION SYMBOL
PIN DESCRIPTION
1 base
2 collector
case
c
b
3 emitter
case isolated
LIMITING VALUES
Limiting values in accordance with the Absolute Maximum Rating System (IEC 134)
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
V
V
I
C
I
CM
I
B
I
BM
-I
P
T
T
CESM
CEO
BM
tot
stg
j
Collector-emitter voltage peak value VBE = 0 V - 1500 V
Collector-emitter voltage (open base) - 800 V
Collector current (DC) - 8 A
Collector current peak value - 15 A
Base current (DC) - 4 A
Base current peak value - 6 A
Reverse base current peak value
1
Total power dissipation Ths ≤ 25 ˚C - 45 W
Storage temperature -55 150 ˚C
Junction temperature - 150 ˚C
123
e
-5A
THERMAL RESISTANCES
SYMBOL PARAMETER CONDITIONS TYP. MAX. UNIT
R
th j-hs
R
th j-a
1 Turn-off current.
May 1998 1 Rev 1.000
Junction to heatsink with heatsink compound - 2.8 K/W
Junction to ambient in free air 35 - K/W
Philips Semiconductors Product specification
Silicon Diffused Power Transistor BU4508AX
ISOLATION LIMITING VALUE & CHARACTERISTIC
Ths = 25 ˚C unless otherwise specified
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V
isol
C
isol
STATIC CHARACTERISTICS
Ths = 25 ˚C unless otherwise specified
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
I
CES
I
CES
I
EBO
BV
EBO
V
CEOsust
V
CEsat
V
BEsat
h
FE
h
FE
Repetitive peak voltage from all R.H. ≤ 65 % ; clean and dustfree - - 2500 V
three terminals to external
heatsink
Capacitance from T2 to external f = 1 MHz - 22 - pF
heatsink
Collector cut-off current
2
VBE = 0 V; VCE = V
VBE = 0 V; VCE = V
Tj = 125 ˚C
CESMmax
; - - 2.0 mA
CESMmax
- - 1.0 mA
Emitter cut-off current VEB = 6.0 V; IC = 0 A - - 100 µA
Emitter-base breakdown voltage IB = 1 mA 7.5 13.5 - V
Collector-emitter sustaining voltage IB = 0 A; IC = 100 mA; 800 - - V
L = 25 mH
Collector-emitter saturation voltages IC = 5.0 A; IB = 1.25 A - - 3.0 V
Base-emitter saturation voltage IC = 5.0 A; IB = 1.25 A 0.85 0.94 1.03 V
DC current gain IC = 100 mA; VCE = 5 V - 12 -
IC = 5.0 A; VCE = 5 V 4.2 5.7 7.3
DYNAMIC CHARACTERISTICS
Ths = 25 ˚C unless otherwise specified
SYMBOL PARAMETER CONDITIONS TYP. MAX. UNIT
C
c
t
s
t
f
t
s
t
f
Collector capacitance IE = 0 A; VCB = 10 V; f = 1 MHz 80 - pF
Switching times (16 kHz line I
deflection circuit) (IB2 = -2.5 A)
= 5.0 A;IB1 = 1.0 A
Csat
Turn-off storage time 3.2 4.3 µs
Turn-off fall time 0.35 0.48 µs
Switching times (64 kHz line I
deflection circuit) (IB2 = -2.0 A)
= 4.0 A;IB1 = 0.8 A
Csat
Turn-off storage time 1.9 - µs
Turn-off fall time 0.17 - µs
2 Measured with half sine-wave voltage (curve tracer).
May 1998 2 Rev 1.000
Philips Semiconductors Product specification
Silicon Diffused Power Transistor BU4508AX
30-60 Hz
IC / mA
250
200
100R
6V
Fig.1. Test circuit for V
100-200R
Horizontal
Oscilloscope
Vertical
1R
.
CEOsust
+ 50v
ICsat
90 %
IC
10 %
IB
ts
IB1
tf
- IB2
Fig.4. Switching times definitions.
+ 150 v nominal
adjust for ICsat
Lc
t
t
100
0
VCE / V
Fig.2. Oscilloscope display for V
TRANSISTOR
IC
IB
VCE
DIODE
26us20us
64us
min
VCEOsust
CEOsust
ICsat
IB1
IB2
Fig.3. Switching times waveforms (16 kHz).
IBend
LB
T.U.T.
Cfb
-VBB
.
t
t
t
Fig.5. Switching times test circuit
hFE
100
VCE = 1V
10
1
0.001 0.01 0.1 1 10
Ths = 25 C
Ths = 85 C
.
IC / A
Fig.6. High and low DC current gain.
May 1998 3 Rev 1.000
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