Fairchild KSA928A service manual
KSA928A
Audio Power Amplifier
• Complement to KSC2328A
• Collector Power Dissipation : PC=1W
• 3 Watt Output Application
KSA928A — Audio Power Amplifier
February 2008
1
TO-92L
1. Emitter 2. Collector 3. Base
Absolute Maximum Ratings T
=25°C unless otherwise noted
C
Symbol Parameter Value Units
V
CBO
V
CEO
V
EBO
I
C
P
C
T
J
T
STG
Electrical Characteristics T
Collector-Base Voltage -30 V
Collector-Emitter Voltage -30 V
Emitter-Base Voltage -5 V
Collector Current -2 A
Collector Power Dissipation 1 W
Junction Temperature 150 °C
Storage Temperature -55 ~ 150 °C
=25°C unless otherwise noted
C
Symbol Parameter Test Condition Min. Typ. Max. Units
BV
CBO
BV
CEO
BV
EBO
I
CBO
I
EBO
h
FE
V
(on) Base-Emitter On Voltage VCE= -2V, IC= -500mA -1.0 V
BE
V
(sat) Collector-Emitter Saturation Voltage IC= -1.5A, IB= -30mA -2.0 V
CE
C
ob
f
T
NOTES:
1) These ratings are limiting values above which the serviceability of any semiconductor device may be impaired.
2) These are steady state limits. The factory should be consulted on applications involving pulsed or low duty cycle operations.
3) These ratings are based on a maximum junction temperature o f 150degrees C.
Collector-Base Breakdown Voltage IC= -100μA, IE=0 -30 V
Collector-Emitter Breakdown Voltage IC= -10mA, IB=0 -30 V
Emitter-Base Breakdown Voltage IE= -1mA, IC=0 -5 V
Collector Cut-off Current VCB= -30V, IE=0 -100 nA
Emitter Cut-off Current VEB= -5V, IC=0 -100 nA
DC Current Gain VCE= -2V, IC= -500mA 100 320
Output Capacitance VCB= -10V, IE=0, f=1MHz 48 pF
Current Gain Bandwidth Product VCE= -2V, IC= -500mA 120 MHz
hFE Classification
Classification O Y
h
FE
© 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com
KSA928A Rev. 1.0.0 1
100 ~ 200 160 ~ 320
Typical Performance Characteristics
KSA928A — Audio Power Amplifier
-1400
-1200
-1000
-800
-600
-400
[mA], COLLECTOR CURRENT
C
I
-200
0
0-2-4-6-8-10-12-14-16
VCE[V], COLLECTOR-EMITTER VOLTAGE
Figure 1. Static Characteristic Figure 2. DC current Gain
= 50 I
I
-1
o
C
-0.1
Ta = 25
C
Ta = 125oC
IB = -7mA
IB = -6mA
IB = -5mA
IB = -4mA
IB = -3mA
IB = -2mA
IB = -1mA
B
1000
100
, DC CURRENT CURRENT
FE
h
10
-1 -10 -100 -1000
VCE = -2V
-5000
IC[A], COLLECTOR CURRENT
-1400
-1200
-1000
-800
-600
VCE = -2V
-400
(sat)[V], SATURATION VOLTAGE
CE
V
-0.01
-1 -10 -100 -1000 -10000
Ta = -40
o
C
IC[mA], COLLECTOR CURRENT
[mA], COLLECTOR CURRENT
-200
C
I
0
0.0 -0.2 -0.4 -0.6 -0.8 -1.0 -1.2 -1.4
VBE[V], BASE-EMITTER VOLTAGE
Figure 3. Collector-Emitter Saturation Voltage Figure 4. Base-Emitter On Voltage
-10
IC(MAX)PLUSE
IC(MAX)
-1
-0.1
[A], COLLECTOR CURRENT
C
I
-0.01
-0.1 -1 -10 -100
1ms
1s
D
C
T
O
a
p
e
=
r
a
2
o
t
5
i
o
C
n
V
CEO
VCE[V], COLLECTOR-EMITTER VOLTAGE
MAX
1.4
1.2
1.0
0.8
0.6
0.4
[W], POWER DISSIPATION
C
P
0.2
0.0
0 255075100125150175
Ta[oC], AMBIENT TEMPERATURE
Figure 5. Safe Operating Area Figure 6. Power Derating
© 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com
KSA928A Rev. 1.0.0 2
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