2001 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.0
Features
High output current
Pump - up circuit
Low dissipation
Minimum number of external parts required
Direct drive to the deflectin coils
Internal thermal shutdown circuit
Applications
Power Amplifier
Thermal Protection
Flyback Generator
Description
The KA2142C is a monolithic linear IC designed for color
TV and monitor vertical deflection output. It is intended for
direct drive of the deflection coils with a high efficiency.
10-SIP H/S
Internal Block Diagram
DRIVE
STAGE
PRE
AMP
+
-
OUTPUT
STAGE
FLYBACK
GENERATOR
2
1
10
5
THERMAL
SHUTDOWN
6
9
4
+
+
Vcc
(L)
+
D.Y
+
Vcc
(H)
Sawtooth IN
Vref
KA2142C
Vertical Deflection Output Circuit
KA2142C
4
Absolute Maximum Rating ( Ta = 25
o
C )
* Maximum output peak to peak current in TV or Monitor set.
Thermal Data
Parameter
Symbol
Value
Unit
Supply Voltage
V
cc(L)
35
V
Flyback Peak Voltage
V6, V9
70
V
Flyback Generator Voltage
V6
35
V
Input Voltage
V1, V10
V cc(L) - 0.5
V
Peak - to - Peak Output Current*
Io
(p-p)
3
A
Peak - to - Peak Flyback Current
( f = 50 or 60Hz, Tfb
1.5mS )
I4
(p-p)
3
A
Total Power Dissipation ( Ta = 25
o
C )
P
D
15
W
Storage Temperature Range
T
stg
-40 ~ +150
o
C
Operating Ambient Temperature
T
opt
-25 ~ +70
o
C
Parameter
Symbol
Value
Unit
Thermal Resistance Between Junction and Case
R
th ( j - c )
12
o
C/W
Thermal Resistance Between Junction and Ambient
R
th ( j - a)
60
o
C/W
Thermal Shut down Temperature
T
tsd
150
o
C
KA2142C
5
Electrical Characteristic
(Refer to the test circuit ,V cc(L)= 35V,unless otherwise specified)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
Supply Voltage
V
CC(L)
-
15
25
35
V
V
CC(H)
15
-
70
V
Supply Quiescent Current
I
CC(L)
-
-
6
16
mA
I
CC(H)
-
22
36
mA
Pin4 Saturation Voltage to Gnd
V
4SAT
I4 = 20mA
-
0.5
1
V
Saturation Voltage to supply
V
HSAT
I6 = -1.2A
-
1.6
2.2
V
I6 = -0.7A
-
1.3
1.8
V
Saturation Voltage to ground
V
LSAT
I6 = 1.2A
-
1
1.4
V
I6 = 0.7A
-
0.7
1
V
Output Center Voltage
V
MID
R1=5.6K,Rfb=45K
V1=V10=2V
-
18
-
V
Input Bias Current
I
BIAS
V1 = 1V, V10 = 2V
-
-0.1
-1
A
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