Fairchild Semiconductor KA2142 Datasheet
KA2142C
Vertical Deflection Output Circuit
www.fairchildsemi.com
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
Internal Block Diagram
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
+
Sawtooth IN
Vref
©2001 Fairchild Semiconductor Corporation
1
10
+
-
PRE
AMP
Vcc
(L)
Vcc
2
5
(H)
9 4
DRIVE
STAGE
+
FLYBACK
GENERATOR
OUTPUT
STAGE
THERMAL
SHUTDOWN
+
6
D.Y
+
Rev. 1.0.0
KA2142C
Pin Assignments
KA2142A
1 2 3 4 5 6 7
Pin Number Symbol I/O Pin Function Descrition
1 Vin ( - ) I Inverting Input
2 Vcc(L) I Supply Voltage
3- -N.C.
4 F.G O Flyback Generator
5 GND - Ground
6V
7- -N.C.
8- -N.C.
9 Vcc(H) I Output Stage Supply Voltage
10 Vin ( + ) I Non-Inverting Input
O
C
O Output
2
Pin Definitions
Pin Number Pin Name Waveform Equivalent Circuit
v
KA2142C
cc
1 Inverting Input
1
2 Voltage Supply DC -
4 Flyback Generator
5 Ground DC -
v
CC
6 Output Voltage
v
CC
4
6
9 Output Stage Voltage Supply -
2Vs
Vs
v
cc
10 Non-Inverting Input DC
10
3
KA2142C
Absolute Maximum Rating ( Ta = 25oC )
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
Peak - to - Peak Flyback Current
( f = 50 or 60Hz, Tfb ≤ 1.5mS )
Total Power Dissipation ( Ta = 25
o
C ) P
Storage Temperature Range T
Operating Ambient Temperature T
* Maximum output peak to peak current in TV or Monitor set.
I4
(p-p)
(p-p)
D
stg
opt
3A
3A
15 W
-40 ~ +150
-25 ~ +70
Thermal Data
Parameter Symbol Value Unit
Thermal Resistance Between Junction and Case R
Thermal Resistance Between Junction and Ambient R
th ( j - c )
th ( j - a)
Thermal Shut down Temperature T
tsd
12
60
150
o
o
C
C
o
C/W
o
C/W
o
C
4
Loading...