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KA2142C
Vertical Deflection Output Circuit
Features |
Description |
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• |
High output current |
The KA2142C is a monolithic linear IC designed for color |
• |
Pump - up circuit |
TV and monitor vertical deflection output. It is intended for |
• |
Low dissipation |
direct drive of the deflection coils with a high efficiency. |
•Minimum number of external parts required
•Direct drive to the deflectin coils
• Internal thermal shutdown circuit |
10-SIP H/S |
Applications
•Power Amplifier
•Thermal Protection
•Flyback Generator
Internal Block Diagram
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+ |
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Vcc(L) |
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Vcc(H) |
+ |
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2 |
9 |
4 |
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FLYBACK |
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GENERATOR |
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Sawtooth IN |
1 |
+PRE |
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DRIVE |
OUTPUT |
6 |
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Vref |
10 |
-AMP |
STAGE |
STAGE |
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THERMAL |
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SHUTDOWN |
D.Y |
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5 |
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+ |
+ |
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Rev. 1.0.0
©2001 Fairchild Semiconductor Corporation
KA2142C
Pin Assignments
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KA2142AC |
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1 |
2 |
3 |
4 |
5 |
6 |
7 |
Pin Number |
Symbol |
I/O |
Pin Function Descrition |
1 |
Vin ( - ) |
I |
Inverting Input |
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2 |
Vcc(L) |
I |
Supply Voltage |
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3 |
- |
- |
N.C. |
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4 |
F.G |
O |
Flyback Generator |
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5 |
GND |
- |
Ground |
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6 |
VO |
O |
Output |
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7 |
- |
- |
N.C. |
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8 |
- |
- |
N.C. |
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9 |
Vcc(H) |
I |
Output Stage Supply Voltage |
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10 |
Vin ( + ) |
I |
Non-Inverting Input |
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2
KA2142C
Pin Definitions
Pin Number |
Pin Name |
Waveform |
Equivalent Circuit |
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vcc |
1 |
Inverting Input |
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1 |
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2 |
Voltage Supply |
DC |
- |
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vCC |
4 |
Flyback Generator |
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4 |
5 |
Ground |
DC |
- |
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vCC |
6 |
Output Voltage |
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6 |
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2Vs |
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9 |
Output Stage Voltage Supply |
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- |
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Vs |
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vcc
10 |
Non-Inverting Input |
DC |
10 |
3
KA2142C
Absolute Maximum Rating ( Ta = 25oC )
Parameter |
Symbol |
Value |
Unit |
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Supply Voltage |
Vcc(L) |
35 |
V |
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Flyback Peak Voltage |
V6, V9 |
70 |
V |
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Flyback Generator Voltage |
V6 |
35 |
V |
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Input Voltage |
V1, V10 |
V cc(L) - 0.5 |
V |
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Peak - to - Peak Output Current* |
Io(p-p) |
3 |
A |
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Peak - to - Peak Flyback Current |
I4(p-p) |
3 |
A |
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( f = 50 or 60Hz, Tfb ≤ 1.5mS ) |
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Total Power Dissipation ( Ta = 25oC ) |
PD |
15 |
W |
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Storage Temperature Range |
Tstg |
-40 ~ +150 |
oC |
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Operating Ambient Temperature |
Topt |
-25 ~ +70 |
oC |
* Maximum output peak to peak current in TV or Monitor set.
Thermal Data
Parameter |
Symbol |
Value |
Unit |
Thermal Resistance Between Junction and Case |
Rth ( j - c ) |
12 |
oC/W |
Thermal Resistance Between Junction and Ambient |
Rth ( j - a) |
60 |
oC/W |
Thermal Shut down Temperature |
Ttsd |
150 |
oC |
4
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