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20. Specification of Principal Part of Circuit
20-1) REGULATOR
OC
RA
3-TERMINAL 1A POSITIVE
VOLTAGE REGULATORS
The KA78XX series of three-terminal
positive regulators are available in the TO-
220 package and with several fixed output
voltages, making them useful in a wide
range of applications. Each type employs
internal current limiting, thermal shut-down
and safe area protection, making it
essentially indestructible. If adequate heat
sinking is provided, they can deliver over
1A output current. Although designed
primarily as fixed voltage regulators, these
devices
can be used with external
components to obtain adjustable voltages
and currents.
us FEATURES
* Output Current up to 1A
¢ Output Voltages of 5; 6; 8; 9; 10; 11; 12;
15; 18; 24V
* Thermal Overload Protection
¢ Short Circuit Protection
* Output Transistor SOA Protection
« BLOCK DIAGRAM
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most
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I
TO-220
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Be
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: Re
A
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t
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tinput
2GND
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Aa
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St
= ORDERING INFORMATION
tier
KA78XX |TO-220,
Tes
0~ 4125
!
KA78X
O- 20|
zl
|
Operating Temperature
|
KA78XX| |TO-220
-40~ +1250 _
INPUT
Oo
1
|
'
CURRENT
SOA
:
GENERATOR
PROTECTION
|
STARTING
REFERENCE
ERROR
-
CIRCUIT
VOLTAGE
AMPLIFIER
4
$
|
THERMAL
PROTECTION
|
GND
|
O
—O
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