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REV.-A
2.3.2.7 +24 VDC Regulator Circuit
Figure 2-22 shows the
+24V regulator circuit.
The +24VDC regulator circuit has almost the same function and employs the same oscillation circuit
as the + 5V
VDC regulator circuit.
Here, the error amplifier AMP 2 is used for over-current control, and AMP 3 for constant-voltage control.
The operation of the error amplifier AMP 3 is as follows.
011
C3748
L1 R3
+0
NJM2355 (7A)
11
1’1
Osc
~
n
105C
C3
VREF
1
14 15 16
1 IK
R17
3.3K
(
— —
4 )
R16
)
1OOK
(
*
ik
4 b24VDC
?6
$. IK
1%
?2
!4K
Is
-ONo
D15
EO;;;:GA
30 Poo
Figure 2-22. +24V Regulator Circuit
2-23