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CIRCUIT DESCRIPTION
PRINCIPLE OF THE FLOATING REGULATOR
Vref:
Reference voltage at CV
lref:
Reference voltage at CC
Va:
Ground at CV
Is:
Ground at CC
The output voltage at CC operation
2
e
loRs= P= Iretice Ope.)
__
Vo=
R, Vref
The output current at CC operation
_ Ry
R, +R,
Ip= Bs Iref (where K =
)
s
Vref _Vo
RI
~R2
Fig. 2
With the PD series, the constant output voltage and cur-
rent are obtained by changing the Vref and Iref.
———
28 V
U12, 2 pin
Rectified waveform
—OVv
10 ms (50 Hz)
8.3 ms (60 Hz)
L
—+14V
U12, 1 pin
Comparator output
—-14V
—7V
U12, 7 pin
Integrated output
——- OV
U13, 7 pin
ead
PWN output
—-14V
U14, 3 pin
One shot
I
|
}
output
—oOvV
01, D2 cathode
SCR output
OFF ON
Fig. 3
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