pq1cf2 ETC-unknow, pq1cf2 Datasheet - Page 8

• Manufacturer Part Number: pq1cf2
• Description: To-220 Type Chopper Regulator
• Manufacturer: ETC-unknow

Chopper Regulators
Fig. 6 Approximate Inductance of coil
Fig. 7 Circuit Example for Polarity Inversion Type
V
5 to 30V
IN
Approximate inductance of coil (at output voltage is 5V)is shown in fig.6
<<Polarity-inversion type>>
In case of polarity-inversion type, it operates different from step down voltage type. In order to have stable output voltage,
please select the inductor of from 47 H to 200 H.
C
100 F
+
IN
1
PQ1CF2
4
3
5
C
2
S
ON/OFF control
R
1000
S
Tr
100
10
D R
L
130 H
0
R
3k
1k
2
1
Vo=5V
10
R
C
2200 F
Input voltage V
S
+
<=50k
O
V
O
20
=–5V
IN
(V)
30
I
I
O
O
I
=0.2A
=0.5A
O
=1A
40
PQ1CF2