pq1cf1 ETC-unknow, pq1cf1 Datasheet - Page 4

• Manufacturer Part Number: pq1cf1
• Description: To-220 Type Chopper Regulator
• Manufacturer: ETC-unknow

V
8 to 35V
Chopper Regulators
IN
Fig. 9 Oscillation Frequency Fluctuation
Fig.11 Threshold Voltage vs. Junction
–10
Step-down Type Circuit Diagram (5V Output)
0.5
1.5
–5
2
1
5
0
0
–25
–40 –20 0
vs. Junction Temperature
Temperature
V
C
L=90 H, C=0.068 F,
R=5.1k
C
220 F
+
IN
IN
IN
=12V, Vo=5V,
=220 F, Co=1000 F,
Junction temperature T
0
Junction temperature T
1
PQ1CF1
4
3
C
0.068 F
25
20 40 60 80 100 120 140
C
R
5.1k
C
2
5
50
ON/OFF control
V
V
THH
THL
V
75
TH(ON)
D R
L
90 H
R
3k
1k
j
2
1
V
Vo=5V
j
(˚C)
100
(˚C)
IN
=12V
125
C
1000 F
+
O
V
O
=5V
V
5 to 30V
IN
Fig.10 Overcurrent Detecting Level
Fig.12 Operating Dissipation Current vs.
Polarity Inversion Type Circuit Diagram (-5V output)
–10
–15
15
10
15
10
–5
5
0
5
0
C
220 F
+
–25
IN
0
Fluctuation vs. Junction Temperature
Input Voltage
1
Io=1A
PQ1CF1
0
Junction temperature T
4
3
C
0.068 F
10
Input voltage V
C
R
5.1k
C
2
Io=3A
5
25
ON/OFF control
No load
50
20
D R
L
65 H
IN
75
R
3k
1k
2
1
(V)
30
Tj=25˚C
Vo=5V
j
100
(˚C)
C
2200 F
+
O
PQ1CF1
125
40
V
O
=–5V