" In the absence of confirmation by device specification sheets,SHARP takes no responsibility for any defects that may occur in equipment using any SHARP devices
shown in catalogs,data books,etc.Contact SHARP in order to obtain the latest version of the device specification sheets before using any SHARP's device. "
Chopper Regulators
PQ2CF1
PQ2CF1
Parameter
Symbol
Rating
Unit
V
IN
V
SW
V
ADJ
V
C
I
SW
P
D1
P
D2
T
j
T
opr
T
stg
T
sol
35
35
7
7
2.5
1.5
15
150
-20 to +80
-40 to +150
260 (For 10s)
V
V
V
V
A
W
W
C
C
C
C
Input voltage
Switching voltage
Error input voltage
ON/OFF control voltage
Switching current
Power dissipation (No heat sink)
Power dissipation (With infinite heat sink)
Junction temperature
Operating temperature
Storage temperature
Soldering temperature
*1
*2
*3
*4
*1
Voltage between V
IN
terminal and COM terminal
*2
Voltage between V
SW
terminal and COM terminal
*3
Voltage between V
C
terminal and COM terminal
*4
Overheat protection may operate at 125=<T
j
=<150C.
s
Absolute Maximum Ratings
(T
a
=25C)
Please refer to the chapter" Handling Precautions ".
TO-220 Package, Step Up Output Chopper Regulator
s
Outline Dimensions
(Unit : mm)
PQ2CF1
1 V
SW
2 V
IN
3 COM
4 V
C
5 O
ADJ
(24.6)
10.2MAX
7.40.2
3.60.2
3.20.1
5-0.80.1
4-(1.7)
4.50.2
2.80.2
16.40.7
2.0
3.20.5
q
1
q
2
q
3
q
4
q
5
5.00.5
(5.0)
8.20.7
(0.5)
(1.5)
4.4MIN
( ) : Typical value
Radius of lead forming
portion:R=TYP.1.0
s
Features
Maximum switching current : 2.5A
Built-in soft start function
Built-in oscillation circuit
(oscillation frequency : TYP.50kHz)
Built-in overheat protection,overcurrent protection
function
Variable output voltage (4.5 to 40V)
[Possible to choose step up output/flyback method
acording to external connection circuit]
s
Applications
Personal computers/Word processors
Printers
Switching power supplies
Facsimiles
(Under Development)
Chopper Regulators
PQ2CF1
Parameter
Symbol
Conditions
Unit
MAX.
TYP.
MIN.
-
1.235
-
-
-
-
40
-
90
2.7
-80
-150
0.55
1.65
0.3
0.1
-
-
0.6
1.26
0.5
0.1
0.2
85
50
5
-
4.4
-50
-100
0.75
1.85
0.45
0.2
270
4.0
1.2
1.285
-
1.5
1.5
-
60
-
-
5.8
-20
-50
0.95
2.05
0.6
0.3
400
12
s
Electrical Characteristics
(Unless otherwise specified, conditions shall be V
IN
=5V,Io=0.2A,V
C
=12V, T
a
=25C)
V
SAT
V
ref
V
ref
|R
eg
L|
|R
eg
I|
fo
fo
D
MAX
I
L
I
CHG1
I
CHG2
V
THL
V
CH
V
CL
V
THON
I
SD
I
q
S
V
V
%
%
%
%
kHz
%
%
A
A
A
V
V
V
V
A
mA
I
SW
=2A
-
T
j
=0 to 125C
I
O
=70 to 570mA
V
IN
=3.5 to 10V
I
O
=0.5A
-
T
j
=0 to 125C
5 terminal is open
Duty=50%,
4 terminal=0V, 4 terminal
4 terminal=0.5V, 4 terminal
Duty=0%, 4 terminal
1 terminal is open, 5 terminal=1.1V
1 terminal is open, 5 terminal=1.4V
1 terminal is open, 4 terminal
V
IN
=35V, 4 terminal=0V,No L,C
O
,
D,R
1
,R
2
V
IN
=35V, 4 terminal=0.5V,No L,
C
O
,D,R
1
,R
2
Output saturation voltage
Reference voltage
Temperature change in reference voltage
Load regulation
Line regulation
Efficiency
Oscillation frequency
Oscillation frequency temperature fluctuation
Maximum duty
Over current detecting level
Charge current 1
Charge current 2
Input threshold voltage
Vc terminal low level voltage
Vc terminal high level voltage
On threshold voltage
Stand-by current
Output OFF-state consump-tion current
Fig.1
Test Circuit
Fig.2
Power Dissipation vs. Ambient
Temperature
,,
,,
,,
,,
20
0
5
10
15
-20
0
20
40
60
100
80
P
D2
P
D1
Power dissipation P
D
(W)
Ambient temperature T
a
(C)
P
D1
:No heat sink
P
D2
:With infinite heat sink
Note) Oblique line portion : Overheat
protection may operate in this area.
V
IN
I
SD
I
QS
C
IN
100
F
0.047
F
Load
C
O
470
F
R
1
1k
R
2
I
O
V
O
+
+
q
3
q
1
q
2
q
4
q
5
A
L
90
H
L : HK-12S100-9000 (made by Toho Co.)
D : ERC80-004 (made by Fuji electronics Co.)
D
PQ2CF1
1k
s
Block Diagram
V
SW
V
IN
+
-
+
-
F/F
Q
R
S
Voltage
regulator
circuit
COMP.
V
ref
O
ADJ
V
C
COM
ON/OFF
circuit
Soft start
Oscillator
Low voltage
malfunction
prevention circuit
Overcurrent
protection
circuit
Overheat
protection
circuit
Error amp.
Amp.
5
1
3
4
2
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