Sharp PQ2CF1 Datasheet
Chopper Regulators
PQ2CF1
PQ2CF1
(Under Development)
■ 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]
■ Applications
¡Personal computers/Word processors
¡Printers
¡Switching power supplies
¡Facsimiles
TO-220 Package, Step Up Output Chopper Regulator
2.8±0.2
2.0
5.0±0.5
3.2±0.5
(Unit : mm)
16.4±0.7
4.4MIN
■ Outline Dimensions
10.2MAX
φ3.2±0.1
7.4±0.2
PQ2CF1
(24.6)
●1●2 ●3●4 ●5
3.6±0.2
5-0.8±0.1
4-(1.7)
4.5±0.2
(1.5)
(0.5)
(5.0)
8.2±0.7
· ( ) : Typical value
· Radius of lead forming
portion:R=TYP.1.0
1 V
SW
2 V
IN
3 COM
C
4 V
5 O
ADJ
■ Absolute Maximum Ratings
*1
Input voltage
*2
Switching voltage
Error input voltage
*3
ON/OFF control voltage
Switching current
Power dissipation (No heat sink)
Power dissipation (With infinite heat sink)
*4
Junction temperature
Operating temperature
Storage temperature
Soldering temperature
*1
Voltage between V
*2
Voltage between V
*3
Voltage between V
*4
Overheat protection may operate at 125=<T
“ 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. ”
Parameter Symbol Rating Unit
IN
terminal and COM terminal
SW
terminal and COM terminal
C
terminal and COM terminal
j
=<150˚C.
V
V
SW
V
ADJ
V
I
SW
P
D1
P
D2
T
T
opr
T
stg
T
IN
C
j
sol
(Ta=25˚C)
35
35
7
7
2.5
1.5
15
150
-20 to +80
-40 to +150
260 (For 10s)
· Please refer to the chapter“ Handling Precautions ”.
V
V
V
V
A
W
W
˚C
˚C
˚C
˚C
Chopper Regulators
PQ2CF1
■ Electrical Characteristics
(Unless otherwise specified, conditions shall be VIN=5V,Io=0.2A,VC=12V, Ta=25˚C)
Parameter Symbol Conditions UnitMAX.TYP.MIN.
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
|RegL|
V
ISW=2A
V
SAT
V
ref
j
=0 to 125˚C
T
∆V
ref
O
=70 to 570mA
I
IN
=3.5 to 10V
V
eg
I|
|R
O
=0.5A
I
η
fo
j
=0 to 125˚C
T
∆fo
5 terminal is open
MAX
D
Duty=50%,
I
L
4 terminal=0V, 4 terminal
I
CHG1
4 terminal=0.5V, 4 terminal
I
CHG2
Duty=0%, 4 terminal
V
V
V
THON
I
I
THL
CH
CL
SD
q
terminal is open,
1
1
terminal is open, 5 terminal=1.4V
1 terminal is open, 4 terminal
IN
=35V, 4 terminal=0V,No L,CO,
V
1,R2
D,R
VIN=35V, 4 terminal=0.5V,No L,
S
O
,D,R1,R
C
2
-
-
5
terminal=1.1V
-
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
Fig.1 Test Circuit Fig.2 Power Dissipation vs. Ambient
Temperature
L
PQ2CF1
●4 ●5
1kΩ
90µH
●3
I
SD
A
I
QS
V
IN
C
IN
100µF
0.047µF
D
●1●2
R
2
R
1
1kΩ
++
C
O
470µF
I
O
V
O
15
(W)
Load
D
10
20
D1
:No heat sink
P
P
D2
:With infinite heat sink
D2
P
V
V
%
%
%
%
kHz
%
%
A
µA
µA
V
V
V
V
µA
mA
■ Block Diagram
V
IN
2
Voltage
regulator
circuit
Oscillator
Overcurrent
Low voltage
malfunction
prevention circuit
protection
circuit
protection
L : HK-12S100-9000 (made by Toho Co.)
D : ERC80-004 (made by Fuji electronics Co.)
F/F
Q
R
S
+
-
COMP.
Overheat
ON/OFF
Soft start
circuit
circuit
V
C
+
-
Error amp.
Amp.
V
COM
5
Power dissipation P
P
V
SW
1
0
-20 0 20 40 60 10080
D1
Ambient temperature Ta (˚C)
Note) Oblique line portion : Overheat
protection may operate in this area.
5
O
ADJ
ref
34
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