SHARP PQ2CF1_01

Chopper Regulators
PQ2CF1
PQ2CF1
TO-220 Package, Step Up Output Chopper Regulator
■
■
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 35V)
[Possible to choose step up output / flyback method
according to external connection circuit]
(Unit : mm)
Outline Dimensions
●
4.5±0.2
10.2MAX
φ3.2±0.1
16.4±0.7
3.6±0.2
7.4±0.2
PQ2CF1
5–0.8±0.1
2.0
(1.5)
5.0±0.5
(24.6)
2.8±0.2
(0.5)
3.2=0.5
■
Applications
(5.0)
4–(1.7)
Personal computers / Word processors
Printers
● Switching power supplies
● Facsimiles
4.4MIN
●
●
8.2±0.7
●
1 2 3 4 5
• ( ) : Typical value
• Radius of lead forming
portion : R=TYP.1.0
1
2
3
4
5
■
Absolute Maximum Ratings
Parameter
❇1
❇2
❇3
❇4
❇1
❇2
❇3
❇4
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
VSW
VIN
COM
VC
OADJ
(Ta=25˚C)
Symbol
VIN
VSW
VADJ
VC
ISW
PD1
PD2
Tj
Topr
Tstg
Tsol
Rating
35
35
7
7
2.5
1.5
15
150
–20 to +80
–40 to +150
260 (For 10s)
Unit
V
V
V
V
A
W
W
˚C
˚C
˚C
˚C
Voltage between VIN terminal and COM terminal
Voltage between VSW terminal and COM terminal
Voltage between VC terminal and COM terminal
Overheat protection may operate at 125<=Tj<=150˚C.
• Please refer to the chapter " Handling Precautions ".
Notice
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 device specification sheets before using any SHARP device.
Internet Internet address for Electronic Components Group http://sharp-world.com/ecg/
Chopper Regulators
■
PQ2CF1
Electrical Characteristics
(Unless otherwise specified, conditions shall be VIN=5V,Io=0.2A,Vo=12V, Ta=25˚C)
Parameter
Output saturation voltage
Reference voltage
Reference voltage temperature fluctuation
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
Symbol
VSAT
Vref
∆Vref
| RegL |
| RegI |
η
fo
∆fo
DMAX
IL
ICHG1
ICHG2
VTHL
VCH
VCL
VTHON
Stand-by current
ISD
Output OFF-state dissipation current
Iq S
■
Block Diagram
Conditions
ISW=2A
––
Tj=0 to 125˚C
IO=70 to 570mA
VIN=3.5 to 10V
IO=0.5A
––
Tj=0 to 125˚C
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
VIN=35V, 4 terminal=0V,No L,CO,
D,R1,R2
VIN=35V, 4 terminal=0.5V,No L,
CO,D,R1,R2
VIN
2
MIN.
––
1.235
––
––
––
––
40
––
90
2.7
–80
–150
0.55
1.65
0.3
0.1
TYP.
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
MAX.
1.2
1.285
––
1.5
1.5
––
60
––
––
5.8
–20
–50
0.95
2.05
0.6
0.3
Unit
V
V
%
%
%
%
kHz
%
%
A
µA
µA
V
V
V
V
––
270
400
µA
––
4.0
12
mA
Vsw
1
F/F
R Q
Voltage
regulator
circuit
Amp.
S
Oscillator
+
5 OADJ
–
+
COMP.
Error amp.
Vref
Low voltage
Overcurrent
malfunction
protection
prevention circuit
circuit
Overheat
protection
circuit
ON/OFF
circuit Soft start
4
VC
Fig. 1 Test Circuit
VIN
2
A
+ CIN
100µF
0.047µF
1
4 PQ2CF1 3
1kΩ
3
R2
R1
1kΩ
+
20
VO
CO
470µF
L : HK-12S100-9000 (made by Toho Co.)
D : ERC80-004 (made by Fuji electronics Co.)
Power dissipation PD (W)
ISD
IQS
IO
D
;;
;;
;;
;;
Fig. 2 Power Dissipation vs. Ambient
Temperature
Load
L
90µH
3
COM
15
10
5
PD1 :No heat sink
PD2 :With infinite heat sink
PD2
PD1
0
–20
0
20
40
60
80 100
Ambient temperature Ta (˚C)
Note) Oblique line portion : Overheat protection may operate in this area.
Chopper Regulators
PQ2CF1
Fig. 3 Overcurrent Protection Characteristics
100
15
VIN=5V
Vo=12V
CIN=100µF
Co=470µF
L=90µH
10
90
80
Efficiency η (%)
Output voltage Vo (V)
Fig. 4 Efficiency vs. Input Voltage
5
70
60
50
40
30
VIN=5V
Vo=12V
20
0
0.5
1 1.5 2 2.5 3
Output current Io (A)
10
3.5
0
Fig. 5 Reference Voltage Fluctuation vs.
Junction Temperature
CIN=100µF, Co=470µF
L=90µH, VIN=5V
Vo=12V, Io=0.2A
C=0.47µF, R=1kΩ
0.5
0
–0.5
500
CIN=100µF, Co=470µF
L=90µH, VIN=5V
Vo=12V, C=0.47µF
R=1kΩ
0.4
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–1
–25
–0.5
0
25
50
75
100
Junction temperature Tj (˚C)
1
CIN=100µF, Co=470µF
L=90µH, Io=0.2A,
C=0.47µF, R=1kΩ
0.5
Vo=12V
Vo=24V
0
–0.5
0
5
10
15
Input voltage VIN (V)
0
125
Fig. 7 Line Regulation vs. Input Voltage
Line regulation RegI (%)
0.5
20
0.1 0.2 0.3 0.4 0.5 0.6 0.7
Output current Io (A)
Fig. 8 Oscillation Frequency Fluctuation vs.
Junction Temperature
Oscillation frequency fluctuation (%)
Reference voltage fluctuation (mV)
1
100
200
300
400
Output current Io (mA)
Fig. 6 Load Regulation vs. Output current
Load regulation RegL (%)
0
10
5
0
–5
–10
–15
–25
CIN=100µF, Co=470µF
L=90µH, VIN=5V
Vo=12V, Io=0.2A
C=1µF, R=1kΩ
0
25
50
75
100
Junction temperature Tj (˚C)
125
Chopper Regulators
PQ2CF1
Fig. 9 Threshold Voltage vs. Junction
Temperature
Threshold voltage VTH(ON), VTHL (V)
1
0.9
0.8
VTHL
0.7
0.6
0.5
0.4
VTH(ON)
0.3
0.2
0.1
0
–25
0
25 50 75 100 125 150
Junction temperature Tj (˚C)
■ Step - Up Type Circuit Diagram (12V Output)
CIN
100µF
+
2
R2
8.56kΩ
1
+
5
4
1kΩ
VIN
5V
IO
D
0.47µF
3
R1
1kΩ
VO12V
Load
L
90µH
CO
470µF
ON/OFF control
■ Flyback Method Circuit Diagram
IO
D
VO
2
+
VIN
0.47µF
1kΩ
R2
1
5
4
3
R1
1kΩ
+
CO
470µF
Load
CIN
100µF
NOTICE
●
The circuit application examples in this publication are provided to explain representative applications of SHARP
devices and are not intended to guarantee any circuit design or license any intellectual property rights. SHARP takes
no responsibility for any problems related to any intellectual property right of a third party resulting from the use of
SHARP's devices.
●
Contact SHARP in order to obtain the latest device specification sheets before using any SHARP device. SHARP
reserves the right to make changes in the specifications, characteristics, data, materials, structure, and other contents
described herein at any time without notice in order to improve design or reliability. Manufacturing locations are
also subject to change without notice.
●
Observe the following points when using any devices in this publication. SHARP takes no responsibility for damage
caused by improper use of the devices which does not meet the conditions and absolute maximum ratings to be used
specified in the relevant specification sheet nor meet the following conditions:
(i) The devices in this publication are designed for use in general electronic equipment designs such as:
- - - Personal computers
- -- Office automation equipment
- -- Telecommunication equipment [terminal]
- - - Test and measurement equipment
- - - Industrial control
- -- Audio visual equipment
- -- Consumer electronics
(ii) Measures such as fail-safe function and redundant design should be taken to ensure reliability and safety when
SHARP devices are used for or in connection with equipment that requires higher reliability such as:
- -- Transportation control and safety equipment (i.e., aircraft, trains, automobiles, etc.)
- - - Traffic signals
- - - Gas leakage sensor breakers
- - - Alarm equipment
- -- Various safety devices, etc.
(iii)SHARP devices shall not be used for or in connection with equipment that requires an extremely high level of
reliability and safety such as:
- - - Space applications
- -- Telecommunication equipment [trunk lines]
- -- Nuclear power control equipment
- -- Medical and other life support equipment (e.g., scuba).
●
Contact a SHARP representative in advance when intending to use SHARP devices for any "specific" applications
other than those recommended by SHARP or when it is unclear which category mentioned above controls the
intended use.
●
If the SHARP devices listed in this publication fall within the scope of strategic products described in the Foreign
Exchange and Foreign Trade Control Law of Japan, it is necessary to obtain approval to export such SHARP devices.
●
This publication is the proprietary product of SHARP and is copyrighted, with all rights reserved. Under the copyright
laws, no part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, for any purpose, in whole or in part, without the express written permission of SHARP. Express written
permission is also required before any use of this publication may be made by a third party.
●
Contact and consult with a SHARP representative if there are any questions about the contents of this publication.