Sharp PQ1CF1 Datasheet

Chopper Regulators PQ1CF1

PQ1CF1

TO-220 Package Chopper Regulator

■ Features

¡Maximum switching current : 3.5A
¡With ON/OFF control function
¡Built-in oscillation circuit

(oscillation frequency : TYP.70kHz)

¡Built-in overheat protection, overcurrent protection function
¡Variable output voltage (1.26 to 35V /-1.26 to -30V)

[Possible to choose step down output/inversing output according

to external connection circuit]

■ Applications

¡Facsimiles
¡Printers
¡Switching power supplies
¡Personal computers

■ Outline Dimensions

10.2MAX

φ3.2±0.1

7.4±0.2

PQ1CF1

(24.6)

5-0.8±0.1

4-(1.7)

●1●2 ●3●4 ●5

3.6±0.2

(1.5)

(0.5)

1 VIN
2 VOUT
3 COM

ADJ

4 O
5 VC

4.5±0.2

(5.0)

8.2±0.7

(Unit : mm)

2.8±0.2

16.4±0.7

2.0

5.0±0.5

4.4MIN

3.2±0.5

■ Absolute Maximum Ratings

*1

Input voltage
Error input voltage
Input-output voltage

*2

Output-COM voltage

*3

ON/OFF control voltage
Switching current terminal voltage
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

V

IN

V

ADJ

Vi-o

OUT

V

V

C

SW

D1
D2

T

j
opr
stg

sol

-0.3 to 40

-20 to +80

-40 to +150

260 (For 10s)

IN

terminal and COM terminal.

OUT

terminal and COM terminal.

C

terminal and COM terminal.

j

=<150˚C

I
P
P

T

T
T

(Ta=25˚C)

40

7

41

-1

V
V
V
V
V

3.5

1.5
15

150

A
W
W
˚C
˚C
˚C
˚C

· Please refer to the chapter“ Handling Precautions ”.

Chopper Regulators PQ1CF1

■ Electrical Characteristics

Parameter Symbol Conditions UnitMAX.TYP.MIN.
Output saturation voltage
Reference voltage
Temperature coefficient in reference voltage
Load regulation
Line regulation
Efficiency
Oscillation frequency
Oscillation frequency temperature fluctuation
Maximum duty
Overcurrent detecting level
Charge current1
Charge current2

Input threshold voltage
On threshold voltage

Stand-by current
Output OFF-state consumption current

■ Block Diagram

1 V

IN

Voltage

regulator

circuit

PWM COMP.

Overcurrent

detecting

circuit

Overheat
detecting

circuit

F/F

Q

R

S

(Unless otherwise specified, conditions shall be VIN=12V, Io=0.5A, VO=5V, Ta=25˚C)

I

SW=

V

SAT

V

ref

∆V

ref

|RegL|

eg

I|

|R

η

fo

∆fo

MAX

D

I

L

I

CHG1

I

CHG2

V

THL

V

THH

VTH(ON)

SD

I
I

qS

ON/OFF

circuit

+

-

Oscillator

3A

-

j

=0 to 125˚C

T

O

=0.5 to 3A

I

IN

=8 to 35V

V

O

=3A

I

-

j

=0 to 125˚C

T
4terminal is open

-

24terminal is open, 5terminal
24terminal is open, 5terminal=0.7V

Duty

=0%, 4terminal=0V, 5terminal

Duty=D

MAX

, 4terminal is open,5terminal

4terminal=0V, 5terminal

IN

=40V, 5terminal=0V

V

IN

=40V, 5terminal=0.7V

V

2 V

OUT

↓

Soft start

4 O

ERROR AMP.

+

-

V

ref

ADJ

-

1.235

-

-

-

-

60

-

90

3.9

-50

-150

0.75

1.55

0.5

-

-

1.4

1.26
±0.6

0.2

0.6
80
70
±5

-

5.1

-30

-100

0.9

1.8

0.6

140

8

1.8

1.285

-

1.5

2.5

-

80

-

-

6.3

-10

-50

1.2

2.05

0.7

400

16

V

V
%
%
%
%

kHz

%
%

A

µA
µA

V

V

V

µA

mA

Fig.1 Test Circuit

IN

C
220µF

●4

●1 ●2

PQ1CF1

●3

0.068µF

I

SD

I

QS

A

V

IN

3 COM

L
90µH

R

●5

5.1kΩ

L : HK-12S120-9000R (made by Toho Co.)
D : ERC80-004 (made by Fuji electronics Co.)

2

D

R

1

1kΩ

I

++

C

O

1000µF

5 V

O

C

V

Fig.2 Power Dissipation vs. Ambient

Temperature

20

15

(W)

O

Load

D

10

5

Power dissipation P

0

-20 0 20 40 60 10080

protection may operate in this area.

D1

:No heat sink

P
P

D2

:With infinite heat sink

D2

P

P

D1

Ambient temperature Ta (˚C)

Note) Oblique line portion : Overheat