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

η

fo

∆fo

V

V

%

%

%

%

kHz

%

%

A

µA

µA

V

V

V

V

µA

mA

-

-

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

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

Note) Oblique line portion : Overheat

protection may operate in this area.

100

µF

0.047

µF

470

µF

1k

Ω

+

+

q

3

q

1

q

2

q

4

q

5

A

L

90

µH

L : HK-12S100-9000 (made by Toho Co.)

D : ERC80-004 (made by Fuji electronics Co.)

D

PQ2CF1

1k

Ω

s Block Diagram

+

-

+

-

F/F

Q

R

S

Voltage

regulator

circuit

COMP.

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