KA7552A datasheet(3/6 Pages) FAIRCHILD

No de pièce	KA7552A

Description	SMPS Controller

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Fabricant	FAIRCHILD [Fairchild Semiconductor]

Site Internet	http://www.fairchildsemi.com

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KA7552A/KA7553A

3

Electrical Characteristics (Continued)

(VCC = 18V, FOSC = 135kHz, TA = 25°C, unless otherwise specified)

Note :

1. These parameters, although guaranteed, are not 100% tested in production.

2. Recommend operating condition :

- Vcc(min) = 12V

-RT = 3.3kΩ ~ 10kΩ

- Oscillation frequency = 5kHz ~ 600kHz

- Soft start capacitor(CS) = 0.1uF ~ 1uF

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

UNDER VOLTAGE LOCKOUT SECTION

Start-up threshold voltage

VTH(ST)

-

15.5

16.0

16.5

V

Minimum operating voltage

VOPR(Min)

-

8.20

8.70

9.20

V

Hysteresis

VHYS

-

6.40

7.30

8.20

V

ON/OFF CONTROL SECTION

Source current(pin8)

ISOURCE(CS) VPIN8 = 0V

-15

-10

-5

uA

On threshold voltage

VTH(ON)

VPIN8 : OFF->ON

0.45

0.56

0.70

V

Off threshold voltage

VTH(OFF)

VPIN8 : ON -> OFF

0.30

0.42

0.55

V

OUTPUT SECTION

Low output voltage

VOL

IO = 100mA, VCC = 18V

-

1.3

1.8

V

High output voltage

VOH

IO = -100mA, VCC = 18V

16.0

16.5

18.0

V

Rise time(Note1)

TR

No load

-

50

-

ns

Fall time(Note1)

TF

No load

-

50

-

ns

OVERALL

Stand-by current

ISB

VCC = 14V

-

90

150

uA

Operating current

ICC(OPR)

VPIN2 = 0V

-

9

15

mA

Power supply current off

ICC(OFF)

VPIN8 = 0V

-

1.1

1.8

mA

Power supply current shutdown

ICC(SD)

VPIN8 = 7.6V

-

1.1

1.8

mA

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