FA5547 데이터 시트보기 (PDF) - Fuji Electric

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FA5547

Switching Power Supply Control IC

Fuji Electric 

FA5546/47

Over load protection(OLP) circuit section (FB pin)

Item

Symbol Conditions

Over load detection

threshold voltage *1

Over load detection

Delay time

Waiting time of auto restart

*1

VthOLP

TdOLP

TdOLP2

VFB=4V

VFB=4V

FA5546

MIN TYP MAX Unit

2.4

2.8

3.2

V

170

200

230

ms

1200 1400 1600

ms

Current sense section (IS pin)

Item

Symbol Conditions

Voltage gain

AvIS ΔVFB/ΔVIS

Maximum threshold

voltage

Over load detection

threshold voltage *1

VthIS1 VFB=3V

VthIS2 VFB=VthOLP

Input bias current

IIS VIS=0V

Minimum ON pulse width

Tmin

Steady

Start/Restart

Delay to output *1

TpdIS Tj=25℃

MIN TYP MAX Unit

-3.5

-3.0

-2.5

V/V

-1.05 -0.95 -0.85

V

-0.70 -0.63 -0.56

V

-50

-40

-30

uA

950 1250 1500

ns

180

280

380

ns

50

200

300

ns

VCC circuit section (VCC pin)

Item

Start-up threshold voltage

Symbol Conditions

VCCon

Shutdown threshold voltage VCCoff

Hysteresis width

VCC over-voltage protection

threshold voltage

Vhys

Vthovp Tj=25℃

Output circuit section (OUT pin)

Item

Low output voltage

High output voltage *1

Rise time *1

Fall time *1

Symbol

VOL

VOH

tr

tf

Conditions

IOL=100mA,

VCC=18V

IOH= -100mA,

VCC=18V

CL=1000pF,

Tj=25℃

CL=1000pF ,

Tj=25℃

MIN TYP MAX Unit

16

18

20

V

8.8

9.8

10.8

V

6.8

8.2

9.6

V

25

26

27

V

MIN TYP MAX Unit

0.5

1.0

2.0

V

(14.5) (16)

17

V

30

60

100

ns

20

40

70

ns

Fuji Electric Co., Ltd.

AN-027E Rev.0.4

April -2011

8

http://www.fujielectric.co.jp/products/semiconductor/

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