KA2S0680B-TU 查看數據表（PDF） - Fairchild Semiconductor

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KA2S0680B-TU

Fairchild Power Switch(FPS)

Fairchild Semiconductor 

KA2S0680B

Electrical Characteristics (CONTROL part)

(Ta=25°C unless otherwise specified)

Parameter

Symbol

Condition

Min.

UVLO SECTION

Start threshold voltage

VSTART

-

14

Stop threshold voltage

VSTOP After turn on

9

OSCILLATOR SECTION

Initial accuracy

FOSC Ta=25°C

18

Frequency change with temperature (2) ∆F/∆T −25°C ≤ Ta ≤ +85°C

-

Maximum duty cycle

Dmax

-

92

FEEDBACK SECTION

Feedback source current

IFB

Ta=25°C, Vfb=GND

0.7

Shutdown Feedback voltage

Shutdown delay current

VSD

Idelay

-

6.9

Ta=25°C, 5V ≤ Vfb ≤ VSD 1.4

SYNC. & SOFT START SECTION

Soft start voltage

VSS

VFB=2V

4.7

Soft start current

Sync threshold voltage (3)

ISS

Sync & S/S=GND

0.8

VSYTH Vfb=5V

6.0

REFERENCE SECTION

Output voltage (1)

Temperature Stability (1)(2)

Vref Ta=25°C

4.80

Vref/∆T −25°C ≤ Ta ≤ +85°C

-

CURRENT LIMIT (SELF-PROTECTION) SECTION

Peak Current Limit

IOVER Max. inductor current

3.52

PROTECTION SECTION

Thermal shutdown temperature (Tj) (1)

TSD

-

140

Over voltage protection voltage

VOVP

-

23

TOTAL DEVICE SECTION

Start Up current

ISTART VCC=14V

0.1

Operating supply current

(control part only)

IOP

Ta=25°C

6

VCC zener voltage

VZ

ICC=20mA

30

Typ.

15

10

20

±5

95

0.9

7.5

1.8

5.0

1.0

6.4

5.00

0.3

4.00

160

25

0.3

12

32.5

Max. Unit

16

V

11

V

22 kHz

±10 %

98

%

1.1 mA

8.1

V

2.2 µA

5.3

V

1.2 mA

6.8

V

5.20 V

0.6 mV/°C

4.48 A

-

°C

28

V

0.55 mA

18 mA

35

V

Note:

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

2. These parameters, although guaranteed, are tested in EDS (wafer test) process

3. The amplitude of the sync. pulse is recommended to be between 2V and 3V for stable sync. function.

4

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