KA3S0880RB/KA3S0880RFB

4

Electrical Characteristics (Control part)

(Ta=25

°C unless otherwise specified)

Notes:

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.

Parameter

Symbol

Condition

Min.

Typ.

Max.

Unit

UVLO SECTION

Start threshold voltage

-14

15

16

V

Stop threshold voltage

After turn on

9

10

11

V

OSCILLATOR SECTION

Initial accuracy

Ta=25

°C18

20

22

kHz

∆F/∆T

−25°C≤Ta≤+85°C-

±5

±10

%

Maximum duty cycle

Dmax

-

92

95

98

%

FEEDBACK SECTION

Feedback source current

Ta=25

°C, Vfb=GND

0.7

0.9

1.1

mA

Shutdown Feedback voltage

-6.9

7.5

8.1

V

Shutdown delay current

Idelay

Ta=25

1.4

1.8

2.2

µA

SYNC. & SOFT START SECTION

Soft start voltage

4.7

5.0

5.3

V

Soft start current

Sync & S/S=GND

0.8

1.0

1.2

mA

Vfb=5V

6.0

6.4

6.8

V

REFERENCE SECTION

Vref

Ta=25

°C

4.80

5.00

5.20

V

Vref/

∆T

−25°C≤Ta≤+85°C-

0.3

0.6

mV/

°C

CURRENT LIMIT (SELF-PROTECTION) SECTION

Peak Current Limit

Max. inductor current

4.40

5.00

5.60

A

PROTECTION SECTION

-

140

160

-

°C

Over voltage protection voltage

-23

25

28

V

TOTAL DEVICE SECTION

Start Up current

0.1

0.3

0.55

mA

Operating supply current

(control part only)

Ta=25

°C

6

12

18

mA

30

32.5

35

V