STK672-442BN-E

No.A2249-5/28

Measurement Circuit

(The terminal which is not appointed is open. The measurement circuit of STK672-440BN-E is the

same as STK672-442BN-E.)

Vsat

IIH,IIL,IIB,ILF

VDD

Start

2V

GND

RL

23Ω

24V

1

2

3

4

5

6

9

11

12

13

14

15

17

18

19

10

V

STK672-

442BN-E

Vsat

VDD

GND

IIH

IIL

1V

9

18

A

A

IIB

MODE1

MODE2

MODE3

CLOCK

CWB

RESETB

FAULT1

VREF

ILF

A

11

12

13

14

16

17

19

10

STK672-

442BN-E

ENABLE

15

Vdf

Icco,Ioave,fc,VOLF

GND

IF=1A

GND

VDD

Start

ENABLE

VDD

7.5kΩ

1kΩ

910Ω

Icco

VOLF

GND

SW3

24V

SW2

SW1

a

b

a

b

SW4

Ioave

0.62mH

1Ω

1Ω

23Ω

23Ω

fc

2

V

V

6

9

11

12

14

15

16

17

19

10

1

2

3

4

5

6

A

9

18

1

3

4

5

STK672-

442BN-E

V

Vdf

24V

100μF

STK672-

442BN-E

Ioave measurement : Set switch SW2 in the setting SW1 to ‘b’.

fc measurement : Set switch SW3 in the setting SW1 to ‘a’.

Icco measurement : Set ENABLE low.

VOLF measurement : Set SW4‘on’in the Ioave measurement condition.