4-173

TELCOM SEMICONDUCTOR, INC.

7

6

5

4

3

1

2

8

TC426

TC427

TC428

1.5A DUAL HIGH-SPEED

POWER MOSFET DRIVERS

OUTPUT

INPUT

0.1

µF

VDD

+5V

INPUT

10%

90%

10%

90%

10%

90%

18V

OUTPUT

tD1

t F

t

tD2

C = 1000pF

L

1

µF

= 18V

0V

0V

TC426

(1/2 TC428)

1

2

R

INPUT: 100kHz,

square wave,

tRISE = tFALL ≤ 10nsec

OUTPUT

INPUT

90%

10%

10%

10%

tD1

tR

tD2

tF

90%

C = 1000pF

L

TC427

(1/2 TC428)

+5V

INPUT

18V

OUTPUT

0V

0V

90%

1

2

0.1

µF

VDD

1

µF

= 18V

INPUT: 100kHz,

square wave,

tRISE = tFALL ≤ 10nsec

VOLTAGE INVERTER

+ 15V

0.1

µF

4.7

µF

10

µF

47

µF

+

–

+–

1N4001

1N4001

VOUT

f

= 10kHz

IN

2

6

3

7

1/2

TC426

+–

-6

-8

-10

-12

0

10 20 30 40 50 60 70 80 90

I

(mA)

OUT

-7

-9

-11

-13

-5

-14

100

+ 15V

0.1

µF

4.7

µF

10

µF

47

µF

+

–

+

–

+

–

1N4001

1N4001

VOUT

f

= 10kHz

IN

2

6

3

7

29.

27.

25.

23.

0

10

20 30 40 50 60 70 80 90

I

(mA)

OUT

28.

26.

24.

22.

30.

100

1/2

TC426

Test Figure 1. Inverting Driver Switching Time Test Circuit

Test Figure 2. Noninverting Driver Switching Time Test Circuit

VOLTAGE DOUBLER