SG2524, SG3524

REGULATING PULSEWIDTH MODULATORS

SLVS077D – APRIL 1977 – REVISED FEBRUARY 2003

13

POST OFFICE BOX 655303

Input Return

0.1

Ω

3 k

Ω

1N3880

500

µF

1 A

5 V

0.9 mH

TIP115

SG2524

VCC

OSC OUT

GND

VCC = 28 V

0.001

µF

50 k

Ω

5 k

Ω

3 k

Ω

0.1

µF

0.02

µF

5 k

Ω

CURR LIM+

EMIT 2

COL 2

COL 1

EMIT 1

SHUT

DOWN

CT

RT

REF OUT

IN+

IN–

CURR LIM–

COMP

1

2

16

6

7

10

3

11

12

13

14

4

5

9

15

8

5 k

Ω

5 k

Ω

+

Figure 14. Single-Ended LC Circuit

5 k

Ω

0.01

µF

0.1

µF

2 k

Ω

5 k

Ω

20 k

Ω

1500

µF

0.1

Ω

100

µF

+

–

5 A

5 V

20T

20T

5T

5T

TIR101A

1 mH

TIP31A

100

Ω

100

Ω

TIP31A

1W

1 k

Ω

VCC = 28 V

GND

OSC OUT

VCC

SG2524

CURR LIM+

EMIT 2

COL 2

COL 1

EMIT 1

SHUT

DOWN

CT

RT

REF OUT

IN+

IN–

CURR LIM–

COMP

1

2

16

6

7

10

3

11

12

13

14

4

5

9

15

8

5 k

Ω

5 k

Ω

0.001

µF

+

+

1W

1 k

Ω

Figure 15. Push-Pull Transformer-Coupled Circuit

†Throughout these discussions, references to the SG2524 apply also to the SG3524.