9

UCC15701/2

UCC25701/2

UCC35701/2

UNITRODE CORPORATION

7 CONTINENTAL BLVD. • MERRIMACK, NH 03054

TEL. (603) 424-2410 • FAX (603) 424-3460

6

7

10

9

11

14

1

12

8

13

3

4

2

5

VFF

SLOPE

RAMP

ISET

FREQ

SS

COUNT

VREF

FB

GND

PGND

OUT

VDD

ILIM

R5

C1

C2

R8

R

GND

R

SNS

R9

C4

R6

R7

C3

R1

R2

R3

R4

C

R

C

T

R

T

C

F

R

F

C

SS

UCC3570

V

IN+

6

7

10

9

11

14

1

12

8

13

3

4

2

5

VFF

RT

CT

VSCLAMP

SYNC

SS

COUNT

VREF

FB

GND

PGND

OUT

VDD

ILIM

R5

C1

C2

R8

R

GND

R9

R7

C3

R1

R2

R3

R4

C

T

R

NEW

C

F

R

F

C

SS

UCC35701

V

IN+

R12

C6

C5

R11

R13

C7

R14

V

OUT

R12

C6

C5

R11

R13

C7

R14

V

OUT

V

OUT

R

SNS

V

OUT

R6

C4

R15

R15

Figure 6. Single-ended forward circuit comparison between UCC3750 and UCC37501.

APPLICATION INFORMATION (cont.)

UDG-98210