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Document Number: 67538

S11-0703-Rev. B, 18-Apr-11

Vishay Siliconix

SiC779

This document is subject to change without notice.

TIMING DEFINITIONS

Note:

GH is referenced to the high side source. GL is referenced to the low side source

SiC779 BLOCK DIAGRAM

Region

Definition

Symbol

1

Turn off propagation delay LS

2

Fall time LS

3

Dead time rising

4

Rise time HS

5

Turn off propagation delay HS

6

Fall time HS

7

Dead time falling

8

Rise time LS

PWM

GH

GL

SW

12 3 4

5 6

7

8

10 %

90 %

10 %

90 %

75 %

25 %

Figure 2

20K

V

SWH

P

GND

P

GND

+

-

LG

V

V

+

-

UVLO

Zero-

Current

Detect

V

CIN

V

CIN

DSBL#

PWM

C

GND

Thermal Monitor

and Warning

PWM

Logic

Control

and

State

Machine

Anti-Cross-

Conduction

Control

Logic

SMOD#

GL

V

IN

+

-

V

SWH

GH

BOOT

V

DRV

V

DRV

THDN