LD5530

13

Leadtrend Technology Corporation

LD5530-DS-00

Oct. 2013

saturation; it would cause damage for acting beyond the

maximum safety operating area. It

’s necessary to check

the characteristic of MOSFET.

VDS

ID

Ohmic Region

Saturation Region

VGS1

VGS2

VGS3

VGS4

VGS5

VGS5 > VGS4 > VGS3 > VGS2 > VGS1

Cut-off region

Fig. 22

Output Short Circuit Protection (OSCP)

–

Auto Recovery

The OSCP function is to prevent the damage from output

immediately. And according to the close loop control,

COMP voltage will pull high in the meanwhile. If the

VCOMP pulls high to over 4.5 V for over 15 ms and Vcc

drops below 9 V. At this time, the OSCP protection will be

triggered and turn off the gate driving.