Revision 1.6

12 - 20

AS3834

Datasheet - D e t a i l e d D e s c r i p t i o n

Following equations can be derived for adjusting the threshold voltages:

8.3.2

Overtemperature Shutdown

all blocks are turned on again.

8.3.3

Short LED protection

Figure 12. Short Led protection

Subsequently the fault output is activated (xFAULT = 0) and the corresponding output is deactivated.

V

DDH_UVH

V

UVLO

1

R

UV LO

1

R

UV LO

2

-------------------

+









×

=

(EQ 4)

Undervoltage lockout HIGH level:

V

DDH_UVL

V

UVLO

1

R

UVLO

1

R

UVLO

2

-------------------

+









×

I

UVLO

R

UVLO

1

×

–

=

(EQ 5)

Undervoltage lockout LOW level:

V

BE

1,2V

0.002

T

J

×

Tj....junction temperature in K

–

=

(EQ 6)