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Rev.1.4 Oct.04, 2019

AX3015

OVP

The Over Voltage sense pin, If VOVP >1.25V, the OVP is happened that it can turn-off

the driver. You can set VOUT OVP voltage by outside resistances (R3 and R4), Please see

below formula to set.

)

(

.

)

(

4

3

1

25

1

R

R

VOUT

OVP







EN/CT

The pin is enable/shutdown and auto restart control functions. When system is

normal operating, this pin is enable/shutdown function. Pulling this pin below a threshold

voltage of under 0.3V shuts the regulator off, and pulling this pin from 0.5V to 1.5V turns

the regulator on. However when VOUT is short (VFB<0.4V), the auto restart function can be

started that restart the regulator cycle by cycle. The cycle time is set by outside capacitor

(C6). Please refer the below waveform and formula, the t2 cycle is regulator off time and t1

cycle is current limit time. The charge-current is 30uA and discharge-current is 1.3uA.

VEN/CT

Time

t1

t2

Time

Iin (A)

0.5V

1.5V

0

Current Limit

.)

(

.

t

.)

(

t

Sec

u

C

Sec

u

C

3

1

1

6

2

30

1

6

1







