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Axelite Confidential Materials, do not copy or distribute without written consent.

Rev1.5 Dec.11, 2019

AX3075/B

Soft Start

The AX3075/B has internal soft start function to control rise rate of the output voltage

and limits the large inrush current at start up. The typical soft start interval is about 3mS.

Power on Reset

A power-on reset circuit monitors the input voltage. When the input voltage exceeds

7.5V, the converter will start operation. Once input voltage falls below 6.5V, the controller

will shut down.

Over Temperature Protection

The AX3075/B provides over temperature protection. The OTP will shut down the

converter when junction temperature exceeds 160°C. Once the junction temperature cools

down by approximately 40°C, the converter will resume normal operation.

Current Limit Protection

The Current limit is set by outside resistance (RSENSE), When the SEN1 or SEN2

voltage larger than 100mV, the current limit is happened that driver can be turned off. The

current limit set according to the following equation:

SENSE

R

mV

100

=

(A)

Limit

Current

Output Short-Circuit Protection

The AX3075/B provides output short-circuit protection function. 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 internal counter.

t1

t2

.)

(

500

2

t

.)

(

50

1

t

Sec

m

Sec

m



