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Rev.1.5 Oct.15, 2019

AX3117

VEN/CT

Time

t1

t2

Time

Iin (A)

0.5V

1.5V

0

Current Limit

.)

Sec

(

u

8

.

1

1

×

10

C

=

2

t

.)

Sec

(

u

26

1

×

10

C

=

1

t

Under Voltage Lockout (UVLO)

To avoid error-operation of the device at low input voltages an under voltage lockout

is included that disables the device, if the input voltage lower than 5.8V.

Current Limit Protection

The Current limit is set by outside resistance (RSENSE), When the SENSE1-SENSE2

voltage larger than 140mV, the current limit is happened that driver can be turned off until

the drop is small than 90mV. The current limit set according to the following equation:

SENSE

R

×

2

)

mV

0

mV

140

(

+

mV

140

=

(A)

Limit

Current

5

-

The maximum output current table is shown as below; please refer the table to design.

RSENSE (Ω)

Current Limit (A)

50m

2.3

75m

1.53

100m

1.15

Inductor Selection

For most designs, the different frequency can be reducing the inductor value; Please

refer the table below.

L1 recommend value (VIN=10~36V ,VOUT=5V)

Version

AX3117A

AX3117/B

L1 Value (H)

22~47u

66~100u