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Rev.1.4 Oct.16, 2019

AX3304/A



APPLICATION CIRCUIT

C2

0.1uF

R2

12K

R5

3K

C1

470uF

R1

0R

5V/3A

R4

Option

C6

Option

R3

12K

R6

3K

RSENSE1

38mR

ICL =

115mV / Rsense

C5

Option

VCC 10~36V

U1

P-MOS

5

1

6

7

8

2

3

L1

66uH / 33uH

C3

0.1uF

C7

0.1uF

U2

AX3304/A

1

2

3

4

5

6

7

8

EN/CT

GND

VGATE

VCC

GATE

VSENSE

OVP

FB

D1

B340A

C4

470uF



FUNCTION DESCRIPTIONS

FB

Sense the regulated output voltage to complete the feedback loop, when VFB <0.4V,

the SCP is happened.

VSENSE

The current limit sense pin, if VIN-VSENSE≧115mV, the over current is happened that it

can turn-off driver cycle by cycle.

OVP

The Over Voltage sense pin, If VOVP >1.23V, 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.

)

5

R

2

R

+

1

(

×

23

.

1

=

VOUT

)

OVP

(

The Over Voltage Protect, If VOVP >1.23V, the OVP is happened that it can turn-off the

driver.

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 falls below 6.0V.