5/13

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

Rev.1.4 Oct.16, 2019

AX3304/A

Thermal Considerations

The SOP-8L package needs a heat sink under most conditions. The heat sink

connect exposed pad of AX3304/A to obtain best effect. The size of the heat sink depends

on the input voltage, output voltage, output current and ambient temperature.



APPLICATION INFORMATION

Setting the Output Voltage

Application circuit item shows the basic application circuit with adjustable output

version. The external resistor sets the output voltage according to the following equation:

VOUT = 1.0V × (1+

6

R

3

R

)

Table 1 Resistor select for output voltage setting

VOUT

R6

R3

5.0V

3K

12K

3.3V

3K6

8K2

Current Limit Protection

The Current limit is set by external resistor (RSENSE), When the VSENSE pin voltage

small than VCC 115mV, the current limit is happened that driver can be turned off. Refer to

the following equation for set up current limit:

SENSE

R

mV

115

=

(A)

Limit

Current

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

RSENSE (Ω)

Current Limit (A)

Maximum Output Current (A)

29m

3.96

3.7

38m

3.03

3.0

54m

2.13

1.9