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

Rev1.5 Dec.11, 2019

AX3075/B



APPLICATION INFORMATION

Output Voltage Setting

Figure1 Output Voltage Setting

Figure 1 shows the connections for setting the output voltage. Select the proper ratio of the

two feedback resistors RFB1 and RFB2 based on the output voltage. Typically, use RFB2 ≈

1kΩ and determine R

FB1 from the following equation:

)

1

－

(

2

1

FB

OUT

FB

FB

V

V

R

R



Output Cable Resistance Compensation

To compensate for resistive voltage drop across the charger's output cable, the

AX3075/B integrates a simple, user-programmable cable voltage drop compensation

using the impedance at the FB pin. Use the curve in Figure 2 to choose the proper

feedback resistance values for cable compensation. RFB1 is the high side resistor of

voltage divider.

The Vsen1 or Vsen2 take the big one.

)]

1

6

.

16

(

[

]

)

1

[(

1

2

1

uA

K

V

R

V

R

R

V

SEN

FB

FB

FB

FB

OUT













Figure2

12VIN to 5VOUT Cable Compensation (RSEN=33mΩ)