Adjusting the power supply using the digital potentiometer AD5254

Power Chip TPS650242RHBR/TPS650243RHBR, one-way fixed output, two DCDC outputs, two ldo outputs.
Digital Potentiometer AD5254 Internal integrated 4-way potentiometer, full-scale has 10k,50k,100k several.

TPS650243RHBR Output voltage Calculation formula:

①vout = Vfbldox * ((RAB)/RWB)

Where:vfbldox = 1.0V

②vout = VDEFDCDCX * ((RAB)/RWB)

WHERE:VDEFDCDCX = 0.6V

AD5254 Resistance Calculation formula

RWB (D) = (d/256) Xrab + 75ω (2)

where
D is the decimal equivalent of the datacontained in the
RDAC latch.
R AB isthe nominal end-to-end resistance

AD5254 Related Register Operation

I²c Address: 0x58

①0x0 x write rdacx d

②0x9 x save rdacx eemem eemem

③increment Rdacs (A1, A0) OneStep

101010xx   ( a1 A0 )  

④decrement Rdacs (A1, A0) OneStep

110100xx ( A1 A0 )   

voltage range and adjustment stepping relationship:

voltage range (v )	Step (mv )
1.0~1.6	<10
1.6~2.2	10~20
2.2~2.7	20~30
2.7~3.1	30~40
3.1~3.5	40~50
3.5~3.9	50~60
3.9~5.0	60~80

Note: Adjust the nonlinear relationship.

Adjusting the power supply using the digital potentiometer AD5254