XDP710 datasheet(76/85 Pages) INFINEON

Part #	XDP710

Description	Wide input voltage range (5.5 V to 80 V) system monitoring and protection IC

PDF	85 Pages

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Manufacturer	INFINEON [Infineon Technologies AG]

Direct Link	http://www.infineon.com

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76 / 85 page

5.9

Calculating PMBus direct format limits from "real world" values

and vice-versa

Voltage

Voltage limits calculations are straight forward using the formulas and coefficients specified in . As an example,

the VIN_OV_FAULT_LIMIT is taken.

System characteristics and configuration:

VTLM_RNG = 88 V

Based on VTLM_RNG value, from the coefficients table:

m = 4653

b = 0

R = -2

For a VIN_OV_FAULT_LIMIT of 64 V, the following formula is applied:

Y= mX+b *10R

Equation 18

Y= 4653*64+0 *10−2

Equation 19

Y=2978=0xBA2

Equation 20

So the value to be programmed in VIN_OV_FAULT_LIMIT is 0xBA2.

To convert from PMBus direct format to "real world" value, let's suppose the value from the ADC in the

READ_VIN command is 0x8B9 = 2233 decimal. System characteristics, configuration and coefficients are the

same as above. The following formula is applied:

X= 1m* Y*10−R−b

Equation 21

X= 14653* 2233*102−0

Equation 22

X=48V

Equation 23

Current

XDP710 Hot-swap Controller

Wide input voltage range (5.5 V to 80 V) system monitoring and protection IC

5 Application Information

Datasheet

Rev. 2.0

2022-11-22

XDP710 Datasheet(PDF) 76 Page - Infineon Technologies AG