XDP710 datasheet(40/85 Pages) INFINEON

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Table 18

(continued) START_ILIM current limit

START_ILIM[2:0]

Start-up current limit (IST)

101

37.5% of OC level

110

25% of OC level

111

12.5% of OC level

In AADM, the default OC range and the start-up current limit (IST) through the FET can be set by means of a

voltage on IST pin. If settings different than the ones in Table 19 are desired, they can be configured manually in

the corresponding PMBus commands.

Table 19

IST pin configuration

IST pin voltage, V

OC level, mV

Start-up current limit (IST)

IST > 2.8 (Open)

Set by START_ILIM bits in

I_SNS_CFG command

2.2 < IST ≤ 2.8

50% of OC level (25mV)

1.7 < IST ≤ 2.2

25% of OC level (25mV)

1.3 < IST ≤ 1.7

12.5% of OC level (25mV)

0.9 < IST ≤ 1.3

12.5

12.5% of OC level (12.5mV)

0.6 < IST ≤ 0.9

25% of OC level (12.5mV)

0.3 < IST ≤ 0.6

50% of OC level (12.5mV)

IST ≤ 0.3 (GND)

Set by START_ILIM bits in

I_SNS_CFG command

Setting the voltage level (between 0.3 V and 2.8 V) at IST pin shall be done using external resistor connected to

GND.

To set the desired voltage level at the pin, choose the resistor by simply dividing desired voltage over sourced

pin current (100

μA±7%).

The 1% (or lower) tolerant resistors are recommended in this case. For example:

Table 20

IST pin resistor

Voltage, V

IST pin resistor, k

2.49

24.9

1.96

19.6

1.5

1.1

0.75

7.5

0.453

4.53

XDP710 Hot-swap Controller

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

4 Product Features

Datasheet

Rev. 2.0

2022-11-22

XDP710 Datasheet(PDF) 40 Page - Infineon Technologies AG

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