HUSB238A

Datasheet

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Page 12 of 22

Table 8. SNK_VSET Setting

RSNK_VSET (kΩ)

Preferred Voltage (V)

0

5

3

9

6.04

12

11

15

19.1

20

Open

28 (if EPR_CAP_SNK=0b, then 20)

The RDO voltage of the HUSB238A is determined by the lower value between SNK_VSET and SNK_PDO2_VOLTAGE.

SNK_PDO2_VOLTAGE is programmable by internal fuse options and the default value is 20V. The requested voltage

value can be changed dynamically with the resistance value change in GPIO mode.

SNK_ISET PIN

This pin is used to set the request current when the HUSB238A connected as a Sink. This pin is pulled up internally.

Connect a resister with 1% tolerance between SNK_ISET and GND to indicate the ISET_CURRENT value as shown

in Table 9.

Table 9. SNK_ISET Setting

RSNK_ISET (kΩ)

Preferred CURERNT (A)

0

1.25

2.26

1.5

4.02

1.75

6.04

2

8.45

2.25

11.5

2.5

15.8

2.75

21

3

Open

3.25

The RDO current of the HUSB238A is determined by the lower value between ISET_CURRENT and

SNK_PDO2_CURRENT. SNK_PDO2_CURRENT is programmable by internal fuse options and the default value is

3.25A. The requested current value can be changed dynamically with the resistance value change in GPIO mode.

DIGITAL PINS

There are two additional digital pins for extended application. The two pins are FLGIN and FAULT/OUT2.

FAULT/OUT2

The FAULT/OUT2 pin is a digital output pin. It can be assigned as several functions selected by OUT2_SEL.

Fault Indication: Output Low in default. The HUSB238A pulls this pin high in several cases:



There is not any available PDO in Source Capabilities Message to cover the RDO request voltage or current.



Stays in Fault state.

The Fault Indication is reset after an initialization, SW_RES, change of OUT2_SEL, or Hard Reset command.

ID Indication: This pin indicates connection state.

Table 10. ID Indication Definition

ID Status

Description

Low

Attached as a Source

High-Z

Attached as a Sink or unattached

General Output2: The output state can be control by writing EN_OUT2. I2C master can write the EN_OUT2 bit to

change the output state.

Please note that, this digital output pin is Hi-Z during initialization. The output polarity can be changed by FLG_

POLARITY.