STUSB4500 datasheet(19/41 Pages) STMICROELECTRONICS

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Parameter name

Parameter description

Reset

value

(default)

Value

Description

I_SNK_PDO2

Current value for SNK_PDO2

0101b

(1.5 A)

0000b

I_SNK_PDO_LUT[3:0] flexible current

value from look-up table (see Table

17. Look-up table for sink PDO current

configuration)

0001b

1111b

I_SNK_PDO_LUT[3:0] pre-defined

current values from look-up table (see

Table 17. Look-up table for sink PDO

current configuration)

I_SNK_PDO3

Current value for SNK_PDO3

0011b

(1.0 A)

0000b

I_SNK_PDO_LUT[3:0] flexible current

value from look-up table (see Table

17. Look-up table for sink PDO current

configuration)

0001b

1111b

I_SNK_PDO_LUT[3:0] pre-defined

current values from look-up table (see

Table 17. Look-up table for sink PDO

current configuration)

I_SNK_PDO_FLEX

Flexible current value

common to all PDOs

0.01*200

(2.0 A)

0.01*1

0.01*500

Flexible current value

10 mA ≤ 0.01*I_SNK_PDO_FLEX[9:0]

≤ 5A by steps of 10 mA

Default I_SNK_PDO_FLEX[9:0] =

0011001000 (see Table 17. Look-up

table for sink PDO current

configuration)

SHIFT_VBUS_HL1

Coefficient to shift up nominal

VBUS high voltage limit

applicable to 5 V and

SNK_PDO1 voltage

1010b

(10%)

0001b

1111b

1% ≤ VSHUSBH1 ≤ 15% of VBUS by

increment of 1%

Default VSHUSBH1 = 10%

SHIFT_VBUS_LL1

Coefficient to shift down

nominal VBUS low voltage

limit applicable to 5 V and

SNK_PDO1 voltage

1111b

(15%)

0001b

1111b

1% ≤ VSHUSBL1 ≤ 15% of VBUS by

increment of 1%

Default VSHUSBL1 = 15%

SHIFT_VBUS_HL2

Coefficient to shift up nominal

VBUS high voltage limit

applicable to SNK_PDO2

voltage

0101b

(5%)

0001b

1111b

1% ≤ VSHUSBH2 ≤ 15% of VBUS by

increment of 1%

Default VSHUSBH2 = 5%

SHIFT_VBUS_LL2

Coefficient to shift down

nominal VBUS applicable to

SNK_PDO2 voltage

1111b

(15%)

0001b

1111b

1% ≤ VSHUSBL2 ≤ 15% of VBUS by

increment of 1%

Default VSHUSBL2 = 15%

SHIFT_VBUS_HL3

Coefficient to shift up nominal

VBUS high voltage limit

applicable to SNK_PDO3

voltage

0101b

(5%)

0001b

1111b

1% ≤ VSHUSBH3 ≤ 15% of VBUS by

increment of 1%

Default VSHUSBH3 = 5%

SHIFT_VBUS_LL3

Coefficient to shift down

nominal VBUS low voltage

limit applicable to

SNK_PDO3 voltage

1111b

(15%)

0001b

1111b

1% ≤ VSHUSBL3 ≤ 15% of VBUS by

increment of 1%

Default VSHUSBL3 = 15%

VBUS_DISCH_TIME_TO_0V

Coefficient used to compute

VBUS discharge time to 0V

1001b

(9)

0001b

1111b

1 ≤ TDISPAR0V ≤ 15 by increment of 1

Unit discharge time: 84 ms (typ.)

Default coefficient TDISPAR0V = 9,

discharge time TDISUSB0V = 756 ms

STUSB4500

Default start-up configuration

DS12499 - Rev 2

page 19/41

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