STUSB4761 datasheet(8/29 Pages) STMICROELECTRONICS

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Table 4. Ambient temperature adaptive power and protection

Rising threshold

Hysteresis

Behavior

Re-start

< 70 °C

Default power profile (PDP_default)

70 °C

10 °C

Temperature safe profile

(PDP_OTP)

New PDO applied with same

voltage but reduced current value.

Customer or application dependent

New negotiation with PDP_OTP

power profile

90 °C

10 °C

Power safe profile (PDP_OTP_div2)

For every PDO, the current of

the previous profile (PDP_OTP) is

divided by 2

New negotiation with

PDP_OTP_div2 power profile

110 °C

10 °C

Alert

Abort negotiation and disconnect.

FAULT signal asserted

VBUS switch open.

The application does not re-start

unless:

VDD goes below POR

threshold

Temperature decreases below

T1. In case same error

occurs again, condition 1)

becomes the only valid re-

start condition

Figure 3. OTP_FSM

Temperature safe profile:

PDP_OTP(1)

T > T1

T1 -10 C < T <T2

T >T2

T< T1 –10 C

Power safe profile:

PDP_OTP_div2(2)

T >T3

T < T2–10 C

SHUT DOWN

T < T1– 10 C (works once)

Or un-plug

Power-ON

T < T1

default power profile:

PDP_default(1)

T2 -10 C < T <T3

STUSB4761

Ambient temperature adaptive power and protection

DS13141 - Rev 3

page 8/29

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