TPS65982ABZBHR datasheet(51/121 Pages) TI1

51 / 121 page

Time (500 Ps/div)

-1

D010

I CC2

C_CC2

PP_CABLE

Time (10 Ps/div)

-4

-2

D009

I CC2

C_CC2

PP_CABLE

TPS65982

www.ti.com

SLVSD02D – MARCH 2015 – REVISED JUNE 2019

Product Folder Links: TPS65982

Submit Documentation Feedback

9.3.3.22 PP_CABLE to C_CC1 and C_CC2 Switch Architecture

Figure 20 shows the switch architecture for the PP_CABLE switch path to the C_CCc pins. Each path provides a

unidirectional current from PP_CABLE to C_CC1 and C_CC2. The switch structure blocks reverse current from

C_CC1 or C_CC2 to PP_CABLE.

9.3.3.23 PP_CABLE to C_CC1 and C_CC2 Current Limit

The PP_CABLE to C_CC1 and C_CC2 share current limiting through a single FET on the PP_CABLE side of the

switch. The current limit ILIMPPCC is adjustable between two levels. When the current exceeds ILIMPPCC, the

current-limit circuit activates. Depending on the severity of the over-current condition, the transient response will

react in one of two ways: Figure 40 and Figure 41 show the approximate response time and clamping

characteristics of the circuit for a hard short while Figure 42 shows the approximate response time and clamping

characteristics for a soft short. The switch does not have reverse current blocking when the switch is enabled

and current is flowing to either C_CC1 or C_CC2.

Figure 40. PP_CABLE to C_CCn Current Limit with a Hard Short

Figure 41. PP_CABLE to C_CCn Current Limit with a Hard Short (Extended Time Base)

TPS65982ABZBHR Datasheet(PDF) 51 Page - Texas Instruments