UCS1003-2 datasheet(56/138 Pages) MICROCHIP

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UCS1003-1/2/3

DS20005346B-page 56

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9.9

Current Limit Mode Associations

The UCS1003-1/2/3 will close the port power switch and

use the Current-Limiting mode, as shown in Table 9-2.

TABLE 9-2:

CURRENT LIMIT MODE OPTIONS

Active Mode

Current Limit Mode

(See Section 10.14 “Current-Limiting Behavior

Configuration Registers”)

Data Pass-Through

Trip mode

BC1.2 SDP

Trip mode

BC1.2 CDP

CC mode if ILIM < 1.68A; otherwise, Trip mode

BC1.2 DCP

CC mode if ILIM < 1.68A; otherwise, Trip mode

DCE Cycle Mode

UCS1003-1

During DCE Cycle, when a charger emulation profile is

being applied and the emulation time-out is active

CC mode if ILIM < 1.68A; otherwise, Trip mode

BC1.2 DCP charger emulation profile accepted or the

emulation time-out is disabled

CC mode if ILIM < 1.68A; otherwise, Trip mode

Legacy 2 charger emulation profile accepted or the

emulation time-out is disabled

CC mode if ILIM < 1.68A; otherwise, Trip mode

Legacy 1 or Legacy 3 – Legacy 7 charger emulation

profile accepted or the emulation time-out is disabled

Trip mode if IBUS_R2MIN < ILIM or ILIM > 1.68A

(normal operation); otherwise, CC mode

(see Register 10-49)(Note 1)

Custom charger emulation profile accepted or the

emulation time-out is disabled

Trip mode if IBUS_R2MIN < ILIM or ILIM > 1.68A

(normal operation); otherwise, CC mode

(see Register 10-49)(Note 1)

No handshake

(DCE Cycle with emulation retry not enabled)

Trip mode if IBUS_R2MIN < ILIM or ILIM > 1.68A

(normal operation); otherwise, CC mode

(see Register 10-49)(Note 1)

UCS1003-2/3

During DCE Cycle, when a charger emulation profile is

being applied and the emulation time-out is active

CC mode if ILIM < 1.68A; otherwise, Trip mode

Legacy 3 charger emulation profile accepted

CC mode if ILIM < 1.68A; otherwise, Trip mode

Legacy 1, Legacy 2 or Legacy 4 – Legacy 7 charger

emulation profile accepted

Trip mode

Note 1:

In the case of UCS1003-1, under these specific conditions with ILIM < 1.68A, it is the relationship of ILIM

and IBUS_R2MIN that determines the Current-Limiting mode. In these cases, the value of IBUS_R2MIN is

determined by the CS_R2_IMIN<2:0> bits, Custom Current-Limiting Behavior Configuration<4:2>

(Register 10-49).

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