UCS1003-2 datasheet(58/138 Pages) MICROCHIP

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UCS1003-1/2/3

DS20005346B-page 58

 2014-2015 Microchip Technology Inc.

9.11.4

LEGACY 5 CHARGER

EMULATION PROFILE

Legacy 5 charger emulation profile does the following:

The UCS1003-1 will apply 900 mV to both the

DPOUT and the DMOUT pins.

VBUS voltage is applied.

If the portable device draws more than IBUS_CHG

current when the tEM_TIMEOUT timer expires, the

UCS1003-1 will accept that the currently applied

profile is the correct charger emulation profile

for the attached portable device; charging

commences. The voltages applied to the DPOUT

and DMOUT pins will remain in place (unless

EM_RESP is set to ‘0b’). The UCS1003-1 will

begin operating in Trip mode or CC mode, as

determined by the IBUS_R2MIN setting (see

Section 10.14

“Current-Limiting

Behavior

Configuration Registers”

If the portable device does not draw more than

IBUS_CHG current when the tEM_TIMEOUT timer

expires, the UCS1003-1 will stop the currently

applied charger emulation profile. This will

cause all voltages put onto the DPOUT and

DMOUT pins to be removed. Emulation Reset

occurs and the UCS1003-1 will initiate the next

charger emulation profile.

9.11.5

LEGACY 7 CHARGER

EMULATION PROFILE

The Legacy 7 charger emulation profile does the

following:

The UCS1003-1 will apply a voltage on the

DPOUT pin using a voltage divider between VBUS

and ground with the center tap on the DPOUT

pin.

VBUS voltage is applied.

If the portable device draws more than IBUS_CHG

current when the tEM_TIMEOUT timer expires, the

UCS1003-1 will accept that Legacy 7 is the

correct charger emulation profile for the

attached

portable

device.

Charging

commences. The voltage applied to the DPOUT

pin will remain in place (unless EM_RESP is set

to 0b). The UCS1003-1 will begin operating in

Trip mode or CC mode, as determined by the

IBUS_R2MIN

setting

(see

Section 10.14

“Current-Limiting

Behavior

Configuration

Registers”

If the portable device does not draw more than

IBUS_CHG current when tEM_TIMEOUT timer

expires, the UCS1003-1 will stop the Legacy 7

charger emulation profile. This will cause the

voltage put onto the DPOUT pin to be removed.

Emulation reset occurs, and the UCS1003-1 will

initiate the next charger emulation profile.

9.12

Preloaded Charger

Emulation Profiles in UCS1003-2

and UCS1003-3

The following charger emulation profiles are resident to

the UCS1003-2/3:

• Legacy 1 Charger Emulation Profile

• Legacy 2, 4, 5 and 7 Charger Emulation Profiles

• Legacy 3 Charger Emulation Profile

• Legacy 6 Charger Emulation Profile

• BC1.2 CDP Charger Emulation Profile

• BC1.2 DCP Charger Emulation Profile

9.12.1

LEGACY 1 CHARGER

EMULATION PROFILE

Legacy 1 charger emulation profile does the following:

The UCS1003-2/3 will apply 900 mV to both the

DPOUT and the DMOUT pins.

VBUS voltage is applied.

If the portable device is charging, the

UCS1003-2/3 will accept that the currently

applied profile is the correct charger emulation

profile for the attached portable device; charging

commences. The voltages applied to the DPOUT

and DMOUT pins will remain in place. The

UCS1003-2/3 will begin operating in Trip mode.

If the portable device is not charging, the

UCS1003-2/3 will stop the currently applied

charger emulation profile. This will cause all volt-

ages put onto the DPOUT and DMOUT pins to be

removed. Emulation Reset occurs and the

UCS1003-2/3 will initiate the next charger

emulation profile.

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