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UCS1003-3 Scheda tecnica(PDF) 59 Page - Microchip Technology

Il numero della parte UCS1003-3
Spiegazioni elettronici  USB Port Power Controller with Charger Emulation
PDF  138 Pages
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Produttore elettronici  MICROCHIP [Microchip Technology]
Homepage  http://www.microchip.com
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UCS1003-3 Scheda tecnica(HTML) 59 Page - Microchip Technology

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 2014-2015 Microchip Technology Inc.
DS20005346B-page 59
UCS1003-1/2/3
9.12.2
LEGACY 2, 4, 5 AND 7 CHARGER
EMULATION PROFILES
Legacy 2, 4, 5 and 7 charger emulation profiles follow
the same pattern of operation, although the voltage that
is applied on the DPOUT and DMOUT pins will vary. They
do the following:
1.
The UCS1003-2/3 will apply a voltage on the
DPOUT pin using either a current-limited voltage
source or a voltage divider between VBUS and
ground, with the center tap on the DPOUT pin.
2.
The UCS1003-2/3 will apply a possibly different
voltage on the DMOUT pin, using either a
current-limited voltage source or a voltage
divider between VBUS and ground. with the
center tap on the DMOUT pin.
3.
VBUS voltage is applied.
4.
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
(see Section 10.14 “Current-Limiting Behavior
Configuration Registers”
).
5.
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.
9.12.3
LEGACY 3 CHARGER
EMULATION PROFILE
The Legacy 3 charger emulation profile does the
following:
1.
The UCS1003-2/3 will connect a resistor
(RDCP_RES) between DPOUT and DMOUT.
2.
VBUS is applied.
3.
If the portable device is charging, the
UCS1003-2/3 will accept that this is the correct
charger emulation profile for the attached
portable device; charging commences. The
resistive short between the DPOUT and DMOUT
pins will be left in place.
4.
If the portable device is not charging, the
UCS1003-2/3 will stop the Legacy 3 charger
emulation. This will cause a resistive short
between the DPOUT and DMOUT pins to be
removed. Emulation Reset occurs and the
UCS1003-2/3 will initiate the next charger
emulation profile.
9.12.4
LEGACY 6 CHARGER
EMULATION PROFILE
The Legacy 6 charger emulation profile does the
following:
1.
The UCS1003-2/3 will apply a voltage on the
DPOUT pin using a voltage divider between VBUS
and ground, with the center tap on the DPOUT
pin.
2.
VBUS voltage is applied.
3.
If the portable device is charging, the
UCS1003-2/3 will accept that Legacy 6 is the
correct charger emulation profile for the
attached portable device; charging commences.
The voltage applied to the DPOUT pin will remain
in place. The UCS1003-2/3 will begin operating
in Trip mode.
4.
If the portable device is not charging, the
UCS1003-2/3 will stop the Legacy 6 charger
emulation profile. This will cause the voltage put
onto the DPOUT pin to be removed. Emulation
Reset occurs and the UCS1003-2/3 will initiate
the next charger emulation profile.
9.13
Custom Charger Emulation Profile
(UCS1003-1 only)
The UCS1003-1 allows the user to create a custom
charger emulation profile to handshake as any type of
charger. This profile can be included in the DCE Cycle.
In addition, it can be placed first or last in the profile
sequence in the DCE Cycle (see Register 10-35).
The custom charger emulation profile uses a number of
registers to define stimuli and behaviors. The custom
charger emulation profile uses three separate
stimulus/response pairs that will be detected and
applied in sequence, allowing flexibility to “build” any of
the preloaded emulation profiles, or tailor the profile to
match a specific charger application.
For details, see Application Note 24.14 – “UCS1002
Fundamentals of Custom Charger Emulation”
.



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