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  Microchip Technology Semiconductor Electronic Components Datasheet  

UCS81002 Datasheet

Automotive USB Port Power Controller

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UCS8100X
Automotive USB Port Power Controller
with Charger Emulation
PRODUCT FEATURES
General Description
The UCS81001 and UCS81002 (referred to as the
UCS8100X in this document) provide a USB port power
switch for precise control of up to 2.5 amperes continuous
current with over-current limit (OCL), dynamic thermal
management, latch or auto-recovery (low test current) fault
handling, selectable active low or high enable, under- and
over-voltage lockout, back-drive protection, and back-
voltage protection.
Split supply support for VS and VDD is an option for low
power in system standby states. This gives battery
operated applications, like onboard computers, the ability to
detect attachments from a sleep or off state. After the
Attach Detection is flagged, the system can decide to wake
up and/or provide charging.
In addition to power switching and current limiting modes,
the UCS8100X will automatically charge a wide variety of
portable devices, including USB-IF BC1.2, YD/T-1591
(2009), most Apple® and RIM®, and many others. Nine
preloaded charger emulation profiles maximize
compatibility coverage of peripheral devices. As well, a
customizable charger emulation profile is available to
accommodate unique existing and future portable device
handshaking / signature requirements.
The UCS8100X also provides current monitoring to allow
intelligent management of system power and charge
rationing for controlled delivery of current regardless of the
host power state. This is especially important for battery
operated applications that want to provide power and do
not want to drain the battery excessively.
The UCS8100X is available in a 28-pin QFN 5 mm x 5 mm
package.
Applications
DC power socket replacement
Consumer USB port protection
Consumer device charging port
Auxiliary box charging feature
Rear seat entertainment consumer access point
Datasheet
Features
Port power switch with two current limit behaviors
— 2.9 V to 5.5 V source voltage range
— Up to 2.5 A current with 55 mΩ On Resistance
— Over-current trip or constant current limiting
— Soft turn-on circuitry
— Programmable current limit
— Dynamic thermal management
— Under- and over-voltage lockout
— Back-drive, back-voltage protection
— Latch or auto-recovery (low test current) fault handling
— Selectable active high or low power switch enable
— BC1.2 VBUS discharge port renegotiation function
Selectable / automatic cycling of USB data line charger
emulation profiles
— Employs unique method and system for sampling
multiple profiles1
— USB-IF BC1.2 charging downstream port (CDP) &
dedicated charging port (DCP) modes, YD/T-1591, and
most Apple and RIM protocols standard; others as
defined via the SMBus 2.0 / I2C® protocol
— USB 2.0 compliant high-speed data switch (in Data
Pass-through, SDP, and CDP modes)
— Nine preloaded charger emulation profiles for maximum
compatibility coverage of peripheral devices
— One custom programmable charger emulation profile
for portable device support for fully host controlled
charger emulation
Self-contained current monitoring and rationing for
power allocation applications
Low power Attach Detection and open-drain A_DET# pin
Ultra low power Sleep state
Optional split supply support for VBUS and VDD for low
power in system standby states
Wake on Attach USB
Alert on reset (UCS81002 only)
SMBus 2.0 / I2C communications
— Supports Block Write and Read
— Multiple SMBus addresses
Wide operating temperature range: -40 °C to +85 °C
1.Unique technology covered under the following US patents pending: 13/109,446; 13/149,529; 13/173,287; 13/233,949;
13/157,282; 12/978,371; 13/232,965.
2013 Microchip Technology Inc.
MICROCHIP DATASHEET
DS-60001237A


  Microchip Technology Semiconductor Electronic Components Datasheet  

UCS81002 Datasheet

Automotive USB Port Power Controller

No Preview Available !

Automotive USB Port Power Controller with Charger Emulation
Datasheet
Block Diagram
DPIN
DMIN
VDD
VDD Attach Detector
USB 2.0 HS Data Switch
& Charger Emulator
VS
GND
UVLO,
OVLO
Power
Switch
Charger Control,
Measurement,
OCL
Temp
VDD
Interface,
Logic
DPOUT
DMOUT
VBUS
COMM_SEL / ILIM
ALERT#
A_DET#
PWR_EN
SEL
EM_EN
M1
M2
SMCLK / S0
SMDATA / LATCH
DS-60001237A
2
MICROCHIP DATASHEET
2013 Microchip Technology Inc.


Part Number UCS81002
Description Automotive USB Port Power Controller
Maker Microchip
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UCS81002 Datasheet PDF






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