Charging Mobile Devices From Shutdown PCs Becomes Reality With Unique USB Chips From STMicroelectronics

Charging Mobile Devices From Shutdown PCs Becomes Reality With Unique USB Chips 
From STMicroelectronics 
USB Charger Emulators Featuring Patented Attach Detection and Unique
Charge-Termination Capability Make Mobile Charging Friendlier for the
Environment and Users Alike 
GENEVA -- (Marketwired) -- 07/25/13 --   STMicroelectronics (NYSE:
STM), a global semiconductor leader serving customers across the
spectrum of electronics applications, has perfected advanced features
in its latest PC USB chips that significantly reduce the
environmental impact of charging mobile devices. 
As smartphones and media players typically connect to a PC for data
exchange, users are tending also to charge their devices from PC USB
ports. Indeed, the International Electrotechnical Commission's (IEC)
universal phone-charger standard[1] promotes USB charging by making
use of the USB interface specification. The IEC says[2] the standard
could help reduce the 51,000 tons of redundant chargers produced each
year and cut the mobile industry's annual greenhouse gas emissions by
13.6 million tons. 
ST's new STCC5011 and STCC5021 go a step further in saving energy and
reducing CO2 emissions by allowing users to charge mobile devices
from a USB port even when the computer is in software-controlled
shutdown mode. Using a unique attach-detection feature, which is
patented by ST and operates when the PC is shut down, the chips
(called charger emulators) can detect when a mobile device has been
connected. This enables the PC's power supply to be activated for
charging. The chips also monitor current to turn the power supply off
when charging is complete and thereby maximize the energy savings.
Other charger emulators require the PC to be in working or sleep mode
to charge the device, which consumes more power than when the PC is
in shutdown mode. 
Charging in PC shutdown mode with the STCC5011 or STCC5021 improves
the energy efficiency of USB charging and makes it more convenient
for end users. Moreover, when the USB port is active and waiting for
a device to be connected for charging, ST's chips consume only 1/16
of the power of other charger emulators. This allows PCs to offer
convenient USB charging with minimal impact on power consumption or
PC battery life during normal use. Both chips have
 circuitry to avoid
discharging the PC's battery, which allows even the most mobile of
users to charge devices safely while using the PC on battery power
The STCC5011 has a 1A charge-current limit suitable for Apple iPod(R)
and iPhone(R). The STCC5021 has a limit of 2A for charging iPad(R) as
well as iPod and iPhone. Both chips are compatible with the USB
battery charging standard BC1.2, USB2.0, USB3.0, and Chinese
telecommunications standard YD/T 1591-2009, which mandates use of USB
charging to reduce electronic waste and protect the environment. They
also support proprietary chargers such as BlackBerry(R) charging
mode, as well as Apple(R) divider mode (for 1A and 2A charging, as
described above). 
Major features of STCC5011/5021: 

--  Pin-selectable charger-emulation profiles
--  USB2.0-compliant USB data switch with 1000MHz bandwidth
--  Low-resistance (60 milli-ohm) integrated power switch
--  Built-in safety protection
--  Charging-indication output in DCP (Dedicated Charging Port) and CDP
    (Charging Downstream Port) modes

Operation in PC Advanced Configuration & Power Interface (ACPI) modes: 

--  Support for remote wakeup in ACPI S3 mode (PC sleep mode)
--  Device attachment detection in ACPI G2 mode (shutdown/soft-off, or S5)

The STCC5011 and STCC5021 are in production now, available in the
VFQFPN 16-pin 3 x 3 x 0.8mm package, priced from $0.75 for orders
over 1,000 pieces. 
For further information on ST's USB charger emulators please go to 
About STMicroelectronics
 ST is a global leader in the semiconductor
market serving customers across the spectrum of sense and power and
automotive products and embedded processing solutions. From energy
management and savings to trust and data security, from healthcare
and wellness to smart consumer devices, in the home, car and office,
at work and at play, ST is found everywhere microelectronics make a
positive and innovative contribution to people's life. By getting
more from technology to get more from life, ST stands for
In 2012, the company's net revenues were $8.49 billion. Further
information on ST can be found at 
[1] IEC 62684
USB Chargers from STMicroelectronics
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For Press Information Contact:
Michael Markowitz
Director Technical Media Relations
+1 781 591 0354 
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