STCC5021 datasheet(12/37 Pages) STMICROELECTRONICS

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Application information

STCC5011, STCC5021

12/37

DocID024660 Rev 6

Application information

The STCC5011 and STCC5021 devices are designed to be implemented into the PC on

a USB port in order to emulate the wall charger adapter when the PC is in standby mode or

OFF, and to allow higher charge current when the USB interface is used for data

communication. In order to handle these functionalities, the STCC5011/STCC5021 devices

rely on USB BC1.2 specifications, Chinese telecommunications industry standard YD/T

1591-2009 and proprietary implementations

•

BC1.2 charging profiles are:

–

CDP: charging downstream port providing data communication plus charging

(active USB data communications with 1.5 A support)

–

SDP: standard downstream port providing data communication with no charging

(active USB 3.0 data communications with 900 mA support or USB 2.0 data

communications with 500 mA support)

–

DCP: dedicated charging port (wall charger emulation with no data communication

and 500 mA to 1.5 A support)

•

Chinese telecommunications standard

–

D+ and D- shorted to allow charging

•

Apple divider mode comes in 2 profiles

–

1 A max. current drawn by Apple iPod, iPhone (STCC5011)

–

2 A max. current drawn by Apple iPad, supporting also Apple iPod and iPhone

(STCC5021)

•

BlackBerry emulator mode

•

Legacy mode (allowing 500 mA charging current)

•

Korean tablet charging mode (D+ and D- shorted and pulled up to a certain voltage)

Figure 4. Typical application diagram

1. CVBUS required by the USB specification.

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