Battery Charging Specification, Revision 1.2 December 7, 2010
Revision History
Major updates to all sections. Added Data Contact
Detect protocol, and Accessory Charger Adapter.
Adam Burns
Following items indicate changes from BC1.1 to
BC1.2. References below to Section, Figures and
Tables refer to BC1.2, unless BC1.1 is specifically
indicated.
1. Allow DCPs to output more than 1.5A. Allows
Portable Devices (PDs) with switch mode chargers to
draw more power. Section
4.4.1.
2. Increase minimum CDP current to 1.5A. Without
change, PDs had to draw less than 500mA, to avoid
CDP shutdown.
Table 5-2.
3. Indicate that
ICDP max and IDCP max limits of 5A
come from USB 2.0, and are safety limits.
Table 5-2
note 1.
4. Allow PDs to draw up to 1.5A during HS chirp and
traffic. Remove previous limits of 560mA and 900mA
which was based on HS common mode ranges.
Section
3.5.
5. Require CDPs to support 1.5A during HS chirp and
traffic. Affects CDP common mode range.
Section
3.5.
6. Reduce maximum PD current from 1.8A to 1.5A, to
avoid shutdown when attached to CDP.
Table 5-2.
7. Rename Docking Station to ACA-Dock, to avoid
confusion with other types of Docking Stations.
8. Require ACA-Dock to differentiate itself from an
ACA, by enabling
VDM_SRC during no activity.
Section
3.2.4.4.
9. Allow CDP to leave
VDM_SRC enabled while
peripheral not connected. Section
3.2.4.2.
10. Remove I
CHG_SHTDWN. This was a recommended
max output current for Charging Ports with VBUS
grounded. BC1.1 Section 4.1.
11. Require
VDP_SRC to not pull D+ below 2.2V when
D+ is being pulled to
VDP_UP through RDP_UP.
Require
VDM_SRC to not pull D- below 2.2V when D- is
being pulled high. Required for ACA-Dock support.
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