General Description

The EC49021A are USB dedicated charging port (DCP) controllers.
An auto-detect feature monitors USB data line voltage, and automatically provides the correct electrical signatures on the data lines to charge compliant devices among the following dedicated charging schemes:
■ Divider 1 DCP, required to apply 2 V and 2.7 V on the D+ and D– Lines respectively.
■ Divider 2 DCP, required to apply 2.7 V and 2 V on the D+ and D– Lines respectively.
■ BC1.2 DCP, required to short the D+ Line to the D– Line
■ Chinese Telecom Standard YD/T 1591-2009 Shorted Mode, required to short the D+ Line to the D– Line.
■ 1.2 V on both D+ and D– Lines.

FEATURE

■ Supports USB DCP Shorting D+ Line to D- Line per USB Battery Charging Specification, Revision 1.2(BC1.2).
■ Supports Shorted Mode (Shorting D+ Line to D- Line) per Chinese Telecommunication Industry Standard YD/T
1591-2009.
■ Supports USB DCP Applying 2.7 V on D+ Line and 2 V on D- line (or USB DCP Applying 2 V on D+ Line and 2.7
V on D– Line).
■ Supports USB DCP Applying 1.2 V on D+ and D– Lines.
■ Automatically Switch D+ and D- Lines Connections for an Attached Device.
■ Dual USB Port Controller, EC49021AD.
Single USB Port Controller, EC49021AS.
■ Operating Range: 4.5 V to 5.5 V.
■ Available in SOT23-6 Package.

APPLICATION

■ Vehicle USB Power Charger
■ AC-DC Adapter with USB Port
■ Other USB charger