GND

VCC

D-

/OE

SEL

D+

MHL-

USB-

MHL+

USB+

Application

Processor

Charger

IC

VBUS

D-

D+

GND

5 V

Æ 9 V

Potential short

in connector

Phone/Tablet

3.3 V

TS3USB3000

Battery

TS3USB3000

www.ti.com

SCDS337B – DECEMBER 2012 – REVISED DECEMBER 2015

Feature Description (continued)

In Figure 13, the system has an application processor (AP) that cannot survive 9-V on the USB data lines. The

following procedure protects the system and the TS3USB3000. As stated in the Absolute Maximum Ratings

footnotes, the 9-V rating is only applicable while the VCC is powered within the voltage range of the

recommended operating conditions and the OE pin is high.

1. After a charger is connected to the USB port, the AP detects that a DCP is attached.

2. The AP pulls the OE pin high to disable the switches.

3. The AP communicates to the Charger that it can negotiate for a faster charging mode with VBUS at 9-V.

4. The TS3USB3000 is now in a low-power state with the switches disabled and can protect the AP.

Figure 13. Potential VBUS to D- Short Example

Copyright © 2012–2015, Texas Instruments Incorporated

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Product Folder Links: TS3USB3000