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TPS2540: Support for Dual Role (OTG) devices

Part Number: TPS2540
Other Parts Discussed in Thread: TPS2549


I'm working on a project which needs to supply > 500 mA to a USB device, but also function as a dual-role OTG device.  The TPS2450 works fine for host mode, but there's no way to disable the power output (5V) to USB for a proper device mode.

After a bit of research, I discovered the TPS2549 which supports "Client Mode" in which USB D+ and D- lines remain connected, but the power switch is disconnected.  This device also support CDP and SDP emulation, which is perfect for my project.

I just wanted to post this here in case anyone else was interested in creating a OTG device which can supply more than 500mA in host mode.