TPS2514: 5V/1A, 5V/2A charging solutions

Hi Emma,

Here is one question want to confirm with you, in the datasheet 8.4 section, it says the "TPS2514 can automatically monitor the voltage of the USB data lines, and provide the correct electronic signatures on the data lines to charge compliant devices",

How to understand the process? For example, one smartphone is connected to the port, what the process is to determine if it is 5W or 10W charging?

Besides, in the datasheet 9.2, for the 5W and 10W application, the connection is different, my customer need support 5W and 10W with the same connection, could you please help check if TPS2546 is the right part to promote?

My customer need USBA to Lighting/Micro USB line and support 5W and 10W charging, can TPS2546 be used?

If yes, how to control the TPS2546 in such application?

Thanks.

Hello John,

The TPS2514 uses enumeration on the DP and DM lines to determine what type of mode the device can charge in, CDP, SDP, or DCP. The device DCP controllers have the auto-detect feature that monitors the D+ and D– line voltages of the USB connector, providing the correct electrical signatures on the DP and DM pins for the correct detections of compliant portable devices to fast charge. The 5 W and 10 W  connections do require different wiring of the DP/DM lines, so even though you do not need the power switch in the TPS2546, that is the recommended part for this application, as it can do Divider 1 or Divider 2 using the same connections. The TPS2546 uses the CTL pins to determine what mode to charge in. 

The TPS2514 devices are for a USB dedicated charging port. The device only provides the correct electrical signatures on the data lines of USB charger port and do not provide any power for the VBUS.

The TPS2546 does provide power to VBUS. The TPS2546 is a USB charging port controller and power switch with an integrated USB 2.0 high-speed data line (D+/D–) switch. 

Thanks,

Emma

Hi Emma,

In this case, no data communication is required, you mentioned need use CTL pins to determine the mode, in real application, which mode should be used if customer want to support 1A and 2A charging?

Thanks.

Hello John,

If you only want charging, using the TPS2546 you can use the DCP_auto mode. The following pin inputs will use DCP_auto mode:

If you want the to use the STATUS pin functionality, you will need to ensure that the STATUS OUTPUT column does not say OFF. 

Thanks,

Emma

Hi  Emma,

Thanks for your confirmation.

From the table, CTL1,CTL2,CTL3 ILIM_SEL is 0010 and 0110 has the same function, am I right?

Thanks.

Hello John,

You are correct,  0010 and 0110 are the same.

Thanks,

Emma

Hi Emma,

Sorry for the questions again, customer change the design requirement, and need support charging and USB2.0 data communication simultaneously.

Attached please find the requirement, the device is as power provide, but as data device, it charge the data host. can this function be implemented by TPS2546?

In my previous application, it is the data host side provide the power to device, but in this case, it is the data device side to provide the power to data host.

Thanks.TPS2546 quesitons.docx

Hi John,

The TPS2546 can act as a power switch and can only provide power to a connected portable device. A device cannot provide power to the host through the TPS2546.

CDP mode can charge a connected device and establish a data connection between the device and host. 

The TPS2546 does not act as a DRP, and is a DFP only. 

Thanks,

Emma