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Power Interface Forum
Hi, I am trying to configure the TPS2540EVM to work as universal output that able to work with Apple products, Samsung GALAXY Tab, Kindle and other USB charger . Can you assist me what R value should I change and where S1 position. Thank you for the info
The TPS2543 (and EVM) will allow more devices to be charged than TPS2540. For TPS2540EVM, set S1 to the DIS/SDP/DCP positon and install JP5 and JP7. For TPS2543EVM choose one of the auto mode settings (see the EVM user guide).
Great support, Yes that is true, this configure can only pulled 1.3..Amp. Is there away to get 2.5Amp and does it charge Samsung GALAXY Tab? Thanks again
JP7 on the TPS2540EVM can choose between 2.4A (install shunt on JP7) or 1.2A (remove shunt on JP7) but it is possible to get different current limits by changing R2 or R3. For example, to guarantee greater than 2.55A current limit (2.84A nominal) when JP7 shunt is removed change R3 value to 16.9kohms.
But, it is up to the portable device (PD) to consume the higher current once it is assured that the power source can deliver it (through the standard data line request schemes). If the PD uses some request scheme (sometimes proprietary to the PD manufacturer) that TPS2540 doesn't understand (like the PD in question), then TPS2540 will not respond appropriately and the PD won't charge at the higher current. There is a new device releasing in a few months that will allow more of these unique PD's to charge at higher currents. Please contact your local TI sales office for more detail.
See also this thread: http://e2e.ti.com/support/power_management/power_interface/f/204/p/180904/668237.aspx#668237
Continue with the question, can you let me know which TI chip would better for universal USB that able to switch and charging all available USB devices and you recommandation
Is the application power switch only or power switch + USB 2.0 data line switch?
I am looking for power switch +USB 2.0 data line switching, so that able to charge Apple devices, Kindle, Samsung products include Samsung Tab. Thank you for your idea.
TPS2543 supports data pass through and charging of most standard PD's.
Would you recommend a different chip if only DCP_auto mode was needed and data pass through is not required?
If only DCP_auto mode was needed, TPS2511 would be a good part. it can support different charging specification.
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