TPS2513A Apple Charge Modes

From the datasheets, it looks like the TPS2513 supports Apple 5W (D+ = 2 V, D- = 2.7 V) and Apple 10W (D+ = 2.7 V , D- = 2 V), but the chip must be hardwired into one of the 2 configurations.  Is it correct that the TPS2513 can only be set up as either a fixed 5W or 10W charger, but cannot be set up to autodetect and choose between the two? Yes, this is correct. TPS2513 can auto detect between divider 2 (default), 1.2V, and shorted mode OR by reversing DP/DM auto detect between divider 1, 1.2V, and shorted mode.

It is stated that the TPS2513A supports the Apple 12W standard (D+ = 2.7 V, D- = 2.7 V).  Is this in addition to the simultaneously supporting the 5W and 10W standards? No, TPS2513A only supports divider 3 mode (12W) or 2.7V on DP and DM but can auto-detect between divider 3, 1.2V, and shorted modes.

On the TPS2513 datasheet, figures 9-11 indicate that the charger switch can automatically set the proper voltages for any of the 3 apple modes.  This is consistent with the 'USB Charging Port Controllers (USB-CPC)' table in the 'USB Power Switch and Charging Port Controller Selector Guide' which states that the TPS2513A supports all 3 apple modes.  However, figures 14 & 15 in the TPS2513 datasheet show that the selection between 5W and 10W is permanently set by the D+ and D- connections between the TPS2513 and the USB port.

Does the TPS2513A support and autodetect all 3 Apple divider modes? Only divider 3.  Or does it only support divider 3 [12W] and (divider 1 [5W] or divider 2 [10W])?

Is there a set date for when the TPS2513A will go from preview to active? In roughly 2 weeks or less.

BTW, here is an informative discussion about chargers.

https://discussions.apple.com/thread/2452254

Thanks for the information.  Glad to here that the TPS2513A will be out so soon.

I think I understand the how the TI parts operate, but still am a bit confused on how the Apple devices react to chargers.  Say I have a TPS2513 that is setup to be an Apple 10W charger, divider 2 mode (D+ = 2.7V, D- = 2V).  I then connect a 5W Apple peripheral to it.  Will the 5W peripheral charge at 5W, or will it default to a lower charge rate due to the charge being fixed in the 10W configuration.  I have the related question about connecting a 5W or 10W Apple device connected to a 12W charger (D+ = 2.7V, D- = 2.7V).

The Apple discussion thread you linked to seems to imply that a 5W device will be compatible with a 10W charger, but I don't know if the Apple 10W charger cycles through both divider 1 and divider 2 modes, or if it is fixed at divider 2 like the TPS2513 would be.

Scott,

Apple devices are smart enough to detect the charger and decide charging current accordingly.

E.g. iPhone plug in 5W charger, 1A charging, plug in 10.5W or 12W charger, still 1A charging.

iPad3/4 plug in 5W charger, 1A charging, won't go any higher. Plug in 10.5W charger, 2A charging. Plug in 12W charger, 2.3A charging.

When you use TPS2513 5W mode, Apple device max charging current is 1A, no matter it's iPhone or iPad. It's the same use iPhone charger to charge iPad, iPad will only charge 1A.

Hope it can help you.

Hello Vincent,

You've provided very helpful information.  I understand what you have explained in your previous response.

Yet, my question to you is, if I were to use the TPS2513A (which only supports Divider 3 mode) are there any devices that will have "problems" during charging?  What I'm trying to say is that you have provided examples of how connecting lower current drawing Apple devices such as iPod, iPhone, etc.  will still be able to function when connected to the TPS2513A, yet they will only draw their maximum intake of 1A.

But are there any devices that you might be aware of that will not charge at their maximum current?

Or, are there any devices that won't charge at all when connected to TPS2513A (Divider 3)?

What potential drawbacks are there for using an "A" suffix version of the part (Divider 3 only) versus the regular part (non-"A") that do not have Divider 3 mode?

Thanks in advance.

Hrag,

So far, from compatibility side, we don't see clear draw back of divider3, some old iPods earlier than 2009 may have issue with Divider3, but they are also not compatible with divider2 2.1A charger, so still no much difference. 

OK, compare divider2 and divider3, why A version instead of non-A version:

Begin from iPad3, 42Whr battery is used, long charging time starts to become an issue. Compare charging time, from battery 0% to 100%, 2.1A charger takes 6hrs, 2.4A charger takes 5hr40mins. So 20mins quicker, but not much. 

We believe the key reason Apple release 2.4A charger is for better user experience when charging and playing at same time. When play high quality video games, like Infinity II and charging at same time, my iPad3's battery percentage increase is very very slow, e.g, 30mins later, only increase 2percent which drive me crazy. 

While using 2.4A charger, the battery status increase faster, at least I feel normal, ok with it. 

Hope these informations are helpful, thanks! 

Hello Vincent,

Thanks for the quick response.  What about non-Apple devices (devices from other manufacturers)?  Will using the TPS2513A (Divider 3 only) have any drawbacks, i.e. device does NOT charge, etc.?

Thanks.

Hrag,

Tps2513A supports BC1.2 shorted and Galaxy Tab 1.2/1.2V mode, so for non-Apple devices, there's no difference with non-Apple version. 

Dears,

According to the discussion above, what I can say is, if customer needs apple 2.4A charging mode, they must use solution that support divider 3 mode, right? 

Hi Vincent,

I have a question about TPS2513 (Dual-USB port, supports divider 1 and divider 2). 

Our regulator circuitry could provide 15W output typically and over-current protect (OCP) at 3.4A, and has TWO physical USB ports (calls port A and port B) in it.

We want to use a single piece TPS2513 and to avoid OCP latch-up. Should we connect divider 1 and divider 2 to our regulator Port A and Port B vice versa? 

S.C.

Steven,

You can use TPS2513 one channel with 10W configuration, another channel 5W configuration (swap D+/D-).

10W mode, it can support 2.1A charging to iPad and also supporting BC1.2 shorted and 1.2V/1.2V Galaxy Tab divider.

5W mode, it's 1A for Apple device while still supporting BC1.2 shorted and 1.2V/1.2V Galaxy Tab divider.

Vincent, 

Thank you. Charging to Apple devices are solved. 

We saw that some Samsung's tablet chargers capable to provide 1.8A. So if we applied the mentioned configuration：

"use TPS2513 one channel with 10W configuration, another channel 5W configuration (swap D+/D-)."

1) Then will some Galaxy Tab draw more than 1A from either ports? 

2) Either ports supports Blackberry's and Amazon's devices? 

We are very difficult to get such devices in the markets here for our testing.

Thanks

S.C.

Steven,

Understand your concern, some Samsung devices, especially new ones or BC1.2 tablets, they may draw more than 1.5A. If first 10W port is plugged in an iPad, totaol together, it might together higher than 3.4A.

While, I need to point out, for high charging current tablets, usually the DC voltage of the OEM charger is not 5V, instead ~5.15V. If you use 5V for power stage output, these tablets usually won't pull too high current.

E.g. 5V DC charging to iPad3 or iPad4, you can get ~1.8A, not 2.1A. Similar behavior in BC1.2 or Galaxy products.

So I would sugguest you use 5V DC output voltage, not to use 5.15V, it may let 10W port charging current a little bit lower than OEM charger, but I don't think it will impact the user experience to much and it can control the total power budget.

Another sugguestion is to use a super low Rdson, adj high accuracy power switch to protect the system.

Use one piece of TPS2559 to set current limit 3.4A, it has very low Rdson 14mohm and high accuracy. Or you can use two pieces of TPS2557 (22mohm), one set 2.1A current limit, one set 1.3A current limit.  

Hi Vincent, 

Got it. Much current would be drawn if voltage get higher.

And TPS2513 supports devices from Amazon or Blackberry? 

S.C.

Steven,

Yes, TPS2513 supports devices from Amazon and Blackberry, the following devices are verified to be work propoerly with TPS2513:

Kindle Fire, Kindle Fire HD.

Blackberry: