Cell phone fast charging circuits

Hello,

My Motorola phone supports "Turbo" charging, apparently charging my phone at 9-12V after establishing a secret handshake with the charger.

https://www.motorola.com/us/products/turbopower

Is there a chip that performs this authentication?

I'd like to build a car charger for my phone without blowing it up, but I haven't seen any sample schematics.

All I've seen is a reference to a Qualcomm patent:
https://patents.google.com/patent/US9748788

Apparently Turbopower is compatible with the Qualcomm method.

Oh!  I found this too, which mentions details on the secret handshake:
http://www.ti.com/lit/ug/tidu917/tidu917.pdf

but this seems odd to build a boost converter to boost 5V to 12V, especially if vehicle power is available at 12-14V already.

Any suggestions?

Thanks,

Michael

On Wednesday, November 14, 2018 at 1:49:28 PM UTC-8, mrda...@gmail.com wrote:
> Hello,
> 
> My Motorola phone supports "Turbo" charging, apparently charging my phone at 9-12V after establishing a secret handshake with the charger.
> 
> https://www.motorola.com/us/products/turbopower
> 
> Is there a chip that performs this authentication?
> 
> I'd like to build a car charger for my phone without blowing it up, but I haven't seen any sample schematics.
> 
> All I've seen is a reference to a Qualcomm patent:
> https://patents.google.com/patent/US9748788
> 
> Apparently Turbopower is compatible with the Qualcomm method.
> 
> Oh!  I found this too, which mentions details on the secret handshake:
> http://www.ti.com/lit/ug/tidu917/tidu917.pdf
> 
> but this seems odd to build a boost converter to boost 5V to 12V, especially if vehicle power is available at 12-14V already.
> 
> Any suggestions?
> 
> Thanks,
> 
> Michael


I may have answered my own question...
https://www.mouser.com/ProductDetail/Power-Integrations/CHY100D?qs=sGAEpiMZZMsfD%252bbMpEGFJa7H9npwZ8pUPWzL67uItEk%3d

Input voltage specs seem a little low for vehicle use though.  I guess I'll need a Buck after all...

https://www.mouser.com/datasheet/2/328/chiphy_family_datasheet-269468.pdf

Michael

On Wednesday, November 14, 2018 at 1:56:00 PM UTC-8, mrda...@gmail.com wrote:
> On Wednesday, November 14, 2018 at 1:49:28 PM UTC-8, mrda...@gmail.com wrote:
> > Hello,
> > 
> > My Motorola phone supports "Turbo" charging, apparently charging my phone at 9-12V after establishing a secret handshake with the charger.
> > 
> > https://www.motorola.com/us/products/turbopower
> > 
> > Is there a chip that performs this authentication?
> > 
> > I'd like to build a car charger for my phone without blowing it up, but I haven't seen any sample schematics.
> > 
> > All I've seen is a reference to a Qualcomm patent:
> > https://patents.google.com/patent/US9748788
> > 
> > Apparently Turbopower is compatible with the Qualcomm method.
> > 
> > Oh!  I found this too, which mentions details on the secret handshake:
> > http://www.ti.com/lit/ug/tidu917/tidu917.pdf
> > 
> > but this seems odd to build a boost converter to boost 5V to 12V, especially if vehicle power is available at 12-14V already.
> > 
> > Any suggestions?
> > 
> > Thanks,
> > 
> > Michael
> 
> 
> I may have answered my own question...
> https://www.mouser.com/ProductDetail/Power-Integrations/CHY100D?qs=sGAEpiMZZMsfD%252bbMpEGFJa7H9npwZ8pUPWzL67uItEk%3d
> 
> Input voltage specs seem a little low for vehicle use though.  I guess I'll need a Buck after all...
> 
> https://www.mouser.com/datasheet/2/328/chiphy_family_datasheet-269468.pdf
> 
> Michael


And that led me to...
https://www.mouser.com/datasheet/2/631/ACT4526_Datasheet-1291191.pdf

from this list:
https://active-semi.com/products/dcdc-converters/high-power

M

On Wednesday, November 14, 2018 at 5:06:26 PM UTC-5, mrda...@gmail.com wrote:
> On Wednesday, November 14, 2018 at 1:56:00 PM UTC-8, mrda...@gmail.com wrote:
> > On Wednesday, November 14, 2018 at 1:49:28 PM UTC-8, mrda...@gmail.com wrote:
> > > Hello,
> > > 
> > > My Motorola phone supports "Turbo" charging, apparently charging my phone at 9-12V after establishing a secret handshake with the charger.
> > > 
> > > https://www.motorola.com/us/products/turbopower
> > > 
> > > Is there a chip that performs this authentication?
> > > 
> > > I'd like to build a car charger for my phone without blowing it up, but I haven't seen any sample schematics.
> > > 
> > > All I've seen is a reference to a Qualcomm patent:
> > > https://patents.google.com/patent/US9748788
> > > 
> > > Apparently Turbopower is compatible with the Qualcomm method.
> > > 
> > > Oh!  I found this too, which mentions details on the secret handshake:
> > > http://www.ti.com/lit/ug/tidu917/tidu917.pdf
> > > 
> > > but this seems odd to build a boost converter to boost 5V to 12V, especially if vehicle power is available at 12-14V already.
> > > 
> > > Any suggestions?
> > > 
> > > Thanks,
> > > 
> > > Michael
> > 
> > 
> > I may have answered my own question...
> > https://www.mouser.com/ProductDetail/Power-Integrations/CHY100D?qs=sGAEpiMZZMsfD%252bbMpEGFJa7H9npwZ8pUPWzL67uItEk%3d
> > 
> > Input voltage specs seem a little low for vehicle use though.  I guess I'll need a Buck after all...
> > 
> > https://www.mouser.com/datasheet/2/328/chiphy_family_datasheet-269468.pdf
> > 
> > Michael
> 
> 
> And that led me to...
> https://www.mouser.com/datasheet/2/631/ACT4526_Datasheet-1291191.pdf
> 
> from this list:
> https://active-semi.com/products/dcdc-converters/high-power
> 
> M

Well good, I'm glad that's cleared up. 
Always happy to help.  :^) 

George H. 

On Thursday, November 15, 2018 at 12:48:31 PM UTC-8, George Herold wrote:
> On Wednesday, November 14, 2018 at 5:06:26 PM UTC-5, mrda...@gmail.com wrote:
> > On Wednesday, November 14, 2018 at 1:56:00 PM UTC-8, mrda...@gmail.com wrote:
> > > On Wednesday, November 14, 2018 at 1:49:28 PM UTC-8, mrda...@gmail.com wrote:
> > > > Hello,
> > > > 
> > > > My Motorola phone supports "Turbo" charging, apparently charging my phone at 9-12V after establishing a secret handshake with the charger.
> > > > 
> > > > https://www.motorola.com/us/products/turbopower
> > > > 
> > > > Is there a chip that performs this authentication?
> > > > 
> > > > I'd like to build a car charger for my phone without blowing it up, but I haven't seen any sample schematics.
> > > > 
> > > > All I've seen is a reference to a Qualcomm patent:
> > > > https://patents.google.com/patent/US9748788
> > > > 
> > > > Apparently Turbopower is compatible with the Qualcomm method.
> > > > 
> > > > Oh!  I found this too, which mentions details on the secret handshake:
> > > > http://www.ti.com/lit/ug/tidu917/tidu917.pdf
> > > > 
> > > > but this seems odd to build a boost converter to boost 5V to 12V, especially if vehicle power is available at 12-14V already.
> > > > 
> > > > Any suggestions?
> > > > 
> > > > Thanks,
> > > > 
> > > > Michael
> > > 
> > > 
> > > I may have answered my own question...
> > > https://www.mouser.com/ProductDetail/Power-Integrations/CHY100D?qs=sGAEpiMZZMsfD%252bbMpEGFJa7H9npwZ8pUPWzL67uItEk%3d
> > > 
> > > Input voltage specs seem a little low for vehicle use though.  I guess I'll need a Buck after all...
> > > 
> > > https://www.mouser.com/datasheet/2/328/chiphy_family_datasheet-269468.pdf
> > > 
> > > Michael
> > 
> > 
> > And that led me to...
> > https://www.mouser.com/datasheet/2/631/ACT4526_Datasheet-1291191.pdf
> > 
> > from this list:
> > https://active-semi.com/products/dcdc-converters/high-power
> > 
> > M
> 
> Well good, I'm glad that's cleared up. 
> Always happy to help.  :^) 
> 
> George H.


Many thanks :D

Sometimes researching while writing a question clears things up.

Although, I'm surprised I haven't found many amateur circuit builders playing with the ACT4526 or the CHY100D...

Michael D.

On Thursday, November 15, 2018 at 3:58:31 PM UTC-5, mrda...@gmail.com wrote:
> On Thursday, November 15, 2018 at 12:48:31 PM UTC-8, George Herold wrote:
> > On Wednesday, November 14, 2018 at 5:06:26 PM UTC-5, mrda...@gmail.com wrote:
> > > On Wednesday, November 14, 2018 at 1:56:00 PM UTC-8, mrda...@gmail.com wrote:
> > > > On Wednesday, November 14, 2018 at 1:49:28 PM UTC-8, mrda...@gmail.com wrote:
> > > > > Hello,
> > > > > 
> > > > > My Motorola phone supports "Turbo" charging, apparently charging my phone at 9-12V after establishing a secret handshake with the charger.
> > > > > 
> > > > > https://www.motorola.com/us/products/turbopower
> > > > > 
> > > > > Is there a chip that performs this authentication?
> > > > > 
> > > > > I'd like to build a car charger for my phone without blowing it up, but I haven't seen any sample schematics.
> > > > > 
> > > > > All I've seen is a reference to a Qualcomm patent:
> > > > > https://patents.google.com/patent/US9748788
> > > > > 
> > > > > Apparently Turbopower is compatible with the Qualcomm method.
> > > > > 
> > > > > Oh!  I found this too, which mentions details on the secret handshake:
> > > > > http://www.ti.com/lit/ug/tidu917/tidu917.pdf
> > > > > 
> > > > > but this seems odd to build a boost converter to boost 5V to 12V, especially if vehicle power is available at 12-14V already.
> > > > > 
> > > > > Any suggestions?
> > > > > 
> > > > > Thanks,
> > > > > 
> > > > > Michael
> > > > 
> > > > 
> > > > I may have answered my own question...
> > > > https://www.mouser.com/ProductDetail/Power-Integrations/CHY100D?qs=sGAEpiMZZMsfD%252bbMpEGFJa7H9npwZ8pUPWzL67uItEk%3d
> > > > 
> > > > Input voltage specs seem a little low for vehicle use though.  I guess I'll need a Buck after all...
> > > > 
> > > > https://www.mouser.com/datasheet/2/328/chiphy_family_datasheet-269468.pdf
> > > > 
> > > > Michael
> > > 
> > > 
> > > And that led me to...
> > > https://www.mouser.com/datasheet/2/631/ACT4526_Datasheet-1291191.pdf
> > > 
> > > from this list:
> > > https://active-semi.com/products/dcdc-converters/high-power
> > > 
> > > M
> > 
> > Well good, I'm glad that's cleared up. 
> > Always happy to help.  :^) 
> > 
> > George H.
> 
> 
> Many thanks :D
> 
> Sometimes researching while writing a question clears things up.
Sure I find the same thing... I start writing a question to SED and 
half way through my brain comes up with what might be the answer.  

George H. 
> 
> Although, I'm surprised I haven't found many amateur circuit builders playing with the ACT4526 or the CHY100D...
> 
> Michael D.

On Friday, November 16, 2018 at 6:50:33 AM UTC-8, George Herold wrote:
> On Thursday, November 15, 2018 at 3:58:31 PM UTC-5, mrda...@gmail.com wrote:
> > On Thursday, November 15, 2018 at 12:48:31 PM UTC-8, George Herold wrote:
> > > On Wednesday, November 14, 2018 at 5:06:26 PM UTC-5, mrda...@gmail.com wrote:
> > > > On Wednesday, November 14, 2018 at 1:56:00 PM UTC-8, mrda...@gmail.com wrote:
> > > > > On Wednesday, November 14, 2018 at 1:49:28 PM UTC-8, mrda...@gmail.com wrote:
> > > > > > Hello,
> > > > > > 
> > > > > > My Motorola phone supports "Turbo" charging, apparently charging my phone at 9-12V after establishing a secret handshake with the charger.
> > > > > > 
> > > > > > https://www.motorola.com/us/products/turbopower
> > > > > > 
> > > > > > Is there a chip that performs this authentication?
> > > > > > 
> > > > > > I'd like to build a car charger for my phone without blowing it up, but I haven't seen any sample schematics.
> > > > > > 
> > > > > > All I've seen is a reference to a Qualcomm patent:
> > > > > > https://patents.google.com/patent/US9748788
> > > > > > 
> > > > > > Apparently Turbopower is compatible with the Qualcomm method.
> > > > > > 
> > > > > > Oh!  I found this too, which mentions details on the secret handshake:
> > > > > > http://www.ti.com/lit/ug/tidu917/tidu917.pdf
> > > > > > 
> > > > > > but this seems odd to build a boost converter to boost 5V to 12V, especially if vehicle power is available at 12-14V already.
> > > > > > 
> > > > > > Any suggestions?
> > > > > > 
> > > > > > Thanks,
> > > > > > 
> > > > > > Michael
> > > > > 
> > > > > 
> > > > > I may have answered my own question...
> > > > > https://www.mouser.com/ProductDetail/Power-Integrations/CHY100D?qs=sGAEpiMZZMsfD%252bbMpEGFJa7H9npwZ8pUPWzL67uItEk%3d
> > > > > 
> > > > > Input voltage specs seem a little low for vehicle use though.  I guess I'll need a Buck after all...
> > > > > 
> > > > > https://www.mouser.com/datasheet/2/328/chiphy_family_datasheet-269468.pdf
> > > > > 
> > > > > Michael
> > > > 
> > > > 
> > > > And that led me to...
> > > > https://www.mouser.com/datasheet/2/631/ACT4526_Datasheet-1291191.pdf
> > > > 
> > > > from this list:
> > > > https://active-semi.com/products/dcdc-converters/high-power
> > > > 
> > > > M
> > > 
> > > Well good, I'm glad that's cleared up. 
> > > Always happy to help.  :^) 
> > > 
> > > George H.
> > 
> > 
> > Many thanks :D
> > 
> > Sometimes researching while writing a question clears things up.
> Sure I find the same thing... I start writing a question to SED and 
> half way through my brain comes up with what might be the answer.  
> 
> George H. 
> > 
> > Although, I'm surprised I haven't found many amateur circuit builders playing with the ACT4526 or the CHY100D...
> > 
> > Michael D.


On that note, I did some tests to see if the TurboCharging is worth it or if it's all in my head.  

The 2.1A charger gave me a linear charge rate charging my phone from 55% battery to 81%, and charged at a rate of 0.68% per minute. 

My Motorola Turbo Charger gave me a linear charge rate from 53% to 77% and charged at a rate of 1.4% per minute, then slowed down after 77%.  This is more than twice as fast as the 2.1A charger.

Michael