UCC28782: 10 Watt USB-Charger 5V-Output

Emanuel Lemnitz1

Part Number: UCC28782
Other Parts Discussed in Thread: UCC28742, UCC28704, UCC28740

Hello TI-Team,

i`m working on my Master-Thesis at university of applied sience Fulda. My goal is to develop a 10 Watt USB-Charger with printed electronic like the transformer, capacitors and resistors. To keep losses and the inductanz of the transformer as low as possible I need to use high frequenzys (1-1.5 MHz). I was working with your Design tools (Excle) & simulation (Simplis) but I couldnt get the appication running like I wanted.

Here are my conditions:

Vout= 5V, Iout=2A, f=1-1.5MHz

case: CS0302767

Could you help me setting the right parameters?

Kind regards

Emanuel Lemnitz

over 4 years ago

0 Emanuel Lemnitz1 over 4 years ago

Prodigy 140 points

UCC28782 Excel Design Calculator RevA.xlsx

0 Mike O' over 4 years ago in reply to Emanuel Lemnitz1

TI__Guru* 86266 points

Hello Emanuel,

I am forwarding this request to the appropriate applications engineer so they can help answer your questions.

Regards,

0 Jaden Ning over 4 years ago in reply to Mike O'

TI__Expert 7080 points

Hello Emanuel,

Thanks for your interesting in TI's part.

I don't think UCC28782 is a good candidate for a 10W output USB charger . Since it's a high cost solution, target for >30W design. In theory , this controller can support up to 1.2MHz switching frequency , but in practice , Nobody will running this controller at such frequency . since very higher loss on switches and transformer .That is will lead to low efficiency , and even you can't find a such high frequency SR controller in the market now.

I recommend you chose UCC28704 or UCC28742 to instead of UCC28782 for this 10W charge design.

Thanks.

0 Emanuel Lemnitz1 over 4 years ago in reply to Jaden Ning

Prodigy 140 points

Hello Jaden,

would those controllers support GaN MOSFETs?

Kind Retards

Emanuel Lemnitz

0 Jaden Ning over 4 years ago in reply to Emanuel Lemnitz1

TI__Expert 7080 points

Hello , Emanuel,

What kind of GaN FET do you want to use in your design? there are many types of GaN FET in the market now , Such as GaN FET which integrated with driver , if the PWM IN pin can support ~15V voltage. this part can be driven by UCC28704 and UCC28740. Another GaN FET called gate injection transistor also can be driven by those parts.

Thanks.

0 Jaden Ning over 4 years ago in reply to Jaden Ning

TI__Expert 7080 points

Hello, Emanuel,

Since not get response from you for a long time , I believe you have solved this problem. if you have other questions , please create a new post.

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UCC28782: 10 Watt USB-Charger 5V-Output