UCC2897A: Solar micro-inverter

Ziad Yacoub

Prodigy 120 points

Part Number: UCC2897A
Other Parts Discussed in Thread: UCC28220, LM5034

Do you recommend using the UCC2897A to control the flyback stage of a solar micro-inveter?

over 6 years ago

0 Peter Meaney over 6 years ago

TI__Mastermind 31580 points

Hi Ziad,

The UCC2897a is an active clamp forward controller and may be used in a flyback design but we do not have many examples in the flyback circuit.

Can you tell the specifications of the power supply you need to design and I can suggest a reference design for you?

Thanks

Peter

0 John Griffin1 over 6 years ago

TI__Mastermind 34465 points

Hello Ziad,

The UCC2897A is almost always used as a forward converter in thee power range of about 100W to 200W in medim voltage DCDC converters

You should consider using some other pwm controller based on your design requirements of input voltage and output power.

Regards

John

0 Ziad Yacoub over 6 years ago in reply to Peter Meaney

Prodigy 120 points

Hi Peter,

The DC input range is 16-60 V and the flyback output is around 200 V DC.

Regards,

Ziad

0 Ziad Yacoub over 6 years ago in reply to John Griffin1

Prodigy 120 points

Hi John,

The DC input is 16-60 V and the output DC is around 200 V with target output power of 250 Watt.

Regards,

Ziad

0 Peter Meaney over 6 years ago in reply to Ziad Yacoub

TI__Mastermind 31580 points

Hi Ziad,

At 250W a flyback is not an option, the rms currents in a flyback toplogy limit its usefulness to below 150W, if you go to the UCC2897a webpage you will find a variety of the UCC2897a designs which may be a useful starting point for your design.

www.ti.com/.../toolssoftware

Regards

Peter

0 Ziad Yacoub over 6 years ago in reply to Peter Meaney

Prodigy 120 points

Hi Peter,

I forgot to mention that I will be using an interleaved Flyback design with each transformer at 125-150W.

Regards,

Ziad

0 Peter Meaney over 6 years ago in reply to Ziad Yacoub

TI__Mastermind 31580 points

HI Ziad,

The UCC28220 is interleaved controller that you could use for an interleaved flyback but I we do not have any reference designs available.

Is there a TI part that you are thinking of using?

Regards

Peter

0 Ziad Yacoub over 6 years ago in reply to Peter Meaney

Prodigy 120 points

Hi Peter,

I like your suggestion. What if I still want to incorporate an active-clamp design with the UCC2820? What do you recommend I need additional?

Regards,

Ziad

0 Ziad Yacoub over 6 years ago in reply to Ziad Yacoub

Prodigy 120 points

Also, any Spice models available for the UCC28220?

Regards,

Ziad

0 Peter Meaney over 6 years ago in reply to Ziad Yacoub

TI__Mastermind 31580 points

Hi Ziad,

We do not have any spice models for the UCC28220, you could also look at the LM5034 as another option for an active clamp design however I dont think we have any collateral on using this in a flyback circuit.

Regards

Peter

0 Peter Meaney over 6 years ago in reply to Peter Meaney

TI__Mastermind 31580 points

Hi Ziad,

Since that has been no progress on this post for a number of days I am going to close it. If you have more questions please open a new post.

Regards

Peter

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UCC2897A: Solar micro-inverter