TPS51220A/about Inverting circuit

Tsukui Yusuke

Guru 21930 points

Other Parts Discussed in Thread: TPS51220A, TPS51220

Hi,

Could you tell me about way to use TPS51220A?
Is the device can be used for inverting circuit?
Please check the attached file.
DCDC-inv(tps51220).pdf
Customer is considering this circuit.
Could you give me your advice?

Best Regards,
Yusuke/Japan Disty

over 8 years ago

0 Tsukui Yusuke over 8 years ago

Guru 21930 points

Hi,

Can I get the information?
If you need more information or if I should clarify my comment ,
please let me know.

Best Regards,
Yusuke/Japan Disty

0 Bill Lin over 8 years ago

TI__Prodigy 500 points

refer to the attachment

slva257a.pdf

0 Tsukui Yusuke over 8 years ago in reply to Bill Lin

Guru 21930 points

Bill-san,

Thank you for sending me the documents.
Let me ask you one more thing.
Please tell me the notes when using this device at the inverting circuit.
And, Could you tell me the pin processing method when use TPS51220A by inverting circuit.

Best Regards,
Yusuke/Japan Disty

0 Bill Lin over 8 years ago in reply to Tsukui Yusuke

TI__Prodigy 500 points

Hi,

if you choose . Inverting Buck-Boost Topology, then since TPS51220A is a synchronous buck regulator controller

the LS FET is not needed to connect, the rest of the regulation circuit can refer to the typical application circuit in datasheet

you can send me the schematic for further review after design done

0 Tsukui Yusuke over 8 years ago in reply to Bill Lin

Guru 21930 points

Bill-san,

Thank you for your kind support and comment.
When I got to the circuit diagram from the customer, and then report to you.

This device is compatible with the TINA TI and SPICE model.
Is it possible to evaluate the inverting circuit in this model?

Best Regards,
Yusuke/Japan Disty

0 Bill Lin over 8 years ago in reply to Tsukui Yusuke

TI__Prodigy 500 points

sure

0 Tsukui Yusuke over 8 years ago in reply to Bill Lin

Guru 21930 points

Bill-san,

Thank you for your response.
I made a inverting circuit with a TINATI.
However,Simulation does not work.
Does TINATI fix GND(0V)?
Could you give me your advice?

Best Regards,
Yusuke/Japan Disty

0 Bill Lin over 8 years ago in reply to Tsukui Yusuke

TI__Prodigy 500 points

sbou052a.pdfHi,

0 Tsukui Yusuke over 8 years ago in reply to Bill Lin

Guru 21930 points

Bill-san,

Thank you for sending the reference.
I want to know about the GND of the device.
Is this GND fixed?

Best Regards,
Yusuke/Japan Disty

0 Bill Lin over 8 years ago in reply to Tsukui Yusuke

TI__Prodigy 500 points

yes, please choose the GND symbol from TINA and connect it to GND pin of tps51220a

0 Tsukui Yusuke over 8 years ago in reply to Bill Lin

Guru 21930 points

Bill-san,

Thank you for your information.
"yes, please choose the GND symbol from TINA and connect it to GND pin of tps51220a"
Let me make sure I understand you correctly.
You mean "This simulation model can not make an inverting circuit".
Is my understanding of this correct?

Best Regards,
Yusuke/Japan Disty

0 JohnTucker over 8 years ago in reply to Tsukui Yusuke

TI__Guru**** 191445 points

All the TINA models that I know of are hard coded so that GND is ground internally. This prevents them form being used in the inverting buck boost configuration. There may be exceptions, but not that I know of.

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TPS51220A/about Inverting circuit