TPS61175: Isolated flyback Design

Tamio Yokokura

Expert 3560 points

Part Number: TPS61175
Other Parts Discussed in Thread: LM5155

TPS61175 support team,

I would like to design the isolated flyback circuit using TPS61175 based on the following system requirement.

Input Voltage = 5V
Output Voltage = 12V
Output Current = 1.0Arms, 2.8Apeak
Isolated

Are there any calculation tool for calculating the constant value of the peripheral parts?

Thanks

Tamio

over 2 years ago

0 Yichen Xu over 2 years ago

TI__Expert 4760 points

Hi Tamio,

We don't have the calculation tool but you can refer these AN for calculation:

https://www.ti.com/lit/an/slyt323/slyt323.pdf?ts=1631674234655&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTPS61175%253FkeyMatch%253DTPS61175%2526tisearch%253Dsearch-everything%2526usecase%253DGPN

https://www.ti.com/lit/an/slva496/slva496.pdf?ts=1631674269050&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTPS61085%253FkeyMatch%253DTPS61085%2526tisearch%253Dsearch-everything%2526usecase%253DGPN

0 Yichen Xu over 2 years ago

TI__Expert 4760 points

Hi Tamio,

For TPS61175, the current limit is not high enough for your application. In fact, we don't have one FET converter that can support such high current. You need to consider Boost controllers like LM5155.

0 Tamio Yokokura over 2 years ago in reply to Yichen Xu

TI__Expert 3560 points

Hi, Yichen

I suggested LM5155x to customer.

Thanks

Tamio

Power management

Power management forum

TPS61175: Isolated flyback Design