LM5157: Asking guidance looking for TI dual DC supply solution with wide input range, +/-15V @ 33mA

ArTzy

Genius 17385 points

Part Number: LM5157
Other Parts Discussed in Thread: LM5155, , LM5175

Tool/software:

Hi Experts,

Would like to ask guidance from PL to offer suitable TI device for dual DC/DC outputs with the following requirements:

Vin range: 4.5V to 28V
Outputs: +/-15 at 33mA

This can be isolated or non-isolated. Would have to be a buck-boost, SEPIC, or flyback capable of running on the full input voltage range (i.e lm5157, lm5155 and etc). We wanted this to run off a 5v, 12v, or 24v supply, can limit it to a 12v and 24v supply instead. Could also boost up to over 28 volts and couple the inductor with + and - outputs.

Any solution to offer is highly appreciated.

Thank you.

Regards,
Archie A.

2 months ago

0 Stefan Schauer 2 months ago

TI__Guru 58521 points

HI Archie,

i have changed the device to the LM5157 (assume the LM5175 was a typo as a 4 switch buck boost does not fit for this application)

and forwarded it to the responsible support team.

Best regards,

Stefan

0 Mounika Girish 2 months ago in reply to Stefan Schauer

TI__Intellectual 2426 points

HI Archie,

Thank you for using e2e forum.

Sending the reference design with LM5155 ( controller) used as SEPIC https://www.ti.com/tool/PMP40488

It can be used in Flyback topology as well.

Please let me know if you have further questions.

Best regards,

Mounika

0 ArTzy 2 months ago in reply to Mounika Girish

TI__Genius 17385 points

Hello Mounika,

Thank you.

Just to confirm, it can operate in the range of 4.5V to 28V input, correct?

Regards,
Archie A.

+1 Mounika Girish 2 months ago in reply to ArTzy

TI__Intellectual 2426 points

Hi Archie,

I sent the design for your reference and can be adjusted to your specifiations. Please use the QS calculator https://www.ti.com/tool/download/SNVR512 and https://www.ti.com/tool/POWERSTAGE-DESIGNER to estimate and visualise on the recommeded parameters.

Best regards,

Mounika

0 ArTzy 2 months ago in reply to Mounika Girish

TI__Genius 17385 points

Hello Mounika,

Apology but I accidentally clicked the resolved button but still need clarification.

You LM5155 recommended solution, however shared design references from LM5157.

Just to clarify that we are looking for best solution from TI that you can offer based on the specification provided on this post, can operate from 4.5V to 28Vin, power size is most important (+/-15V,33mA).

For your further assistance. Thank you.

Regards,
Archie A.

0 Mounika Girish 2 months ago in reply to ArTzy

TI__Intellectual 2426 points

Hi Archie,

LM5157 can be used for the specifications mentioned - 4.5V to 28Vin, power size is most important (+/-15V,33mA).

Is this what needs to be clarified?

Best regards,

Mounika

Power management

Power management forum

LM5157: Asking guidance looking for TI dual DC supply solution with wide input range, +/-15V @ 33mA