TPS62918: Can the TPS62918 output a negative voltage?

Sveinn Jia

Expert 6840 points

Part Number: TPS62918
Other Parts Discussed in Thread: TPSM82916

Hi Team,

Can the TPS62918 output a negative voltage? For example, 10V to -5V at 6A?

If yes, could you help share the design guide?

Regards,

Sky

1 month ago

0 Sveinn Jia 1 month ago

TI__Expert 6840 points

Hi Team,

The input is 10V, vout is -5V , Iout is 6A.

Regards,

Sky

0 Britton Jones 1 month ago in reply to Sveinn Jia

TI__Genius 10466 points

Hello Sky,

Yes the TPS62918 can support 10V to -5V @ 6A. Please be aware that 6A is right on the upper limit of current capability in IBB. I estimate that at 2.2MHz fsw and 1uH inductor you will be pushing about 10.8A peak inductor current. The minimum limit spec is 11A. I am using worst case efficiency to estimate this so you should be okay and you could tune the inductor for a little more headroom if needed

Here is an app note for IBB design of another device in the same family https://www.ti.com/lit/ug/slvuc22/slvuc22.pdf?ts=1772205553170&ref_url=https%253A%252F%252Fwww.ti.com%252Ftool%252FTPS62913-IBB-EVM

Best regards,

Britton

0 Sveinn Jia 1 month ago in reply to Britton Jones

TI__Expert 6840 points

Hello Britton,

Thanks for your help.

I want to confirm that can we achieve 1mV peak ripple with 20MHz bandwidth under VIN=10V Vout=-5V, Iout=6A? Do the filters require a special design? Can you help with simulation and evaluation for verification？
May I check do we have TPSM82918? If it involves the NDA, you can send email with me. Sky-jia@ti.com.
I would like to confirm whether the TPSM82916 and TPS62918 can be used in parallel or stacked configurations.

Regards,

Sky

0 Britton Jones 1 month ago in reply to Sveinn Jia

TI__Genius 10466 points

Hello Sky,

1. No the filter does not require special design, with the exception of the IBB modifications

2. We only have a module in the 6A package, TPSM82916

3. The device is not stackable

I will reach out over email to further discuss this opportunity. Closing this thread

Best regards,

Britton

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TPS62918: Can the TPS62918 output a negative voltage?