TPS7A33: TINA simulation is not working when float its ground

Jingquan Zhu

Prodigy 440 points

Part Number: TPS7A33

Tool/software:

hi team

i use TPS7A33 to design a high minus power filter via float its ground. Vin = -50V, output -48V.

in circuit battery only set to 0, it works. set +/-V will not work. why?

please help.

Low side LDO.TSC

over 1 year ago

+1 Nick Butts over 1 year ago

TI__Guru 50025 points

Hi,

Sorry for the delay in response.

The model does not work because the circuit inside is ground-referenced, so floating the GND pin is not possible since it is already grounded. I can't alter the TINA model because I don't have access to its design files. I could attempt to alter the netlist to float the ground if that would be helpful.

Regards,

Nick

0 Jingquan Zhu over 1 year ago in reply to Nick Butts

TI__Prodigy 440 points

got it. i do know how to revise it. thanks.

Power management

Power management forum

TPS7A33: TINA simulation is not working when float its ground