TPS562207: Simulations using Pspice

Ohad Bonneh

Intellectual 790 points

Part Number: TPS562207

Dear Power management team

I’m trying to perform the following simulation:

Im having 2 main problems with it,

When you look at the voltage divider at the right you will see that the division is very odd, the voltage across each resistor should be the same.
If im looking at just a single device (tps562207) and trying to get 1.8V output, no matter what im putting in the voltage divider for the feedback loop im getting the same 1.035V result.

over 2 years ago

0 Ohad Bonneh over 2 years ago

TI__Intellectual 790 points

I've manage to fix the above problem but faced a new one,

when switch on:

why dose the currents (IL2, IR16) are not the same?

0 Nancy Zhang over 2 years ago in reply to Ohad Bonneh

TI__Mastermind 47200 points

Hi Ohad,

I am not sure I can understand your schematic. Please give us more detail. The first TPS562207 GND seems floating and not connected to GND. Did you use two TPS562207 in parallel or in series? Are two TPS562207 working independently in PSpice?

Thanks,

Nancy

0 Ohad Bonneh over 2 years ago in reply to Nancy Zhang

TI__Intellectual 790 points

Hi Nancy,

yes this is true, we are trying to connect several TPS562207 in series -> the ground on each TPS562207 will be the connect to the voltage divider in the right.

this is a current driven approach. please see this link -> https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6136698

currently we are trying to test 3 TPS562207 in series

0 Nancy Zhang over 2 years ago in reply to Ohad Bonneh

TI__Mastermind 47200 points

Hi Ohad,

I am not familiar with this series application. Our China team will be back this Saturday and will continue support. Thanks for your patience!

Thanks,

Nancy

0 Ruby Li over 2 years ago in reply to Ohad Bonneh

TI__Expert 7430 points

Hi Ohad

Since we discuss this by email, I am going to close this threat. Thanks.

Ruby

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TPS562207: Simulations using Pspice