Hi Hirokazu-san,
The TINA-TI export option in WEBENCH exports the start-up test-bench. Hence the test-bench is compatible to perform transient analysis. DC analysis may not work fine.
If you are interested to view steady-state values/results of various node voltages/branch current, you can add voltage/current probes & run transient analysis (Ctrl+Alt+T to run transient analysis) to attached TINA-TI test-bench.
Kindly note that the test-bench has been modified to directly view steady-state results by skipping initial start-up behavior.
/cfs-file/__key/communityserver-discussions-components-files/234/LMZM33606_5F00_steady_2D00_state.TSC
Below are the points to note:
1. Add appropriate Vin, Vout and Iout parameter values based on your input/output conditions as highlighted in below snapshots.
2. In case you export any new design from WEBENCH, kindly replace the TINA-TI macro with the one attached below.
/cfs-file/__key/communityserver-discussions-components-files/234/LMZM33606.TSM
Please follow below steps to replace the Macro in TINA-TI.
a. Delete the existing macro/IC from the exported design. Right click on IC symbol & click on delete as shown below.
b. To add new Macro, go to Insert -> Macro and insert the macro/symbol in the test-bench.
Kindly let us know in case you have any queries.
Thanks & Regards,
Harish
Hi Kawamura-san,
Below are my answers to your queries.
1. How do I analysis Input and output wattage?(I want to know efficiency.)
Harish - In general, efficiency can be calculated as (Vout*Iout) / (Vin*Iin) where Iin is the input current that flows into IC through Vin pin.
But the SPICE models (Electrical models) supported may not provide accurate loss analysis as the power dissipation parameters like quiescent current, MOSFET switching losses etc are not accurately modeled.
You can instead use WEBENCH charts to get the efficiency at different loads, Vin voltage as shown in below snapshot.
2.Do I have to change device macros when I want to analyze a WEBENCH circuit using another device.
If Yes, how do I change a macro?
Harish - When you use export feature from WEBENCH for particular device, there is no need to change the macro if you want to run start-up test-bench.
In my first post, I had to modify the macro so as to directly provide you the steady-state behaviour by skipping the startup behaviour.
There is no generic solution that can help across all the devices to configure start-up test-bench into steady-state test-bench.
Kindly let us know in case you have further queries.
Thanks & Regards,
Harish
