TPS568215: EVM User's Guide Loop Characteritics

Hi,

The injection resistor value and injection swing level are just determined by measurement equipment, but the loop test result won't change using different equipment. It's difficult to identify which one was in use.

Iven-san,

I would like to know the your test condition when you measured Figure 7 result of EVM User's Guide.
Don't you have your measurement condition?

Best Regards,
Kohei Sasaki

Hi,

We don't have the exact measurement condition about Fig 7 becasue it's measured during device development and not measured by us.

Here I attached another bode plot for your reference:

Equipment: AP300;

Setup: TPS568215EVM with described test conditions;

AC injection: fs<1kHz---300mV; 1k-10kHz----linear decreased from 300mV to 30mV; fs>10kHz 30mV

R6=20 Ohm

Vincent-san,

Thank you for your reply.

Is drop of phase curve at about 10kHz to 20kHz is due to insufficiency of injection amplitude level?

Best Regards,
Kohei Sasaki