Hi Expert,
The electrical specification is Vin=12V, Vout=0.8V, Fsw=315KHz, Ramp=R*2, Iout_max=17A.
As you know, higher loop bandwidth improves transient response.
Please see my measurement results of bode plot as below figure. (Injection resistor=10ohm)
The measured bandwidth around 100KHz which is 1/3 switching frequency.
I also measurement the transient response for double check the bandwidth. The result as shown below figure. (Load step: 8.5A-17A, Slew rate: 2.5A/us)
Through the calculation, bandwidth=1/(4*tp)=> BW should be 10KHz. It confuses me.
What is the correct bandwidth of this circuit?
Is that BW=1/3fsw acceptable? Have any side effect?
Looking forward to your feedback.
Cheers,
Muhsiu.
