Dear expert:
Customer want use TPS92641 to drive LD, want to know the Iadj response time or max input frequency. thanks.
Robin
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Dear expert:
Customer want use TPS92641 to drive LD, want to know the Iadj response time or max input frequency. thanks.
Robin
Hello Robin,
The IADJ response time is limited by the bandwidth of the error amplifier which will be approximately equal to gm/2*Pi*Ccomp. The regulator overall closed loop bandwidth is higher since it is hysteretic, but the regulation level set by IADJ can only respond that fast.
Regards,
Clint
The Ccomp should be 0,47uF on EVM board, do you have a reference value for Gm?
Hello Robin,
What is "too large" exactly? With 0.47uF I calculate a crossover frequency of about 170Hz.
Regards,
Clint
Hello Robin,
This appears to be supported directly by our group. Do you mind if I close this thread out if so?
Thanks,
Clint