UCC28180: Loop Compensation Computation

Alvin Francisco

Prodigy 190 points

Part Number: UCC28180

In the application note of UCC28180, why do you use VCOMP=2.45V in solving M1 but use VCOMP=3V in solving M2?

over 7 years ago

0 Benjamin Lough over 7 years ago

TI__Mastermind 27135 points

Hi Alvin,

Thanks for your interest in UCC28180. Please use VCOMP=3V for equation 85. This appears to be a typo. With VCOMP = 3V, M1 is equal to .538. This is the value used in equation 90 and 101 for M1.

Best Regards,
Ben Lough

0 Alvin Francisco over 7 years ago in reply to Benjamin Lough

Prodigy 190 points

but with frequency less than 100kHz the M1M2=M1xM2 will not be valid. how are we gonna use the 70kHz frequency?

0 Benjamin Lough over 7 years ago in reply to Alvin Francisco

TI__Mastermind 27135 points

Hi Alvin,

Please use the M1M2 vs VCOMP graph in the UCC28180 calculator:www.ti.com/.../toolssoftware.

Best Regards,
Ben Lough

Power management

Power management forum

UCC28180: Loop Compensation Computation