Other Parts Discussed in Thread: TPS628503, TPS628303, TPS62826, TPS628513
Hello,
My customer is trying to adjust compensation network parameters of TPS54310 with the below document.
Designing With the TPS54310 Synchronous Buck Regulator(SLVA109-December 2001).
They are wondering how to calculate some parameters in Equation 7 to 16.
1.N_C
N_C is used in some equations and which is described as “the number of output capacitors in parallel”.
Doesn’t this N_C depends on the capacitor value?
For example, when using 2 capacitors in parallel for COUT like 22u+22u, 20u+10u, 20u+1u or any combination of 2 capacitor values, is N_C simply “2” for all cases?
2 ESR_MAX
2-a
In Equation 8, ESR_MAX is calculated. When using multiple capacitors in parallel for COUT, how to think about this ESR_MAX?
For example, now C1(ESR=R1) and C2(ESR=R2) in parallel for COUT. What is ESR_MAX in this case?
2-b
In Equation 9 and 10, is this ESR_MAX the value calculated by equation 8? Or Other value? If other value, how to think about it when using multiple capacitors in parallel for COUT?
3 COUT
In Equation 14 and 15, COUT is described as capacitance of a single output capacitor.
Same, question. For example, now C1(ESR=R1) and C2(ESR=R2) in parallel for COUT. What is COUT value in this case?
4 ESR
In Equation 16, ESR is described as the ESR rating of a single output capacitor.
Same, question. For example, now C1(ESR=R1) and C2(ESR=R2) in parallel for COUT. What is ESR value in this case?
Regards,
Oba
