SLVUBB4 User guide

SLVUBB4B November 2017 – February 2023

#T5147377-98 is a schematic of a Type II compensation network.

Figure 12-2 Schematic of a Type II Compensation Network

Type II with feed forward:

Equation 93.

G_{E A} (s) = \frac{A_{V M} \times \frac{ω_{Z E A}}{s} \times (1 + \frac{s}{ω_{Z E A}}) \times (1 + \frac{s}{ω_{Z F F}})}{(1 + \frac{C_{H F}}{C_{C O M P}}) \times (1 + \frac{s}{ω_{H F}})}

Equation 79.

G_{F B} (s) = \frac{A_{V M} \times \frac{ω_{Z E A}}{s} \times (1 + \frac{s}{ω_{Z E A}}) \times (1 + \frac{s}{ω_{Z F F}})}{\frac{R_{F B B}}{R_{F B B} + R_{F B T}} \times (1 + \frac{C_{H F}}{C_{C O M P}}) \times (1 + \frac{s}{ω_{H F}})}

Type II:

Equation 80.

G_{E A} (s) = \frac{A_{V M} \times \frac{ω_{Z E A}}{s} \times (1 + \frac{s}{ω_{Z E A}})}{(1 + \frac{C_{H F}}{C_{C O M P}}) \times (1 + \frac{s}{ω_{H F}})}

Equation 81.

G_{F B} (s) = \frac{A_{V M} \times \frac{ω_{Z E A}}{s} \times (1 + \frac{s}{ω_{Z E A}})}{\frac{R_{F B B}}{R_{F B B} + R_{F B T}} \times (1 + \frac{C_{H F}}{C_{C O M P}}) \times (1 + \frac{s}{ω_{H F}})}

Compensation zero:

Equation 82.

ω_{Z E A} = \frac{1}{R_{C O M P} \times C_{C O M P}}

Compensation pole:

Equation 83.

ω_{H F} = \frac{1}{R_{C O M P} \times C_{H F}}

With additional feed-forward capacitor in parallel with R_FBT:

ω_{Z F F} = \frac{1}{R_{F B T} \times C_{F F}}

Equation 84.

ω_{P F F} = \frac{1}{\frac{1}{(\frac{1}{R_{R F B B}} + \frac{1}{R_{R F B T}})} \times C_{F F}}