L5988D View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

L5988D

4 A continuous (more than 5 A pulsed) step-down switching regulator with synchronous rectification

STMicroelectronics 

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L5988D

Application information

6.4.2

Type II compensation network

In Figure 16 the type II network is shown.

Figure 16. Type II compensation network

The singularities of the network are:

Equation 34

fZ1 = 2------------R--1---5-------C----5-

fP0 = 0

fP1 = 2------------R-----5----1----C-C-------5--5------+--------C--C--------6--6--

In Figure 17 the bode diagram of the PWM and LC filter transfer function (GPW0 · GLC(f))

and the open loop gain (GLOOP(f) = GPW0 · GLC(f) · GTYPEII(f)) are drawn.

Figure 17. Open loop gain: module bode diagram

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