L5983 데이터 시트보기 (PDF) - STMicroelectronics

부품명

상세내역

제조사

L5983

2A step-down switching regulator

STMicroelectronics 

Application informations

L5983

In Figure 10 the type III compensation network is shown. This network introduces two zeros

(fZ1, fZ2) and three poles (fP0, fP1, fP2). They expression are:

Equation 16

fZ1

=

-----------------------1-------------------------,

2π ⋅ C3 ⋅ (R1 + R3)

fZ2

=

--------------1---------------

2π ⋅ R4 ⋅ C4

Equation 17

fP0 = 0,

fP1

=

--------------1--------------- ,

2π ⋅ R3 ⋅ C3

fP2

=

---------------------1----------------------

2π

⋅

R4

⋅

-C-----4----⋅---C-----5--

C4 + C5

Figure 10. Type III compensation network

In Figure 11 the Bode diagram of the PWM and LC filter transfer function (GPW0 · GLC(f))

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

Figure 11. Open loop gain: module Bode diagram

20/37

Share Link: