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AN937 Datasheet(PDF) 22 Page - STMicroelectronics

No. de pieza AN937
Descripción Electrónicos  The L4971 is a 1.5 A monolithic dc-dc converter
PDF  29 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN937 Datasheet(HTML) 22 Page - STMicroelectronics

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Typical application
AN937
22/29
Doc ID 5655 Rev 15
3.6
Compensation network
The complete control loop block diagram is shown in Figure 29. The error amplifier basic
characteristics are:
gm = 2.5mS
Ro = 1.2M
Ω
Avo = 60dB
Isource/sink = 300
μA
Figure 27.
Output drop (%) vs minimum input voltage
Figure 28.
Block diagram compensation loop
10
15
20
25
30
35
40
45
0
0.5
1
1.5
2
2.5
3
3.5
Cout = 1 x 150uF
Cout = 2 x 150uF
Cout = 3 x 150uF
Vin
A(s)
Vc/Vct
LC
α
+-
VREF
D97IN697
VO
Cout
Resr
D97IN700
L
Ro
gm
Cc
Rc
Co
D97IN698
Avo=gm·Ro



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