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L4990AD 数据表(PDF) 19 Page - STMicroelectronics

部件名 L4990AD
功能描述  PRIMARY CONTROLLER
PDF  24 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L4990AD 数据表(HTML) 19 Page - STMicroelectronics

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D97IN506
L4990
PGND
ISEN
OUT
VC
VIN
9
10
13
11
8
VCC
Figure 35. Bipolar Transistor Drive
D97IN507
+
-
EA
Ri
+
1.3mA
Rd
R
2R
12
Cf
Rf
6
5
From VO
2.5V
+
-
EA
RP
+
1.3mA
Rd
R
2R
12
Cf
Rf
6
5
From VO
2.5V
Error Amp compensation circuit for stabilizing any current-mode topology except
for boost and flyback converters operating with continuous inductor current.
CP
Ri
Error Amp compensation circuit for stabilizing current-mode boost and flyback
topologies operating with continuous inductor current.
VFB
VFB
COMP
COMP
SGND
SGND
Figure 36. Typical E/A compensation networks.
L4990 - L4990A
19/24



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