LT1943 Ver la hoja de datos (PDF) - Linear Technology
Número de pieza
componentes Descripción
Fabricante
LT1943 Datasheet PDF : 20 Pages
| |||
BLOCK DIAGRA
VIN
VIN
15
16
C1
VLOGIC
AVDD
R2
FB1
4
R1
PGOOD
23
R14
MASTER
OSCILLATOR
1.2MHz
R6
R5
C9
FB2
5
CT
25
1.12V
20µA
1.125V
SLOPE
FOLDBACK
COMPENSATION
OSCILLATOR
Σ+
1.25V
–
gm
+
–
gm
+
1.25V
FOLDBACK
OSCILLATOR
–
R
SQ
–
+
R
SQ
Σ
SLOPE
COMPENSATION
DRIVER
DRIVER
RUN-SS
18
C5
VIN
1.7µA
INTERNAL
REGULATOR
AND
REFERENCE
SS-234
1.7µA
SW2
17
SW3
SW4
C4
LOCKOUT
R9
VE3
R8
FB3
6
BIAS
2.8V
VON
VON
26
C15
–
gm
+
1.25V
FOLDBACK
OSCILLATOR
–
gm
+
1.25V
FOLDBACK
OSCILLATOR
1.1V
GND SGND GND
GND
1
11
20
29
–
+
R
SQ
DRIVER
Σ
SLOPE
COMPENSATION
–
+
R
SQ
DRIVER
Σ
SLOPE
COMPENSATION
LT1943
BOOST
D2
12
2.4A
SWITCH SW1
13
14
C3
L1
D1
C2
VC1
2
C20
VC2
3
C21
2.6A
SWITCH
BIAS
22
27
SW2
28
C16
R10
C11
R11
C12
L2
D5
L3
C8
VLOGIC
VIN
AVDD
FB4
8
NFB4
C24
7
VC4
10
C23
R13
C14
400mA
SWITCH
SW4
19
C7
L4
D6
D3 C6
R4
R3
VLOGIC
VOFF
VC3
9
C22
R12
C13
SW3
L5
21
VIN
400mA
SWITCH
E3
24
VE3
C10
Figure 1. Block Diagram
1943fa
9
Share Link: 