Datasheet

LTC6421-20
12
642120fb
APPLICATIONS INFORMATION
642020 F04b
R7
OPT
R5
[2]
R9
[2]
C25
0.1μF
C22
0.1μF
C22
[1]
••
C21
[1]
C22
0.1μF
+INA
–INA
R11
OPT
R10
[2]
R12
[2]
C34
0.1μF
C31
[1]
C30
0.1μF
••
C30
0.1μF
C22
[1]
–INB
+INB
C18
0.1μF
C19
0.1μF
V
+
C18
0.1μF
C19
0.1μF
V
+
V
+
R1
1.21k
1%
R2
1k
1%
V
+
R16
1.21k
1%
R18
1k
1%
C16
0.1μF
TD4
V
OCMA
TD5
GND
TD3
GND
TD2
V
+
2.85V TO
3.5V
C35
1000pF
C32
1000pF
C30
0.1μF
C34
[1]
C17
[1]
C28
0.1μF
TD1
V
OCMB
R5
[1]
R3
1.5k
1%
V
+
V
+
R17
1.5k
1%
C43
0.1μF
1
2
3
5
4
12
12
T2
TCM4-19+
C39
0.1μF
+OUTA
–OUTA
C35
[1]
C40
0.1μF
C32
0.1μF
C41
[1]
R14
[1]
C44
0.1μF
1
2
3
5
4
12
12
T4
TCM4-19+
–OUTB
+OUTB
+INA
–INA
V
–
V
–
–INB
+INB
–OUTA
V
+
A
V
–
V
–
V
+
B
–OUTB
V
+
AV
OCMA
+OUTAENABLEA
V
+
BV
OCMB
+OUTBENABLEB
C42
0.1μF
C14
4.7μF
C15
1μF
V
+
VERSION
–A
–B
U1
LTC6420CUDC-20
LTC6421CUDC-20
R5, R9, R10, R13
NONE
NONE
T1, T3
TCM4-19+
TCM4-19+
NOTES: UNLESS OTHERWISE SPECIFIED
[1] DO NOT STUFF
[2]
R4
88.7
R5
88.7
R12
88.7
R15
88.7
ENA
JP1
DIS
EN
3
4
5
6
2
116
15
14
13
12
11
21 7 8 9 10
20 19 18 17
1
2
3
V
+
ENB
JP2
DIS
EN
1
2
3
J1
J2
J5
J7
J3
J4
J6
J8
1
2
3
5
4
1
2
3
5
4
12
12
12
12
12
[2]
T2
[2]
T1
U1
[2]
LTC6421-20
Figure 4b. Demo Circuit 1299 Schematic (Test Circuit A)