Isolation Barrier
13kΩ
100pF
V
IN
13kΩ
ISO122
–V
S2
Gnd
+V
S2
–V
S1
+V
S1
10µH
1µF
1µF
1µF 1µF
10µH
±V
S1
10µH
1µF
10µH
±V
S2
Gnd
4700pF
385Ω
2
–
6
OPA602
V
OUT
= –V
IN
3
+
1µF
1µF 1µF
FIGURE 4. Optional
π
Filter to Minimize Power Supply Feedthrough Noise; Output Filter to Remove 500kHz Carrier Ripple.
For more information concerning output filter refer to AB-023.
This Section Repeated 49 Times.
ISO122P
10kΩ
e
1
= 12V
10kΩ
15
8
10
e
2
= 12V
2
16
–V
Multiplexer
1
+V
9
7
V = e
1
2
Control
Section
Charge/Discharge
Control
ISO122P
+V
e
49
=12V
15
1
+V
9
e
50
=12V
10kΩ
2
16
1
8
10
–V
3
25kΩ
25kΩ
–
+
7
2
25kΩ
7
–V
4
25kΩ
5
INA105
6
V = e
50
2
10kΩ
FIGURE 5. Battery Monitor for a 600V Battery Power System. (Derives Input Power from the Battery.)
®
ISO122
8
TI [ TEXAS INSTRUMENTS ]
