8

®

ISO124

FIGURE 5. Battery Monitor for a 600V Battery Power System. (Derives input power from the battery.)

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 and AB-034.

V

IN

V

Isolation Barrier

ISO124

+V

S2

+V

S1

–V

S1

±V

S1

–V

S2

Gnd2

Gnd1

R

1

4.75k

Ω

R

2

9.76k

Ω

1µF

1µF

1µF

1µF

10µH

10µH

±V

S2

10µH

10µH

1µF

1µF

1µF 1µF

C

1

220pF

C

2

1000pF

OPA237

15

1

9

10

7

2

e

8

–V

16

+V

15

1

9

10

7

2

10k

Ω

8

–V

16

+V

10k

Ω

e

e

e

10k

Ω

10k

Ω

Charge/Discharge Control

INA105

25k

Ω

25k

Ω

25k

Ω

25k

Ω

2

3

1

e

50

V =

2

+V –V

74

5

6

e

1

V =

2

Control

Section

ISO124

This Section Repeated 49 Times.

ISO124