16

Gnd

V

IN

V–

V+

V+

V–

V

O

Gnd

15

1

2

1

2

10

9

7

8

Input

Section

Output

Section

5

6

7

V

IN

Input

Gnd

+15V

–15V

–15V, 20mA

+15V, 20mA

Auxiliary

Isolated

Power

Output

Output

Gnd

V

O

ISO124

0.47µF

0.47µF

0.47µF

DCP011515DB

or

DCV011515D

17

ISO124

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SBOS074E – SEPTEMBER 1997 – REVISED JUNE 2018

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Copyright © 1997–2018, Texas Instruments Incorporated

Typical Applications (continued)

8.2.7 Input-Side Powered ISO Amplifier

The user side of the ISO124 device can be powered from the high voltage side using an isolated DC-DC

converter as shown in Figure 22.

Figure 22. Input-Side Powered ISO Amplifier Schematic