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PRINCIPLES OF OPERATION<br />

REV.A<br />

AC<br />

OC<br />

P.G.<br />

I<br />

I Osec.more<br />

1<br />

I<br />

I<br />

,<br />

I ..., I<br />

I I I -~<br />

I<br />

I<br />

I<br />

I<br />

\<br />

I<br />

I<br />

I<br />

I<br />

I<br />

Power ON<br />

I<br />

I<br />

I<br />

I<br />

I<br />

I<br />

Power<br />

OFF<br />

20 msec more<br />

(When ACl00V)<br />

'\1msec<br />

more<br />

FIGURE 2-2-23. TIMING CHART OF POWER GOOD SIGNAL<br />

TABLE 2-2-1.<br />

FUNCTION OF PREVENTION CIRCUIT<br />

Detecting voltage or<br />

Detecting current<br />

Condition after<br />

detecting<br />

Overvoltage<br />

detector<br />

+ SV<br />

+12V<br />

-12V<br />

- SV<br />

5.5 volts - 7.0 volts Cut all output off.<br />

To recuperate<br />

condition, turn off<br />

AC, then on after<br />

30 seconds.<br />

Overcurrent<br />

prevention<br />

circuit<br />

+ SV<br />

+12V<br />

-12V<br />

- SV<br />

3sA<br />

16A<br />

3A<br />

3A<br />

Cut all output off.<br />

To recuperate<br />

condition, turn off<br />

AC, then on after 30<br />

seconds.<br />

2-16

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