OTHER APPLICATION NOTES

DUMP PROTECTION

Load dump protection must be implemented by an

external zener if this function is necessary. In fig. 4

tween pin 6 and 7 protects the output transistor of

input (pin 3) and Hall-effect sensor.

load dump.

OVERVOLTAGE LIMITATION

The external darlington collector voltage is sensed

work is mandatory for stability during the high vol-

tage condition.

application.

overvoltage even when supply voltage is discon-

nected during the high voltage condition.

REVERSE BATTERY PROTECTION

Due to the presence of external impedanceat pin 6,

3, 16, 15 L497 is protected against reverse battery

voltage.

NEGATIVE SPIKE PROTECTION

If correct operation is requested also during short

be used.

Figure 4 : Application Circuit.

L497

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