MC3392T-1 데이터 시트보기 (PDF) - Motorola => Freescale

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MC3392T-1

Low Side Protected Switch

Motorola => Freescale 

MC3392

APPLICATIONS INFORMATION

Solenoid Driver

The MC3392 can be used to drive a variety of solenoid

applications similar to that of Figure 15. For example; driving

a solenoid having an inductance of 73.8 mH and a resistance

of 95 Ω from a 12 V supply will cause 240 mA of sink current

to flow with the MC3392 in the ON state. The resulting current

value is within the normal load current operating region and

will not produce a fault. Load current is paramount in any

design using the MC3392 and must be less than ISC for

acceptable operation. If the load current is greater than ISC, a

current limit fault state will exist. Operation in this state is not

destructive as the device will turn off if the Junction

Temperature (TJ) rises above 150°C. When the Junction

Temperature cools below 150°C the device will again

turn–on, with a repeat of the cycle. Careful design to

acceptable load current limits should be insured for

satisfactory operation of an application.

Figure 15. Solenoid Driver

Vin CMOS Input

+

5.0V

–

Fast

Turnoff

Thermal

Shutdown

MC3392

Current

Limit

Over

Voltage

Detect

Gnd

Vout

Solenoid

+

12V

–

1.0k

Fault

+

5.0V

–

8

MOTOROLA ANALOG IC DEVICE DATA

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