L6364 datasheet(34/60 Pages) STMICROELECTRONICS

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Thermal shutdown

The STATUS:SOT status bit is a filtered version of the output of the temperature sensor. When the L6364

temperature exceeds the threshold this bit is set to '1', when the temperature is below the threshold the bit is set

to '0'. The trip threshold is determined by the set-point in register THERM:TH[4:0] as shown in Figure 12.

Figure 12. L6364 thermal shutdown configuration

-40

120

160

200

240

280

TEMPERATURE (°C)

trip threshold

θ=(80-THERM : Th[4:0]*4)*2.7

release threshold

with THERM : AUT='0'

↔ θHYST

If the trip threshold is exceeded, the output switches are disabled, the event is signaled to the microcontroller via

the status register (STATUS:SOT) and an interrupt is generated.

15.1

Automatic operation

If the THERM:AUT bit is '0' and a temperature in excess of the set point is reached, then the threshold is

automatically moved to a release threshold ΘHYST below the set point. When the temperature falls below this

release threshold, the L6364 returns to a normal operating state and returns the threshold to the original level.

L6364

Thermal shutdown

DS13363 - Rev 4

page 34/60

L6364 数据表(PDF) 34 Page - STMicroelectronics