33981 查看數據表（PDF） - Freescale Semiconductor

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33981

Single High Side Switch (4.0 mOhm), PWM clock up to 60 kHz

Freescale Semiconductor 

FUNCTIONAL DEVICE OPERATION

PROTECTION AND DIAGNOSTIC FEATURES

Table 7. Functional Truth Table in Fault Mode

Conditions CONF INHS INLS OUT GLS FS

Over-temperature x

x

x

L

H

L

on OUT

Over-temperature x

x

x

L

L

L

on GLS

Over-current

x

H

L

L

x

L

on OUT

Overload

L

L

H

x

L

L

on External Low

Side MOSFET

H = High level 

L = Low level 

x = Don’t care

EN TEMP CSNS OCLS

Comments

H

L

x

x The 33981 is currently in Fault mode.

The OUT is OFF. TEMP at 0V

indicates this fault. Once the fault is

removed 33981 recovers its normal

mode.

H

L

x

x The 33981 is currently in Fault mode.

The OUT is OFF and GLS is at 0V.

TEMP at 0V indicates this fault. Once

the fault is removed 33981 recovers its

Normal Mode.

H

x

L

x The 33981 is currently in Fault mode.

The OUT is OFF. It is reset by a

logic [0] at INHS for at least tRST(DIAG).

When INHS goes to 0V, CSNS goes to

5.0 V.

H

x

x

L The 33981 is currently in Fault mode.

GLS is at 0 V and OCLS internal

current source is off. The external

resistance connected between OCLS

and GND pin will pull OCLS pin to 0V.

The fault is reset by a logic [0] at INLS

for at least tRST(DIAG).

Analog Integrated Circuit Device Data

Freescale Semiconductor

33981

19

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