33981 查看數據表（PDF） - Motorola => Freescale

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33981

High-Frequency, High-Current, Self-Protected High-Side Switch (4.0 mΩ up to 60 kHz)

Motorola => Freescale 

Freescale Semiconductor, Inc.

Table 1. Functional Truth Table in Normal Mode

Condition

CONF INHS INLS OUT GLS

FS EN

Comments

Sleep

x

x

x

x

x

H

L Device is in Sleep mode. The OUT and

low-side gate are OFF.

Normal

L

H

H

H

H

H

H Normal mode. High side and low side are

controlled independently. The high side

and the low side are both on.

Normal

L

L

L

L

L

H

H Normal mode. High side and low side are

controlled independently. The high side

and the low side are both off.

Normal

H

L

H

L

H

H

H Normal mode. No cross-conduction. Half-

bridge configuration. The high side is off

and the low side is on.

Normal

H

H

L

H

L

H

H Normal mode. No cross-conduction. Half-

bridge configuration. The high side is on

and the low side is off.

Normal

H PWM H PWM PWM

H

OR H

(Logical

OR)

H Normal mode. Cross-conduction

management is activated. Half-bridge

configuration.

H = High level

L = Low level

x = Don’t care

PWM = Pulse-width modulation

Table 2. Functional Truth Table in Fault Mode

Conditions CONF INHS INLS OUT GLS FS EN TEMP CSNS OCLS

Comments

Overtemperature

x

x

x

L

x

L

H

L

x

x The 33981 is currently in fault mode. The

on OUT

OUT is OFF. TEMP at 0 V indicates this

fault. Once the fault is removed 33981

recovers its normal mode.

Overtemperature

x

x

x

L

L

L

H

L

x

x The 33981 is currently in fault mode. The

on CBOOT or GLS

OUT is OFF and GLS is at 0 V. TEMP at

0 V indicates this fault. Once the fault is

removed 33981 recovers its normal mode.

Overcurrent

on OUT

x

H

x

L

x

L

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 200 µs. When INHS goes

to 0 V, CSNS goes to 5.0 V.

Overload

L

x

H

x

L

L

H

x

x

L The 33981 is currently in fault mode. GLS

on External Low-

is at 0 V and OCLS internal current source

Side MOSFET

is off. The external resistance connected

between OCLS and GND terminal will pull

OCLS terminal to 0 V. The fault is reset by

a logic [0] at INLS for at least 200 µs.

H = High level

L = Low level

x = Don’t care

MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA

For More Information On This Product,

Go to: www.freescale.com

33981

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