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

VDD

VPWR

33981

MCU

No current

GND OUT

VPWR

10.0 k

Diode M

Figure 11. Reverse Battery Protection

GROUND (GND) DISCONNECT PROTECTION

If the DC motor module ground is disconnected from load

ground, the device protects itself and safely turns OFF the

output regardless of the output state at the time of

disconnection. A 10 k resistor needs to be added between

the EN pin and the rest of the circuitry in order to ensure the

device turns off in case of ground disconnect and to prevent

exceeding this pin’s maximum ratings.

FAULT REPORTING

This 33981 indicates the faults below as they occur by

driving the FS pin to logic [0]:

• Over-temperature fault

• Over-current fault on OUT

• Overload fault on the external low side MOSFET

The FS pin will return to logic [1] when the over

temperature fault condition is removed. The two other faults

are latched.

33981

18

Analog Integrated Circuit Device Data

Freescale Semiconductor

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