mc33981bpna/r2 Freescale Semiconductor, Inc, mc33981bpna/r2 Datasheet - Page 15

• Manufacturer Part Number: mc33981bpna/r2
• Description: Single High-side Switch 4.0 M , Pwm Clock Up To 60khz
• Manufacturer: Freescale Semiconductor, Inc

Table 6. Functional Truth Table in Fault Mode
Analog Integrated Circuit Device Data
Freescale Semiconductor
H = High level
L = Low level
x = Don’t care
Overtemperature
Overtemperature
on External Low-
Side MOSFET
Conditions
Overcurrent
Overload
on OUT
on OUT
on GLS
MCU
V
DD
Figure 11. Reverse Battery Protection
No current
CONF INHS
x
x
x
L
10.0 kΩ
H
x
x
L
V
V
PWR
PWR
GND
INLS
33981
H
x
x
L
OUT
OUT
Diode
L
L
L
x
GLS
H
L
L
x
M
FS
L
L
L
L
EN
H
H
H
H
GROUND (GND) DISCONNECT PROTECTION
ground, the device protects itself and safely turns OFF the
output regardless of the output state at the time of
disconnection. A 10k 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
driving the FS pin to logic [0]:
temperature fault condition is removed. The two other faults
are latched.
If the DC motor module ground is disconnected from load
This 33981 indicates the faults below as they occur by
• Overtemperature fault
• Overcurrent fault on OUT
• Overload fault on the external low-side MOSFET
The FS pin will return to logic [1] when the over
TEMP CSNS OCLS
L
L
x
x
L
x
x
x
PROTECTION AND DIAGNOSTIC FEATURES
x
x
x
L
The 33981 is currently in fault mode.
The OUT is OFF. TEMP at 0 V
indicates this fault. Once the fault is
removed 33981 recovers its normal
mode.
The 33981 is currently in fault mode.
The 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.
The 33981 is currently in fault mode.
The OUT is OFF. It is reset by a
logic [0] at INHS for at least
When INHS goes to 0 V, CSNS goes to
5.0 V.
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 0 V.
The fault is reset by a logic [0] at INLS
for at least
FUNCTIONAL DEVICE OPERATION
t
RST(diag)
Comments
.
t
RST(diag)
33981
15
.