MC33981BPNA Freescale Semiconductor, MC33981BPNA Datasheet - Page 15

• Manufacturer Part Number: MC33981BPNA
• Description: IC SWITCH HI SIDE SINGLE 16-PQFN
• Manufacturer: Freescale Semiconductor
• Type: High Side Switchr

Specifications of MC33981BPNA

• Number Of Outputs: 1
• Rds (on): 4 mOhms
• Internal Switch(s): Yes
• Current Limit: 40A
• Voltage - Input: 6 ~ 27 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-PQFN, 16-PowerQFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Table 6. Functional Truth Table in Fault Mode
Analog Integrated Circuit Device Data
Freescale Semiconductor
Over-temperature
Over-temperature
H = High level
L = Low level
x = Don’t care
on External Low
Side MOSFET
Over-current
Conditions
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 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
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
• 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
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 0V 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 0V.
TEMP at 0V 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 0V, 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 0V.
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
.