MC33580BAPNA Freescale, MC33580BAPNA Datasheet - Page 20

• Manufacturer Part Number: MC33580BAPNA
• Manufacturer: Freescale

Specifications of MC33580BAPNA

• Switch Type: High Side
• Power Switch Family: MC33580
• Input Voltage: 6 to 27V
• Power Switch On Resistance: 30mOhm
• Number Of Outputs: 4
• Mounting: Surface Mount
• Supply Current: 20mA
• Package Type: Power QFN
• Operating Temperature (min): -40C
• Operating Temperature Classification: Automotive
• Pin Count: 24
• Lead Free Status / RoHS Status: Compliant

OVERCURRENT FAULT (LATCHING)
detection levels (I
high detection levels (I
The two selectable, simultaneously active overcurrent
detection levels, defined by I
Figure
levels (I
overcurrent low detection level and the overcurrent condition
exceeds the programmed overcurrent time period (t
device will latch the output OFF.
then the device will immediately latch the fault and turn OFF
the output, regardless of the selected t
until the device is commanded OFF and then ON again.
OVERVOLTAGE FAULT (NON-LATCHING)
fault (OVF) condition on the V
the OFF state until the overvoltage condition is removed.
When experiencing this fault, the OVF fault bit is set in the bit
D1 and cleared after either a valid SPI read or a power reset
of the device.
(bit OV_DIS). When disabled, the returned SO bit OD13 still
reflects any overvoltage condition (overvoltage warning).
20
33580
FUNCTIONAL DEVICE OPERATION
PROTECTION AND DIAGNOSTIC FEATURES
The 33580 has eight programmable overcurrent low
If the load current level ever reaches the selected
If at any time the current reaches the selected I
For both cases, the device output will stay off indefinitely
The 33580 shuts down the output during an overvoltage
The overvoltage protection can be disabled through SPI
6, page 14. The eight different overcurrent low detect
OCL0
: I
OCL7
OCL
) are illustrated in
) and two programmable overcurrent
OCH
) for maximum device protection.
OCH
PWR
and I
pin. The output remains in
Figure
OCL
och
driver.
, are illustrated in
6.
OCH
OC
x
level,
), the
UNDERVOLTAGE SHUTDOWN (LATCHING OR
NON-LATCHING)
6.0 V. As long as the V
specified range, the internal logic states within the device will
be sustained.
undervoltage threshold (VPWRUV) output will turn off, FS will
go to logic 0, and the fault register UVF bit will be set to 1.
recovers :
(bit UV_dis = 1). In this case, the FS does not report any
undervoltage fault condition, UVF bit is set to 1, and the
output state is not changed as long as the battery voltage
does not drop any lower than 2.5 V.
available under V
The output(s) will latch off at some battery voltage below
In the case where battery voltage drops below the
Two cases need to be considered when the battery level
• If outputs command are low, FS will go to logic 1 but the
• If the output command is ON, then FS will remain at
The undervoltage protection can be disabled through SPI
In case of V
UVF bit will remain set to 1 until the next read operation
(warning report).
logic 0. The output must be turned OFF and ON again
to re-enable the state of output and release FS. The
UVF bit will remain set to 1 until the next read operation.
PWR
DD
is missing, the daisy chain feature is
in nominal conditions.
Analog Integrated Circuit Device Data
DD
level stays within the normal
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