MC10XS3412DHFK Freescale Semiconductor, MC10XS3412DHFK Datasheet - Page 30

• Manufacturer Part Number: MC10XS3412DHFK
• Description: Power Switch ICs - Power Distribution Eswitch Gen3 1012
• Manufacturer: Freescale Semiconductor

Specifications of MC10XS3412DHFK

• Rohs: yes
• Number Of Outputs: 4
• Operating Supply Voltage: 6 V to 20 V
• Supply Current (max): 20 mA
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Package / Case: PQFN-24
• Minimum Operating Temperature: - 40 C

PROTECTIONS
Overtemperature Fault
and shutdown circuitry for each output structure.
temperature is higher than T
register will be set to [1]. The fault bits will be cleared in the
status register after a SPI read command.
Overcurrent Fault
protect each output structure against resistive short-circuit
condition. This protection is composed by eight predefined
current levels (time dependent) to fit Xenon-HID manners by
default or, 55 W or 28 W bulb profiles, selectable separately
by Xenon bit and 28 W bits (as illustrated
page 36).
will be huge. fault_control signal transition from logic [0] to [1]
or an autoretry define this event. In this case, the overcurrent
protection will be fitted to inrush current, as shown in
Figure
OC[1:0] bits select overcurrent slope speed and OCHI1
current step can be removed in case of OCHI bit is set to [1].
OCLO2 current level by default. Three other DC overcurrent
30
10XS3412
FUNCTIONAL DEVICE OPERATION
PROTECTION AND DIAGNOSTIC FEATURES
The 10XS3412 incorporates overtemperature detection
Two cases need to be considered when the output
• If the output command is ON: the corresponding output
• If the output command is OFF: FS will go to logic [0] till
For both cases, the fault register OT[0:3] bit into the status
The 10XS3412 incorporates output shutdown in order to
In the first turn-on, the lamp filament is cold and the current
In steady state, the wire harness will be protected by
hson signal
PWM
fault_control
hson
Over-current thresholds
is latched OFF. FS will be also latched to logic [0]. To
delatch the fault and be able to turn ON again the
outputs, the failure condition must disappear and the
autoretry circuitry must be active or the corresponding
output must be commanded OFF and then ON (toggling
fault_control signal of corresponding output) or
V
the corresponding output temperature will be below
T
SUPPLY(POR)
SD
5. This overcurrent protection is programmable:
.
condition if V
SD
:
DD
= 0.
PROTECTION AND DIAGNOSTIC FEATURES
Figure
13,
levels are available: OCLO1 or OCLO3 or OCLO4 based on
the state of the OCLO[1,0] bits.
detection level, the corresponding output will latch the output
OFF and FS will be also latched to logic [0]. To delatch the
fault and be able to turn ON again the corresponding output,
the failure condition must disappear and the autoretry
circuitry must be active or the corresponding output must be
commanded OFF and then ON (toggling fault_control signal
of corresponding output) or V
V
operation.
10XS3412 incorporates also a cooling bulb filament
management if OC_mode and Xenon are set to logic [1]. In
this case, the 1
depend to the previous OFF duration, as illustrated in
Figure
be used in function to the duration of previous OFF state
(toff). The slope of cooling bulb emulator is configurable with
OCOFFCB[1:0] bits.
Severe Short-circuit Fault
protect each output in case of severe short-circuit during of
the output switching.
will latch the output OFF, FS will go to logic [0] and the fault
register SC[0:3] bit will be set to [1]. To delatch the fault and
be able to turn ON again the outputs, the failure condition
must disappear and the corresponding output must be
commanded OFF and then ON (toggling fault_control signal
of corresponding output) or V
V
operation.
DD
DD
If the load current level ever reaches the overcurrent
The SPI fault report (OC[0:3] bits) is removed after a read
In Normal mode using internal PWM module, the
The 10XS3412 provides output shutdown in order to
If the short-circuit impedance is below
The SPI fault report (SC[0:3] bits) is removed after a read
hson
PWM
hson signal
fault_control
= 0.
Over-current thresholds
= 0.
6. The following figure illustrates the current level will
st
step of multi-step overcurrent protection will
Analog Integrated Circuit Device Data
Cooling
toff
SUPPLY(POR)
SUPPLY(POR)
Depending on toff
depending to toff
Freescale Semiconductor
R
condition if
condition if
SHORT
,
the device