MC10XS3412DHFK Freescale Semiconductor, MC10XS3412DHFK Datasheet - Page 31

• 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

Overvoltage Fault (Enabled by default)
10XS3412 shuts down all outputs and FS will go to logic [0]
during an overvoltage fault condition on the VPWR pin (V
> V
overvoltage condition is removed (V
V
is set to logic [1] and cleared after either a valid SPI read.
(OV_dis bit is disabled set to logic [1]). The fault register
reflects any overvoltage condition (V
overvoltage diagnosis, as a warning, is removed after a read
operation, if the fault condition disappears. The HS[0:3]
outputs are not commanded in R
threshold.
the RST logic state: enable for RST = 1 and disable for
RST = 0. The device is still protected with overtemperature
protection in case the overvoltage feature is disabled.
Undervoltage Fault
VPWR
specified range, the internal logic states within the device will
remain (configuration and reporting).
undervoltage threshold (V
Analog Integrated Circuit Device Data
Freescale Semiconductor
(Open-load OFF=1
or OV=1)
or ShortVpwr=1
PWR(OVHYS)
By default, the overvoltage protection is enabled. The
The overvoltage protection can be disabled through SPI
In Fail-safe mode, the overvoltage activation depends on
The output(s) will latch off at some battery voltage below
In the case where battery voltage drops below the
PWR(OV)
(UV)
. As long as the V
if hson=0
). The outputs remain in the OFF state until the
OFF
). When experiencing this fault, the OVF fault bit
PWR
DD
(fault_control=1 and OV=0)
(fault_control=0 or OV=1)
< V
level stays within the normal
DS(ON)
PWR(UV)
PWR
PWR
(fault_control=0)
above the OV
< V
> V
), the outputs will
PWR(OV)
PWR(OV)
Figure 12. Autoretry State Machine
(Open-load OFF=1
or OV=1)
or ShortVpwr=1
). This
-
PWR
if hson=1
Auto-retry
(fault_control=0)
(fault_control=0)
ON
OFF
(Open-load ON=1)
(Retry=1)
turn off, FS will go to logic [0], and the fault register UV bit will
be set to [1].
recovers (VPWR > VPWR(UV)_UP):
overtemperature shutdown circuitry. All previous latched
faults, occurred when VPWR was within the normal voltage
range, are guaranteed if VDD is within the operational voltage
range or until V
detected (VDD failure included) and reported through SPI
above VPWR
the VPWR voltage does not drop any lower than 3.5 V typical.
short-circuit, over and undervoltage) are reset if:
Two cases need to be considered when the battery level
• If outputs command are low, FS will go to logic [1] but
• If the output command is ON, FS will remain at logic [0].
In extended mode, the output is protected by
All latched faults (overtemperature, overcurrent, severe
• V
• V
the UV bit will remain set to 1 until the next read
operation (warning report).
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
value.
SUPPLY(POR)
DD
DD
(after Retry Period and OV=0)
=> count=count+1
and V
< V
(UV)
(Retry=1)
DD(FAIL)
(SC=1)
(count=16)
SUPPLY(POR)
(OV=1)
PWR
. The output state is not changed as long as
PROTECTION AND DIAGNOSTIC FEATURES
condition if V
supplies is below V
with V
FUNCTIONAL DEVICE OPERATION
PWR
if VDD = 0. Any new OT fault is
DD
in nominal voltage range,
= 0.
Latched
Auto-retry
if hson=1
OFF
SUPPLY(POR)
(SC=1)
ON
(open-loadOFF=1
or OV=1)
or ShortVpwr=1
(Open-load ON=1)
10XS3412
voltage
31