MC10XS3412DHFK Freescale Semiconductor, MC10XS3412DHFK Datasheet - Page 32

• 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

AUTORETRY
automatically in case of overcurrent or overtemperature or
undervoltage failure conditions to provide a high availability
of the load.
in case of internal retry signal is set to logic [1]:
autoretry period (t
occurrence (16 for each output). The counter of retry
occurrences is reset in cases of mode transitions (refer to
NORMAL & Fail Safe MODE
bit toggling. At each autoretry, the overcurrent detection will
be set to default values in order to sustain the inrush current.
DIAGNOSTIC
Output Shorted to VPWR Fault
detection circuitry in OFF state. Output shorted to VPWR fault
is detected if output voltage is higher than
reported as a fault condition when the output is disabled
(OFF). The output shorted to VPWR fault is latched into the
status register after the internal gate voltage is pulled low
enough to turn OFF the output. The OS[0:3] and
OL_OFF[0:3] fault bits are set in the status register and FS
pin reports in real time the fault. If the output shorted to
VPWR fault is removed, the status register will be cleared
after reading the register.
disabled through SPI (OS_DIS[0:3] bit).
Open-Load Faults
detection circuitries on the output to detect in OFF and in ON
state.
Open-load Detection In Off State
output voltage is higher than
internal current source (
condition when the output is disabled (OFF). The OFF Output
open-load fault is latched into the status register or when the
internal gate voltage is pulled low enough to turn OFF the
output. The OL_OFF[0:3] fault bit is set in the status register.
If the open load fault is removed (FS output pin goes to high),
the status register will be cleared after reading the register.
through SPI (OLOFF_DIS[0:3] bit).
Open-load Detection In On State
chosen by SPI to detect a standard bulbs or LEDs
32
10XS3412
FUNCTIONAL DEVICE OPERATION
PROTECTION AND DIAGNOSTIC FEATURES
The autoretry circuitry is used to reactivate the output(s)
Autoretry feature is available in Fault mode. It is activated
retry[x] = OC[x] or OT[x] or UV.
The feature retries to switch-on the output(s) after one
The
The 10XS3412 incorporates output shorted to VPWR
The open output shorted to VPWR protection can be
The 10XS3412 incorporates three dedicated open-load
The OFF output open-load fault is detected when the
The OFF output open-load protection can be disabled
The ON output open-load current thresholds can be
Figure 12
describes the autoretry state machine.
AUTO
) with a limitation in term of number of
I
OLD(OFF)
V
TRANSITIONS) and Retry_dis
OLD(THRES)
) and reported as a fault
pulled up with
V
OSD(THRES)
and
(OLLED[0:3] bit set to logic [1]). In the cases where load
current drops below the defined current threshold, the OLON
bit is set to logic [1], and the output stays ON and FS will not
be disturbed.
Open-load Detection In On State For Led
detected periodically each t
detect OLLED in the fully-on state, the output must be ON at
least t
and SPI read operation is needed (OL_ON[0:3] bit). The ON
output open-load protection can be disabled through SPI
(OLON_DIS[0:3] bit).
Analog Current Recopy and Temperature Feedbacks
proportional to the designed output current or a voltage
proportional to the temperature of the GND flag (pin #14).
The routing is SPI programmable (TEMP_en, CSNS_en,
CSNS_s[1,0] and CSNS_ratio_s bits).
delivers current only during ON time of the output switch
without overshoot. The maximum current is 2.0 mA typical.
The typical value of external CSNS resistor connected to the
ground is 4.7 k
Temperature Prewarning Detection
prewarning reported via SPI in case of the temperature of the
GND flag is higher than T
to [1]) is latched in the SPI DIAGR0 register. To delatch, a
read SPI command is needed.
ACTIVE CLAMP ON VPWR
to limit the maximum transient VPWR voltage at
VPWR
corresponding output is turned off, which leads to a high-
voltage at VPWR with an inductive VPWR line. When VPWR
voltage exceeds VPWR
corresponding output is deactivated and all HS[0:3] outputs
are switched ON automatically to demagnetize the inductive
Battery line.
(> 20 meters), the smart high side switch output may exceed
the energy capability in case of a short-circuit. It is
recommended to implement a voltage transient suppressor
to drain the battery line energy.
REVERSE BATTERY ON VPWR
low as -18 V. Under these conditions, the ON resistance of
the output is 2 times higher than typical ohmic value in
Open load for LEDs only (OLLED[0:3] set to logic [1]) is
To delatch the diagnosis, the condition should be removed
The CSNS pin is an analog output reporting a current
In case the current recopy is active, the CSNS output
The current recopy is not active in Fail-safe mode.
In Normal mode, the 10XS3412 provides a temperature
The device provides an active gate clamp circuit in order
For a long battery line between the battery and the device
The output survives the application of reverse voltage as
OLLED.
(CLAMP)
. In case of an overload on an output, the

.
Analog Integrated Circuit Device Data
(CLAMP)
OTWAR
OLLED
. This diagnosis (OTW bit set
threshold, the turn-off on the
(fully-on, D[6:0]=7F)
Freescale Semiconductor
.
To