Document Number: MC12XS6D4
Rev. 6.0, 1/2021
NXP Semiconductors
Data sheet: Technical Data
Dual 8.0 mOhm and dual 21 mOhm
high-side switch
MC08XS6421BEK; MC08XS6421CEK;
MC08XS6421DEK
The 12XS6 is the latest SMARTMOS achievement in automotive lighting drivers.
It belongs to an expanding family that helps to control and diagnose incandescent
lamps and light-emitting diodes (LEDs) with enhanced precision. It combines
flexibility through daisy chainable SPI 5.0 MHz, extended digital and analog
feedback, safety, and robustness.
QUAD HIGH-SIDE SWITCH
Output edge shaping helps to improve electromagnetic performance. To avoid
shutting off the device upon inrush current, while still being able to closely track
the load current, a dynamic overcurrent threshold profile is featured. Current of
each channel can be sensed with a programmable sensing ratio. Whenever
communication with the external microcontroller is lost, the device enters a fail
operation mode, but remains operational, controllable, and protected.
BEK and DEK SUFFIX
(PB-FREE)
98ASA00368D
32-PIN SOICW-EP
CEK SUFFIX
(PB-FREE)
98ASA00894D
32-PIN SOICW-EP
This new generation of high-side switch products family 12XS6 facilitates ECU
design due to compatible MCU software and PCB foot prints for each device
variant.
Features
Applications
• Dual 8.0 mΩ and dual 21 mΩ high-side switches with high transient current
capability
• 16-bit 5.0 MHz SPI control of overcurrent profiles, channel control including
PWM duty-cycles, output On and Off openload detections, thermal shut-down
and prewarning, and fault reporting
• Low-voltage automotive lighting
• Halogen lamps
• Incandescent bulbs
• Light-emitting diodes (LEDs)
• HID Xenon ballasts
• Output current monitoring with programmable synchronization signal and
battery voltage feedback
• Limp home mode
• External smart power switch control
• Operating voltage is 7.08 V to 18 V with sleep current < 5.0 µA, extended
mode from 6.08 V to 28 V
• -16 V reverse polarity and ground disconnect protections
• Compatible PCB foot print and SPI software driver among the family
VBAT
VBAT
VCC
5.0 V
Regulator
VBAT
08XS6421
VBAT
CP
VCC
SI
VCC
SO
CSB
SCLK
SI
GND
CSB
SCLK
SO
RSTB
CLK
CSNS
SYNCB
LIMP
IN1
OUT1
OUT2
OUT3
OUT4
RSTB
CLK
A/D1
Main
MCU
TRG1
PORT
PORT
PORT
PORT
PORT
A/D2
IN2
IN3
IN4
OUT
Smart Power
CSNS
VBAT
IN
OUT6
GND
GND
GND
Figure 1. Dual 8.0 mΩ and dual 21 mΩ simplified application diagram
© NXP B.V. 2021.