Document Number: MC20XS4200
Rev. 2.0, 6/2012
Freescale Semiconductor
Advance Information
Dual 24 V, 20 mOhm High Side
Switch
20XS4200
The 20XS4200 device is part of a 24 V dual high side switch product
family with integrated control, and a high number of protective and
diagnostic functions. It has been designed for truck, bus, and industrial
applications. The low RDS(ON) channels (<20 mΩ) can control different
load types; bulbs, solenoids, or DC motors. Control, device
configuration, and diagnostics are performed through a 16-bit serial
peripheral interface (SPI), allowing easy integration into existing
applications.
HIGH SIDE SWITCH
Both channels can be controlled individually by external/internal
clock signals, or by direct inputs. Using the internal clock allows fully
autonomous device operation. Programmable output voltage slew-
rates (individually programmable) helps improve electromagnetic
compatability (EMC) performance. To avoid shutting off the device
upon inrush current, while still being able to closely track the load
current, a dynamic over-current threshold profile is featured. Switching
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-safe operation mode, but remains
operational, controllable, and protected.
FK SUFFIX (PB-FREE)
98ASA00428D
23 PIN PQFN (12 X12 mm)
Features
ORDERING INFORMATION
Temperature
• Two fully-protected 20 mΩ (@ 25 °C) high side switches
• Up to 3.0 A steady-state current per channel
• Separate bulb and DC motor latched over-current handling
• Individually programmable internal/external PWM clock signals
• Over-current, short-circuit, and over-temperature protection with
programmable autoretry functions
Device
Package
Range (T )
A
MC20XS4200FK
-40 to 125 °C
23 PQFN
• Accurate temperature and current sensing
• Open-load detection (channel in OFF and ON state), also for LED
applications (7.0 mA typ.)
• Normal operating range: 8.0 - 36 V, extended range: 6.0 - 58 V
• 3.3 V and 5.0 V compatible 16-bit SPI port for device control, configuration and diagnostics at rates up to 8.0 MHz
VDD
VPWR
20XS4200
VDD
VDD
CLOCK
FSB
VPWR
I/O
I/O
SCLK
CSB
SI
SCLK
CSB
SO
RSTB
SI
IN0
HS0
HS1
LOAD
LOAD
MCU
I/O
SO
I/O
M
I/O
IN1
CONF0
CONF1
FSOB
SYNC
CSNS
I/O
A/D
A/D
GND
GND
Figure 1. Simplified Application Diagram
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2012. All rights reserved.
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