Getting to Know the Hardware
KT22XS4200UG Rev. 1.0
Freescale Semiconductor, Inc.
5
3
Getting to Know the Hardware
3.1
Board Overview
The KIT22XS4200EKEVB demonstrates the capability of the MC22XS4200 as a 24 V dual high-side switch that provides integrated
control with protective and diagnostic functions.
This product has been designed for truck, bus, and industrial applications. The low R
DS(on)
channels (< 22 m
Ω
) control different load types;
bulb lamps, solenoids, or DC motors. Control, device configuration, and diagnostics are performed through a 16-bit SPI interface, allowing
easy integration into existing applications.
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 EMC 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. Switching current of each channel can be sensed via 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.
3.2
Board Features
The board features are as follows:
• Input voltage operation range from 6.0 to 58 V
• Dual high-side switch
• Programming, control, and diagnostics accomplished via the use of a 16-bit SPI interface
• Output with selectable slew-rate satisfy electromagnetic compatibility (EMC) requirements
• Each output can be controlled with direct inputs or internal PWM modulated clock signal
3.3
Device Features
This evaluation board features the following Freescale product:
Table 1. Device Features
Device
Description
Features
MC22XS4200
The 22XS4200 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.
• Two fully-protected 22 m
Ω
(at 25 °C) high-side switches
• Up to 3.0 A steady-state current per channel
• Separate bulb and DC motor latched overcurrent handling
• Individually programmable internal/external PWM clock signals
• Overcurrent, short-circuit, and overtemperature protection with programmable autoretry
functions
• Accurate temperature and current sensing
