Body Electronics
Static Load Control
Overview
Static load control is the function of fully or
partially powering-up the elements of a
substantially non-moving load.
Typical applications include security and
alarm systems, automated irrigation and
plumbing valves, arcade/casino gaming
systems, lighting displays, charging
systems, programmable HVAC controls,
appliances, and “smart house” systems. In
addition, any application where solenoids,
heater elements, relays, bells, horns, sirens,
LEDs, lamps, or lasers are found.
STATIC LOAD CONTROL BLOCK DIAGRAM
33290
33388
33390
33399
33661
33790
33897
33990
Processor
Power
Supply
Parallel I / O
Inter-Module
Communication
Physical Layer
Transceivers
System Input
Sensors and
Contact Monitors
33287
33793
33794
33884
33972
33975
33993
33389
33689
33742
33889
33989
33997
33998
34701
34702
34921
33143
33198
33285
33286
33288A
33289
33291/L
33298
33385
33397
33880
33882
33888
33982
33984
34921
Power
Power IC
Parallel I / O
Power IC
MCU
or
DSP
or
ASSP
Controller
SPI I / O
Power IC
SPI I / O
Power IC
Feedback
Sensors and
A /D Conversion
33287
33793
33884
33972
33975
33993
Key Benefits
> Provides integrated static
load, motor, and motion
control solutions
> Interfaces easily with most
MCU and DSP products
> SMARTMOS™ technology
enables protection and
performance functions to be
monolithically built within the
power IC silicon
Freescale Ordering InformationNote
Part Number
Product Highlights
Additional Information
MC33143
Smart Dual High-Side Switch
www.freescale.com/analog
MC33198
High-Side, N-Channel MOSFET Gate Driver
MC33285
Dual High-Side TMOS Driver
MC33286
Dual High-Side TMOS Driver
MC33287
Contact Monitoring and Dual Low-Side Protected Switch
MC33288A
Solid State Relay for High-Current Incandescent Lamps
MC33289
Dual High-Side Switch for Inductive Loads, 2 x 40 mΩ
MC33290
Serial ISO-9141 K-Line Interface
MC33291/L
Smart Eight Output Switch with SPI Interface (1.6 Ω RDS(ON))
MC33298
Smart Eight Output Switch with SPI I/O Control (0.8 Ω RDS(ON))
MC33385
Quad Low-Side Switch (250 mΩ RDS(ON))
MC33388
Fault Tolerant CAN Interface
MC33389
System Basis Chip with Low-Speed CAN
MC33390
Serial Link ISO-9141 Bus Transceiver
MC33397
Smart Dual/Hex Output Switch with SPI and Parallel Input Control (0.9 Ω RDS(ON))
MC33399
Local Interconnect Network (LIN) Physical Layer
MC33661
eLIN–Enhanced LIN Physical Layer (Local Interconnect Network)
MC33689
System Basis Chip with Enhanced LIN Physical Interface
MC33742
System Basis Chip with Enhanced High-Speed CAN
MC33790
2-Channel DSI Physical Interface for Bus Masters
MC33793
DSI Slave for Remote Sensing
MC33794
Electric Field Imaging Device
MC33880
Configurable Eight Output SPI Controlled Switch (1.0 Ω RDS(ON))
MC33882
Six Output Switch (0.3 Ω RDS(ON)) with SPI and Parallel Input Control
MC33884
Switch Monitor Interface
MC33888
Quad High-Side Switch and Octal Low-Side Switch
MC33889
System Basis Chip with Low-Speed Fault Tolerant CAN
MC33897
Single-Wire CAN Transceiver
MC33972
22 Input Multiple Switch Detection Interface with Suppressed Wake-Up
MC33975
22 Input Multiple Switch Detection Interface with Higher Wetting Current
MC33982
Self-Protected 2 mΩ Switch and Diagnostic and Protection
MC33984
Self-Protected 4 mΩ Switch and Diagnostic and Protection
MC33989
System Basis Chip with High-Speed CAN
MC33990
Serial Link J-1850 Bus Transceiver
MC33993
22 Input Multiple Switch Detection Interface
MC33997
3.3/5.0 V Switching Power Supply
MC33998
2.6/5.0 V Switching Power Supply
MC34701
Dual Output Power Supply Switching (1.5 A)
MC34702
Dual Output Power Supply Switching (3.0 A)
MC34921
Power Supply Control IC
Note: Search on the listed part number.
SG2003-2
Design Challenges
There are three categories which classify
static load control electronics: inductive
loads, incandescent loads, and resistive
loads. Resistive loads are easy; the
design engineer merely needs to
account for the current and voltage
required to drive the resistive element.
Inductive loads, on the other hand,
represent a design challenge in that they
can produce destructive “back EMF”
voltage transients, draw huge spikes of
current when their magnetic field goes
into saturation, and may generate both
conducted and radiated EMI and RFI if
driven without careful control of di/dt.
Incandescent loads represent an
altogether different challenge, in that
their resistance can change an order of
magnitude from the “filament cold” stage
to the “filament hot” stage. This can
cause huge inrush currents to be drawn
for several milliseconds when power is
first applied to the incandescent load.
Freescale Semiconductor Solution
Freescale Semiconductor analog/mixed
signal and power integrated circuits are
designed to provide system solutions for
static load control, motor control, and
motion control when coupled with MCUs
or DSPs. In addition to being designed
for easy interface and communication
with most MCU and DSPs, Freescale
Semiconductor's SMARTMOS™
technology also enables the key
protection and performance functions to
be built monolithically within the silicon of
the power IC. Instead of a printed circuit
board loaded with discrete components
(and a concomitant poor MTBF number),
a system solution can be achieved with
Freescale Semiconductor products
which are highly integrated, robust, and
reliable.
Typical Applications:
> Security systems
> Programmable thermostats
> Large building automation
> Automotive safety systems
> Water heaters
> Score boards
> Gaming machines (casino/arcade)
> White goods appliances
Loop Control Schema:
> Current
> Voltage
> Sensor feedback
> Limit switch ("bang-bang")
> None (open loop)
Power Control Schema:
> On/off
> PWM
> PFM
> Linear
> Phase angle
> Charging systems
Static Load Types:
> Incandescent lamps
> Irrigation controls
> Heating elements
> Industrial controls
> LEDs/lasers
> Automotive body electronics
> Ultrasonic transducers
> HVAC
> Piezo transducers
> Lighting displays
> Induction coils
> Sirens/horns/bells
SG2003-3
Development ToolsNote
Tool Type
Product Name
Vendor
Description
Additional Information
Evaluation Kit
KIT33289DWEVB
Metrowerks
Automotive Dual High-Side Switch
www.metrowerks.com
Evaluation Kit
KIT33291DWEVB
Metrowerks
Eight Output Switch with SPI Interface
Evaluation Kit
KIT33298DWEVB
Metrowerks
Eight Output Switch with SPI Interface
Evaluation Kit
KIT33388DEVB
Metrowerks
Fault Tolerant CAN Interface
Evaluation Kit
KIT33389DWEVB
Metrowerks
System Basis Chip
Evaluation Kit
KIT33397DWEVB
Metrowerks
Configurable Smart Output Switch (0.7 Ω RDS(ON))
Evaluation Kit
KIT33399DEVB
Metrowerks
Local Interconnect Network (LIN) Physical Layer
Evaluation Kit
KIT33661DEVB
Metrowerks
LIN Enhanced Physical Interface
Evaluation Kit
KIT33689DWBEVB
Metrowerks
System Basis Chip with LIN Transceiver
Evaluation Kit
KIT33742DWEVB
Metrowerks
System Basis Chip with Enhanced High-Speed CAN
Evaluation Kit
KIT33793DEVB
Metrowerks
DSI Slave for Remote Sensing
Evaluation Kit
KIT33880DWBEVB
Metrowerks
Configurable Eight Output Switch with SPI
Evaluation Kit
KIT33889DWEVB
Metrowerks
System Basis Chip with Low-Speed CAN
Evaluation Kit
KIT33982PNBEVB
Metrowerks
Protected High-Current High-Side Switch
Evaluation Kit
KIT33984PNBEVB
Metrowerks
Dual 4 mΩ Intelligent High-Current Self-Protected Silicon High-Side
Switch
Evaluation Kit
KIT33989DWEVB
Metrowerks
System Basis Chip with High-Speed CAN
Evaluation Kit
KIT33993DWBEVB
Metrowerks
22 Input Multiple Switch Detection Interface
Evaluation Kit
KIT33997DWEVB
Metrowerks
3.3/5.0 Switching Power Supply
Evaluation Kit
KIT33998DWEVB
Metrowerks
2.6/5.0 Switching Power Supply
Note: Search on the listed product name.
Related DocumentationNote
Document Number
Description
Additional Information
APDPAK
Analog ICs Integrated Solutions Pitch Pak
www.freescale.com
SG187
Automotive Selector Guide
SG1002
Analog Selector Guide
Note: Search on the listed document number.
Learn More: Contact the Technical Information Center at +1-800-521-6274 or +1-480-768-2130.
For more information about Freescale products, please visit www.freescale.com.
Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc.
All other product or service names are the property of their respective owners.
© Freescale Semiconductor, Inc. 2005. All rights reserved.
SG2003
REV 3
6/2005
June2005