Freescale Semiconductor, Inc.
ANALOG
PRODUCTS
PC33991
FACT SHEET
Freescale Semiconductor, Inc...
PC33991 GAUGE DRIVER INTEGRATED CIRCUIT
This GDIC is a Serial Peripheral Interface (SPI) controlled, dual stepper motor driver IC. This
monolithic IC consists of four dual output H-Bridge coil drivers and their associated control
and management logic. Each pair of H-Bridge drivers automatically controls the speed, direc-
tion and magnitude of current through the two coils of a 2-phase instrumentation stepper
motor, similar to an MMT-licensed AFIC 6405.
A special patent-pending circuit detects motor stall accurately and allows simple end stop
detection.
The GDIC is ideal for use in instrumentation systems which require distributed and flexible
stepper motor gauge driving. The device simplifies the use of stepper motors by including all
the logic required to manage the
motion of the stepper without
Simplified Application Diagram
requiring significant processor
VPWR
overhead. SPI communications are
PC33991
used to request a motor position
VPWR SIN1+
and the IC completely manages the
SIN1-
5.0 V
Motor 1
VDD
acceleration, stepping and deceler-
COS1+
Regulator
COS1-
ation of the motor to arrive correct-
RTZ
ly at the requested position.
SIN2+
RSTB
SIN2-
Updated requests can be received
CSB
Motor 2
MCU
SCLK COS2+
at any time and the logic correctly
SI
COS2-
acts upon the latest position
GND
SO
request. Both motors can be
controlled and driven independently.
APPLICATIONS
鈥?Driving Low Power
2 Phase Bipolar
Stepper Motors
鈥?Automotive Gauge
Clusters
鈥?Mirror Positioning
鈥?Headlight Leveling
鈥?Tachograph
鈥?Drivers for Multimedia
Applications
鈥?Digital Clocks
CUSTOMER BENEFITS
鈥?Simple system design with direct interfacing to a
microprocessor
鈥?Low system cost, minimal component count, and
simple circuit hook-up
鈥?Full management of movement of two motors
鈥?Low V
DD
current consumption
鈥?Analog microstepping for low EMI
鈥?Fully protected against faulted motors
SPECIAL FUNCTION
Performance
Typical Values
Motor Drivers
2
Drive Current
鹵 30 mA
Operating Voltage
9.0 鈥?26 V nominal
Control/Communication
SPI
Operating Temp
-40擄C 鈮?T
A
鈮?125擄C
For More Information On This Product,
Go to: www.freescale.com
ACCESSORY CONTROL
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