AN1607 Datasheet, PDF (1/12 Pages) Motorola, Inc – ITC122 low voltage micro to motor interface

MOTOROLA
SEMICONDUCTOR APPLICATION NOTE
Order this document
by AN1607/D
AN1607
ITC122 Low Voltage Micro to Motor Interface
By Bill Lucas and Warren Schultz
A MOSFET power stage that is designed to run Brush or
Brushless DC motors with input signals from an ASB124
Motion Control Development Board is presented here. It will
supply up to 4 amps continuous current from DC bus voltages
up to 48 volts.
Figure 1. ITC122 — Low Voltage Micro to Motor Interface
EVALUATION BOARD DESCRIPTION
A summary of the information required to use ITC122 Low
Voltage Micro to Motor Interface boards is presented as
follows. A discussion of the design appears under the heading
Design Considerations.
Function
The evaluation board shown in Figure 1 is designed to
provide a direct interface between microcomputers and
fractional horsepower motors. It accepts 6 logic inputs which
control 3 complementary Half–Bridge outputs, and is
arranged such that a logic ZERO at the input turns on the
corresponding power transistor. This type of configuration is
applicable to pulse width modulated (PWM) systems where
the PWM signal is generated in a microcomputer, digital signal
processor, or other digital system. It is suitable for driving
fractional horsepower Brush and Brushless DC motors. In
addition to controlling the motor, current sense, temperature
sense, and bus voltage feedback are provided. This board is
designed to interface directly with Motorola ASB124 motor
control development boards.
REV 1
©^MM^Ooto^Tr^Oola^R, I^Onc^L. ^A1998
1