BLDC-motor controller is convenient and configurable
The MC34929 from Freescale
Semiconductor is a three-phase
controller IC for small Brushless DC
(BLDC) motors, which
supports sophisticated
functions as well as
allowing designers
to differentiate
product designs.
The device operates efficiently
with supply voltages from 8V to 28V
and provides continuous motor-drive
current up to 1A.
In addition to implementing the
H-bridges to control each motor-winding
phase, the MC34929 also integrates all the
circuitry required to autonomously control
a BLDC motor, thereby minimising external
components. Features include a Hall-sensor
interface and voltage supply, built-in
stall-detection and protection circuitry, and
logic-level control. These enable autonomous
operation of BLDC motors with a push-button
or switch interface, or under the control of
an external MCU. In addition, a variety of
configuration and communication features are
provided, enabling active monitoring of device
operation for increased reliability.
Engineers can also implement
functions such as adjustable,
autonomous and continuous
modes, to differentiate
products in the
marketplace. Several
operating modes
are supported,
including
clockwise, anticlockwise,
run/stop,
brake, variable speed, and
torque limiting.
FEATURES
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- 4mm x 4mm x 1mm QFN-24 package
- Two tachometer outputs for 1x and 3x Hall frequency
- Adjustable maximum-current limit for torque limiting
- Adjustable stalled-rotor detection and protection
- Short-circuit, over-temperature and under-
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APPLICATIONS
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- Cooling fans
- Extractor systems
- Machine tools
- Industrial fans and pumps
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Development board KIT34929EGEVBE is available to members of the Future Board Club.
To apply for the development board, and membership of the Board Club, go to
www.my-boardclub.com/manf-offers.htm
This offer is free and subject to qualification. |
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