Applications Note AN36
Issue 1 - JULY 2002
ZXBM200x SERIES OF VARIABLE SPEED 2-PHASE
FAN MOTOR CONTROLLER
PURPOSE
This Applications document is intended to aid
users in their development of the controller
electronics for fan and blower motors using
the ZXBM200x series of variable speed,
2-phase, DC brushless motor controllers.
The document will not discuss mechanical
details of motor design including such
aspects as the position of commutation in
relationship to windings etc, for which it is
assumed the user already has prior
knowledge.
ZXBM200x DESCRIPTION
The ZXBM200x is a series of 2-phase, DC
brushless motor pre-drivers with variable
speed control suitable for fan and blower
motors. A full description is to be found in the
device Datasheet available by logging on to
www.zetex.com/zxbm.
There are three variants available for the
controller and all are identical in every aspect
except the Lock and FG output functions on
Pin 6. The output on the ZXBM2003 is
rotational frequency FG, on the ZXBM2002
the pin indicates when the controller in the
Lock state whilst in the ZXBM2001 the output
is a combination of both the Lock and FG
signals.
For the purpose of aiding clarity in this
document the device Block Diagram and
Pinout Diagram.
Block Diagram
Pinout Diagram
The Pinning is shown for the ZXBM2001 as this is the variant
discussed and illustrated in this document. Applications for
the ZXBM2002 and ZXBM2003 will be identical with the only
difference being the function of Pin 6 as discussed above.
AN 36 - 1
ZETEX [ ZETEX SEMICONDUCTORS ]
