AXBM2001 Datasheet

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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

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