ZXBM1004Q16TC datasheet(7/12 Pages) DIODES

Part #	ZXBM1004Q16TC

Description	VARIABLE SPEED SINGLE-PHASE BLDC MOTOR CONTROLLER

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Manufacturer	DIODES [Diodes Incorporated]

Direct Link	http://www.diodes.com

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VCC - Applied Voltage

This is the device internal circuitry supply voltage. For

5V to 12V fans this can be supplied directly from the Fan

Motor supply. For fans likely to run in excess of the 18V

maximum rating for the device this will be supplied

from an external regulator such as a Zener diode.

RD Timing Waveform:

Applications Information

The ZXBM1004 is primarily controlled by a voltage on

the SPD pin. A voltage of 1V represents a 100% PWM at

the Phase Outputs and in turn represents full speed. 3V

on the SPD pin conversely represents 0% PWM. The

motor can therefore be controlled simply by applying a

control voltage onto the SPD pin with the minimal use

of external components.

This voltage control method easily lends itself to

control by other signal types. For example if a

thermistor is applied to the SPD pin a varying voltage

can be generated at the SPD pin as the resistance of the

thermistor varies with temperature.

A common form of control of fans is by a PWM signal

derived from a central processor or controller. This

signal can be converted into a voltage and that voltage

adjusted as neccesary to compensate for motor none

linearity, inclusion of the Minimum speed feature etc.

Full applications details and further examples of how to

control the ZXBM1004 are available in the Applications

Notes AN41, AN42 and AN43.

ZXBM1004

SEMICO NDUC TORS

ISSUE 6 - MAY 2007

7

TLock

TOff

TOn

Hall

CLCK

FG

RD

VTHH

VTHL

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ZXBM1004Q16TC Datasheet(PDF) 7 Page - Diodes Incorporated

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