ZXBM2004 datasheet(6/12 Pages) ZETEX

No de pièce	ZXBM2004

Description	VARIABLE SPEED 2-PHASE BLDC MOTOR CONTROLLER

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Fabricant	ZETEX [Zetex Semiconductors]

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As these threshold voltages are nominally set to VTHH =

3V and VTHL = 1V the equations can be simplified as

follows:

T

C

I

C

I

PWM

PWMC

PWMD

=+

22

CLCK - Locked rotor timing capacitor

Should the fan stop rotating for any reason, i.e. an

obstruction in the fan blade or a seized bearing, then

the device will enter a Rotor Locked condition. In this

condition after a predetermined time (TLOCK) the RD pin

will go high and the Phase outputs will be disabled.

After a further delay (TOFF) the controller will re-enable

the Phase drive for a defined period (TON) in an attempt

to re-start the fan. This cycle of (TOFF) and (TON) will be

repeated indefinitely or until the fan re-starts.

GND - Ground

This is the device supply ground return pin and will

generally be the most negative supply pin to the fan.

RD - Locked Rotor error output

This pin is the Locked Rotor output as referred to in the

CLCK timing section above. It is high when the rotor is

stopped and low when it is running.

This is an open collector drive giving an active pull

down with the high level being provided by an external

pull up resistor.

FG - Frequency Generator (speed) output

This is the Frequency Generator output and is a

buffered signal from the Hall sensor.

This is an open collector drive giving an active pull

down with the high level being provided by an external

pull up resistor.

Ph1Lo & Ph2Lo - Driver

This pair of outputs drive the external devices. These

outputs provide both the commutation and PWM

waveforms. The outputs are of the Darlington emitter

follower type with an active pull-down to help faster

switch off when using bipolar devices. When in the

high state the outputs will provide up to 80mA of drive

into the base or gates of external transistors as shown

in the Typical Application circuit following.

When in the low state the active Phase drive is capable

of sinking up to 16mA when driving low to aid turn off

times during PWM operation. When the Phase is

inactive the output is held low by an internal pull-down

resistor.

V+OP - Phase Outputs Supply Voltage

This pin is the supply to the Phase outputs and will be

connected differently dependant upon external

transistor type.

For bipolar devices this pin will be connected by a

resistor to the VCC pin. The resistor is used to control

the current into the transistor base so its value is

chosen accordingly.

For MOSFET devices the pin will connect directly to the

VCC pin.

ZXBM2004

SEMICO NDUC TORS

ISSUE 3 - MAY 2005

6

Numéro de pièce similaire - ZXBM2004

Fabricant	No de pièce	Fiches technique	Description
Diodes Incorporated	ZXBM2004	224Kb / 12P	VARIABLE SPEED 2-PHASE BLDC MOTOR CONTROLLER
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Description similaire - ZXBM2004

Fabricant	No de pièce	Fiches technique	Description
Diodes Incorporated	ZXBM2004	224Kb / 12P	VARIABLE SPEED 2-PHASE BLDC MOTOR CONTROLLER
Zetex Semiconductors	ZXBM1015	104Kb / 10P	VARIABLE SPEED SINGLE- PHASE BLDC MOTOR CONTROLLER
	ZXBM1004	265Kb / 12P	VARIABLE SPEED SINGLE-PHASE BLDC MOTOR CONTROLLER
	ZXBM1017	157Kb / 12P	VARIABLE SPEED SINGLE- PHASE BLDC MOTOR CONTROLLER
Diodes Incorporated	ZXBM1017	150Kb / 10P	VARIABLE SPEED SINGLE- PHASE BLDC MOTOR CONTROLLER
Diodes Incorporated	ZXBM1004	340Kb / 12P	VARIABLE SPEED SINGLE-PHASE BLDC MOTOR CONTROLLER
Zetex Semiconductors	ZXBM1017	130Kb / 10P	VARIABLE SPEED SINGLE- PHASE BLDC MOTOR CONTROLLER
Zetex Semiconductors	ZXBM1004	263Kb / 12P	VARIABLE SPEED SINGLE-PHASE BLDC MOTOR CONTROLLER
Diodes Incorporated	ZXBM1015	124Kb / 10P	VARIABLE SPEED SINGLE- PHASE BLDC MOTOR CONTROLLER
Zetex Semiconductors	ZXBM1015	130Kb / 12P	VARIABLE SPEED SINGLE-PHASE BLDC MOTOR CONTROLLER

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