ZXBM2004 Ver la hoja de datos (PDF) - Diodes Incorporated.

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ZXBM2004

TWO PHASE VARIABLE SPEED MOTOR CONTROL PRE-DRIVER

Diodes Incorporated. 

ZXBM2004

TWO PHASE VARIABLE SPEED

MOTOR CONTROL PRE-DRIVER

Description

Pin Assignments

The ZXBM2004 is a 2-phase, Brushless Direct Current (BLDC)

motor control pre-driver with variable PWM speed control

suitable for fan and blower motors.

For system flexibility, motor speed can be controlled by

changing SPD pin voltage which can be either from Thermistor

network, external voltage or PWM signal.

To help protect the motor coil, the ZXBM2004 provides Rotor

Lock Protection which shuts down the output drive if rotor lock

is detected. The device automatically re-starts when the rotor

lock is removed.

A Tachometer output is provided by open-drain Frequency

Generator (FG) Pin which allows external interface to monitor

motor rotation or speed. The FG output is the magnetic

change frequency.

H+ 1

H-

N/C

ThRef

SPD

CPWM

SMIN

GND

( Top View )

ZXBM 2004

QSOP-16

(Top View )

VCC

V+OP

Ph1

Ph2

N/C

FG

RD

CLCK

The ZXBM2004 is available in small space saving low profile

NC

Ph1

U-QFN3030-16 and QSOP-16 packages.

ThRef

Ph2

SPD

NC

CPWM

FG

Features

• Supports two-phase BLDC motor control

• Operating voltage: 4.7V to 18V

o Can be extended with external regulator

• PWM speed control via external Thermister, DC voltage or

PWM signals

• Reference voltage output

• Built-in Hall amplifier allows direct connection of Hall

element

• Rotor Lock Protection (Lock detection, output shutdown

and automatic re-start)

• Rotor lock detect (RD) output

• Minimum speed setting

• Frequency generator (FG) output for speed measurements

• Low noise

• Space saving low profile U-QFN3030-16 and QSOP-16

packages

• “Green” Molding Compound

U-QFN 3030 -16

Applications

• Desktop PC and Servers fans and blowers

• Instrumentation fans

• Central heating blowers

• Automotive instrument cooling and climate control

• Extractor fans

• General motors and pumps

ZXBM2004

Document number: DS33433 Rev. 5 - 2

1 of 19

www.diodes.com

February 2012

© Diodes Incorporated

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