ZXBM2003X10TC [ZETEX]

VARIABLE SPEED 2-PHASE FAN MOTOR CONTROLLER; 变速2相风机电机控制器


型号：	ZXBM2003X10TC
厂家：	ZETEX SEMICONDUCTORS
描述：	VARIABLE SPEED 2-PHASE FAN MOTOR CONTROLLER 变速2相风机电机控制器运动控制电子器件风机信号电路光电二极管电动机控制电机控制器
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中文：	中文翻译
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ZXBM2001

ZXBM2002 ZXBM2003

VARIABLE SPEED 2-PHASE FAN MOTOR CONTROLLER

DESCRIPTION

The ZXBM200x is a series of 2-phase, DC brushless motor pre-drivers with PWM

variable speed control suitable for fan and blower motors.

FEATURES

· Built in lock detect protection, rotational speed sensing and automatic recovery

· Built in Hall amplifier allows direct connection to Hall element

· PWM Speed control can be implemented via external voltage or resistance (thermistor) input

· Speed (FG) pulse output – ZXBM2003

· Rotor lock output – ZXBM2002

· Combined Rotor Lock (RD) and Speed (FG) signal – ZXBM2001

· Up to 18V input voltage (60V with external regulator)

· MSOP10 package

APPLICATIONS

· Mainframe and Personal Computer Fans and Blowers

· Instrumentation Fans

· Central Heating Blowers

· Automotive climate control

ORDERING INFORMATION

DEVICE

REEL SIZE

7” (180mm)

13” (330mm)

TAPE WIDTH

12mm

QUANTITY PER REEL

ZXBM200xX10TA

ZXBM200xX10TC

1,000

4,000

12mm

Example: ZXBM2001X10TA

DEVICE MARKING

ZXBM2001 - BM21

ZXBM2002 - BM22

ZXBM2003 - BM23

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Absolute maximum ratings

Parameter

Supply Voltage

Symbol

Limits

-0.6 to 20

200

Unit

CCmax

Input Current

ЊC

Power Dissipation

Operating Temp.

Storage Temp.

500

-40 to 85

-55 to 125

OPR

STG

ЊC

Electrical Characteristics (at Tamb = 25°C & Vcc = 12V)

Parameter

Supply Voltage

Symbol

Min

Typ

Max

Unit

Conditions

4.5

Supply Current

2.2

3.25

No Load

Hall Amp Input Voltage

Hall Amp Common Mode Voltage

Hall Amp Input Offset

Hall Amp Bias Current

PH1, PH2 Output High

diff p-p

0.5

0.5V

-1.5

OFS

-350

-2.2

-1.8

I = 80mA

PH1, PH2 Output Off Leakage

Current

Ϯ10

␮A

OFF

PH1, PH2 Output Current

Lock/FG Maximum Collector

Voltage

Lock/FG Sink Current

Lock/FG Low Level O/P Voltage

C_LCKCharge Current

0.3

0.5

= 5mA

= 1.5V

-1.8

-2.8

0.28

1:10

2.0

1.0

4.3

␮A

LCKC

LCKD

C_LCKDischarge Current

Lock condition On:Off ratio

C_LCKHigh Threshold Voltage

C_LCKLow Threshold Voltage

C_PWMCharge Current

0.35

1:7

THH

THL

3.6

5.0

␮A

kHz

= 1.5V

PWMC

PWMD

C_PWMDischarge Current

PWM Frequency

PWM

0.15nF

C_PWMHigh Threshold Voltage

C_PWMLow Threshold Voltage

SPD Voltage Control Range

SPD Open Circuit Voltage

2.0

1.0

THH

THL

SPD

1.5

Notes:

Measured with pins H+, H-, C

and C

= 0V and all other signal pins open circuit.

PWM

LCK

The 1V minimum represents 100% PWM drive and 2V represents 0% PWM drive.

This voltage is determined by an internal resistor network of 52.5k⍀ from the pin to Gnd and 19.5k⍀ from the pin to a 2V reference. Whilst both

resistors track each other the absolute values are subject to a Ϯ20% manufacturing tolerance.

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Block Diagram (ZXBM2001):

Pin Assignments

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Pin Functional Descriptions

5. GND - Ground

1. VCC - Applied voltage

This is the device supply ground return pin and will

generally be the most negative supply pin to the fan.

This is the device 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.

6. LOCK/FG

- Locked Rotor error output /

Frequency Generator (speed) output

On the ZXBM2001 the Lock/FG pin is designed to be a

dual function pin to provide an indication of the Fans

rotational speed together with an indication of when

the Fan has failed rotating for whatever reason (Rotor

2. H+

3. H-

- Hall input

The rotor position of the Fan Motor is detected by a Hall Locked condition). The pin is an open collector drive,

sensor whose output is applied to these pins. This that is there is an active pull down with the high level

sensor can be either a 4 pin ‘naked’ Hall device or a 3 being provided by an external pull up resistor. Under

pin buffered switching type. For a 4 pin device the correct operating conditions, and with this external

differential Hall output signal is connected to the H+ pull-up in place, this pin will provide an output signal

and H- pins. For a 3 pin buffered Hall sensor the Hall whose frequency will be twice that of the rotational

device output is attached to the H+ pin whilst the H- pin frequency of the fan. Should the fan itself stop rotating

has an external potential divider attached to hold the for any reason, i.e. an obstruction in the fan blade or a

pin at half V . When H+ is high in relation to H- Ph2 is seized bearing, then the device will enter a Rotor

the active drive.

Locked condition. In this condition the Lock/FG pin will

go high (regardless of the state of the Hall sensor)

when the C

pin reaches the V

threshold and will

LCK

THH

4. SPD

- Speed control voltage input

remain high until the fan blades start rotating again.

This pin provides control over the Fan Motor speed by

varying the Pulse Width Modulated (PWM) drive ratio

at the Ph1 and Ph2 outputs. This control signal can take

the form of either a voltage input of nominal range 2V

to 1V, representing 0% to 100% drive respectively, or

alternatively a thermistor can be attached to this pin to

control the voltage. The pin has an internal potential

divider between Gnd and an internal 2.0V reference

designed to hold the pin at approximately 1.5V. This

will represent a drive of nominally 50%. The addition of

a 100k NTC thermistor to ground, for example, will

provide a drive nominally 70% at 25°C and 100% at

50°C.

On the ZXBM2002 variant this pin is Lock. During

normal operation the signal will be low and during a

Locked Rotor condition the pin will go high when the

pin reaches the V

threshold.

LCK

THH

For the ZXBM2003 variant this pin is FG. This signal is a

buffered and inverted output of the Hall signal and

therefore provides an output signal whose frequency

willbetwicethatoftherotational frequency ofthefan.

7. C

- Locked Rotor timing capacitor

LCK

When in a Locked Rotor condition as described above

the Ph1 and Ph2 drive outputs go into a safe drive mode

to protect the external drive devices and the motor

windings. This condition consists of driving the motor

for a short period then waiting for a longer period

before trying again. The frequency at which this takes

place is determined by the size of the capacitor applied

to this CLCK pin. For a 12V supply a value of 1.0uF will

typically provide an ‘On’ (drive) period of 0.33s and an

‘Off’(wait)periodof4.0s, givinganOn:Off ratioof1:12.

If speed control is not required this pin is can be left

open circuit for 50% drive or tied to ground by a 10k⍀

resistor to provide 100% drive.

If required this pin can also be used as an enable pin.

The application of a voltage of 2.0V to V will to force

the PWM drive fully off, in effect disabling the drive.

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Locked Rotor timing capacitor (CONT).

9. PH2

- External transistor driver

10. PH1 - External transistor driver

The C

timing periods are determined by the

LCK

following equations:

These are the Phase drive outputs and are open

darlington emitter followers designed to provide up to

80mA of drive to external transistors as shown in the

Application circuits following. The external transistors

in turn drive the fan motor windings.

^THH× C^LCK

(V^THH− V^THL)× C^LCK

Tlock

Toff

ILCKC

ILCKD

(V^THH− V^THL)× C^LCK

Ton =

ILCKC

Lock and FG Timing Waveform:

Where V

voltages and I

LCKC

discharge currents.

and V

are the C

pin threshold

THH

THL

and I

LCK

are the charge and

LCKD

As these threshold voltages are nominally set to

=2V and V =1V the equations can be simplified

THH

as follows:

THL

2× C^LCK

LCK

Tlock

Ton

Toff

ILCKC

ILCKD

8. C

- Sets PWM frequency

PWM

This pin has an external capacitor attached to set the

PWM frequency for the Phase drive outputs. A

capacitor value of 0.15nF will provide a PWM

frequency of typically 24kHz.

The C

LCK

following equation:

timing period (T

) is determined by the

pwm

Lock Timing Example:

Using the equation previously described and to be

(V^THH− V^THL)× C^PWM(V^THH− V^THL)× C^PWM

found under the C

pin description:

LCK

Tpwm

IPWMC

IPWMD

2× C^LCK

LCK

Tlock

Ton

Toff

ILCKC

ILCKD

Where V

voltages and I

PWMC

discharge currents.

and V

are the C

pin threshold

THH

THL

and I

PWM

are the charge and

PWMD

Using a value of C

= 1.0uF together with the values

to be found in the Electrical

LCK

of I

and I

LCKC

LCKD

Characteristics we can derive the following timings for

operation at 12V and 25°C.

As these threshold voltages are nominally set to

=2V and V

=1V the equations can be simplified

THH

as follows:

THL

2× 1.0␮F

2.8␮A

1.0␮F

0.28␮A

Tlock

= 0.714s

Toff

= 3.6s

PWM

PWMC

PWM

Tpwm

IPWMD

2× 1.0␮F

2.8␮A

Ton

= 0.36s

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APPLICATION INFORMATION

The ZXBM200x series of 2-phase DC brushless motor Also illustrated in the two Applications circuits above

pre-drivers are capable of driving both Bipolar or are the methods of connection for both a ‘naked’ Hall

MOSFET power transistors.

device, as seen in the bipolar circuit in Figure 1, and a

buffered Hall device, as in the MOSFET circuit in Figure

2. In this latter circuit R5 & R6 bias the H- pin at a voltage

equivalent to half the swing of the Hall device. R7 will

be needed if the buffered Hall device does not have its

own internal pull-up.

For smaller fans and blowers it is likely that bipolar

power transistors would be used as shown in the

following Applications circuit.

In Figure 1, R1 & R2 have their value selected to provide

suitable base current in keeping with the winding

current and gain of the power transistors Q1 & Q2. R3 &

R4 have their value selected to provide efficient

switch-off of Q1 & Q2. The Zener diodes ZD1 & ZD2

provideactiveclamping inconjunction withQ1&Q2.

TYPICAL APPLICATION (ZXBM2001) using

MOSFET power transistors

It is also recommended that the supply de-coupling

capacitor C3 is positioned as close as is practical to the

ZXBM device pins.

TYPICAL APPLICATION (ZXBM2001) using

Bipolar power transistors

Figure 2

Graph 1 below, illustrates the PWM drive waveform

taken from and application using the MOSFET circuit in

Figure 2. This shows the waveforms to be found at the

Ph1 output and at the drain/Winding node.

Figure 1

In the case of higher power fans and blowers it may be

more applicable to use MOSFET devices to switch the

windings as illustrated in the second applications

circuit shown in Figure 2.

In Figure 2, the Resistor ratio of R1 to R3 and R2 to R4

provide the required Gate turn-on voltage whilst the

absolute values will be chosen to provide sufficient

gate switching currents.

Graph 1

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When driving fans with bipolar transistors, at higher

voltages it may be necessary to provide extra noise

protection by the addition of a diode from the driver

collector to Gnd on each phase. This prevents negative

voltage excursions from the windings affecting

operation. See Figure 3 right, showing the placement

of these diodes. It should be noted that these are not

required for the MOSFET solution in Figure 2 as the

diodes are inherent in the MOSFET structure.

TYPICAL APPLICATION (ZXBM2001)

illustrating addition of Clamp diodes.

Zetex provide a variety of suitable power transistors for

using with the ZXBM200x series of 2-phase DC

brushless motor pre-drivers and suitable devices

sufficient for a range of applications are given in the

following table.

Figure 3

SUMMARY TABLE OF SUITABLE DEVICES

Bipolar Types

(V)

(A)

min H

@ I

max

Package

CEO

CE(sat)

(mV)

@ I & I

4.5

300 @ 0.5A

100 @ 2A

300 @ 1A

200@1A,10mA

100@1A,10mA

SOT223

SOT23-6

FZT1053A

FZT851

ZXT13N50DE6

MOSFET Types

(V)

(A)

(mW)

Package

DSS

PEAK

DS(on)

@ V

(Pulsed)

ZXMN3A04DN8^{2 3}

ZXMN6A09DN8^{2 3}

7.6

20 @ 10V

45 @ 10V

SO8

17.6

Notes:

Contact your nearest Zetex office for further details and technical enquiries.

Dual device

Provisional information

Advanced information

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PACKAGE DIMENSIONS

MILLIMETRE

MIN. MAX.

1.10

DIM

0.15

0.75

0.95

3.00 BSC

4.90 BSC

3.00 BSC

0.17

0.27

0.23

0.08

0.50 BSC

⍜

0Њ

15Њ

0.40

0.80

0.95 BSC

Conforms to JEDEC MO-187 VARIATION BA

Zetex plc

Fields New Road

Chadderton

Oldham, OL9 8NP

United Kingdom

Telephone (44) 161 622 4422

Fax: (44) 161 622 4420

Zetex GmbH

Streitfeldstraße 19

D-81673 München

Zetex Inc

700 Veterans Memorial Hwy

Hauppauge, NY11788

Zetex (Asia) Ltd

3701-04 Metroplaza, Tower 1

Hing Fong Road

Kwai Fong

Hong Kong

Telephone: (852) 26100 611

Fax: (852) 24250 494

Germany

Telefon: (49) 89 45 49 49 0

Fax: (49) 89 45 49 49 49

USA

Telephone: (631) 360 2222

Fax: (631) 360 8222

These offices are supported by agents and distributors in major countries world-wide.

This publication is issued to provide outline information only which (unless agreed by the Company in writing) may not be used, applied or reproduced

for any purpose or form part of any order or contract or be regarded as a representation relating to the products or services concerned. The Company

reserves the right to alter without notice the specification, design, price or conditions of supply of any product or service.

For the latest product information, log on to www.zetex.com

ISSUE 1 - APRIL 2002

ZXBM2003X10TC [ZETEX]

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