ZXBM2004Q16TC [ZETEX]
VARIABLE SPEED 2-PHASE BLDC MOTOR CONTROLLER; 变速2三相BLDC电机控制器型号: | ZXBM2004Q16TC |
厂家: | ZETEX SEMICONDUCTORS |
描述: | VARIABLE SPEED 2-PHASE BLDC MOTOR CONTROLLER |
文件: | 总12页 (文件大小:250K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
ZXBM2004
VARIABLE SPEED 2-PHASE BLDC MOTOR CONTROLLER
DESCRIPTION
The ZXBM2004 is a 2-phase, DC brushless m otor pre-driver with PWM
variable speed control suitable for fan and blower m otors. The controller is
intended for applications where the fan or blower speed is controlled by an
external PWM signal, therm istor or DC voltage.
FEATURES
QSOP16
• Com pliant with external PWM speed control
• Com pliant with therm istor control
• Minim um speed setting
• Low noise
• Auto restart
• Built in hall am plifier
• Speed pulse (FG) and lock rotor (RD) outputs
• Up to 18V input voltage (60V with external regulator)
• QSOP16 package
• Lead free product
Associated application notes:-
AN41 - Therm istor control
AN42 - External PWM control
AN43 - Interfacing to the m otor windings
APPLICATIONS
• Mainfram e and personal com puter fans and blowers
• Instrum entation fans
• Central heating blowers
• Autom otive clim ate control
ORDERING INFORMATION - QSOP16
REEL SIZE
TAPE WIDTH
QUANTITY PER REEL
2,500
DEVICE
13" (330m m )
12m m
ZXBM2004Q16TC
DEVICE MARKING
• ZETEX
ZXBM
2004
ISSUE 3 - MAY 2005
1
S E M IC O N D U C T O R S
ZXBM2004
ABSOLUTE MAXIMUM RATINGS
PARAMETER
S YMBOL
LIMITS
-0.6 to 20
100
UNIT
V
S u p p ly vo lta g e
V
CCm a x
CCm a x
In p u t cu rre n t
I
m A
V
-0.5 to V +0.5
CC
In p u t vo lta g e
V m a x
IN
-0.5 to V +0.5
CC
V
Ou tp u t vo lta g e
Po w e r d is s ip a tio n
V
m a x
OUT
P
T
T
500
m W
ЊC
Dm a x
Op e ra tin g te m p .
S to ra g e te m p .
-40 to 110
-55 to 125
OPR
S TG
ЊC
Pow er Dissipation
1) Maxim um allowable Power Dissipation, PD,
is shown plotted against Am bient Tem perature,
TA, in the accom panying Power Derating Curve,
indicating the Safe Operating Area for the device.
2) Power consum ed by the device, PT, can be
calculated from the equation:
PT = PQ + PPh
where PQ is power dissipated under quiescent
current conditions, given by:
P
Q = VCC x ICC
where VCC is the application
device Supply Voltage
and
ICC is the m axim um Supply
Current given in the Electrical
Characteristics
⍜j-a = 112°C/W
and
PPh is power generated due to either one of
the phase outputs Ph1 or Ph2 being
active, given by:
PPh = IOL x VOL
where IOL is the application Ph1 and Ph2
output currents
and
VOL is the m axim um Low Level
Output Voltage for the Ph1 and
Ph2 outputs given in the Electrical
Characteristics
ISSUE 3 - MAY 2005
2
S E M IC O N D U C T O R S
ZXBM2004
ELECTRICAL CHARACTERISTICS (at Tam b = 25°C & Vcc = 12V)
S YMBOL
MIN
TYP
MAX
UNIT CONDITIONS
PARAMETER
V
4.7
18
V
S u p p ly Vo lta g e
CC
1
I
5.5
7.5
m A No Lo a d
S u p p ly Cu rre n t
CC
V
40
m V d iff p -p
Ha ll Am p In p u t Vo lta g e
Ha ll Am p Co m m o n Mo d e Vo lta g e
Ha ll Am p In p u t Offs e t
Ha ll Am p Bia s Cu rre n t
PH1, PH2 Ou tp u t Hig h
PH1, PH2 Ou tp u t Lo w
PH1, PH2 Ou tp u t Lo w
PH1, PH2 Ou tp u t S o u rce Cu rre n t
PH1, PH2 Ou tp u t S in k Cu rre n t
IN
V
0.5
Vcc-1.5
-710
V
CM
V
±7
m V
n A
OFS
I
-400
BS
V
V
-2.2
V
-1.8
V
V
I
I
I
=-80m A
=16m A
CC
CC
OH
OL
OL
OH
2
V
0.4
0.6
0.6
OLA
3
V
0.4
V
=50A
OLB
I
-80
16
m A
m A
A
A
V
OH
I
OL
I
-4.5
-7.85
65
C
C
C
C
Ch a rg e Cu rre n t
PWMC
PWM
PWM
PWM
PWM
I
38
Dis ch a rg e Cu rre n t
PWMD
V
3
1
Hig h Th re s h o ld Vo lta g e
Lo w Th re s h o ld Vo lta g e
THH
V
V
THL
F
24
kHz
V
C
I
= 0.1n F
PWM Fre q u e n cy
Th Re f Vo lta g e
PWM
PWM
V
2.88
2.96
3.10
-1
=-100A
OTh Re f
Th Re F
I
m A
A
V
Th Re f Ou tp u t Cu rre n t
OTh Re f
I
-0.25
1
-0.3
V
= 2V,SPD=open
S
In p u t Cu rre n t
IN
IS MIN
MIN
V
100% PWM Drive
S PD Vo lta g e Min im u m
S PD Vo lta g e Ma xim u m
S PD In p u t Cu rre n t
S PDL
V
3
V
0% PWM Drive
S PDH
I
-0.8
-3.8
0.46
3
-2
A
A
A
V
V
= 2V
IN
IS PD
I
-2.8
C
C
C
C
Ch a rg e Cu rre n t
LCKC
LCK
LCK
LCK
LCK
I
0.54
Dis ch a rg e Cu rre n t
LCKD
V
Hig h Th re s h o ld Vo lta g e
Lo w Th re s h o ld Vo lta g e
THH
V
1
V
THL
1:12
Lo ck co n d itio n On :Off ra tio
FG & RD Low Level Output Current
FG & RD Low Level Output Voltage
Co m m u ta tio n d e a d tim e
I
5
m A
V
OL
V
0.5
I
= 5m A
OL
OL
t
7.5
s
CD
Notes:
1. Measured with pins H+, H-, CLCK and CPWM = 0V and all other signal pins open circuit.
2. Measured when opposing Phase Output is Low
3. Measured when opposing Phase Output is High
4. In this datasheet a negative sign for a current indicates current flowing out of the pin whilst no sign indicates current flowing into the pin.
ISSUE 3 - MAY 2005
3
S E M IC O N D U C T O R S
ZXBM2004
Block diagram
Pin assignm ents
1
Vcc
H+
H-
N/C
V+OP
Ph1
Ph2
N/C
FG
ZXBM2004
QSOP16
ThRef
SPD
CPWM
SMIN
Gnd
RD
CLCK
ISSUE 3 - MAY 2005
4
S E M IC O N D U C T O R S
ZXBM2004
PIN FUNCTIONAL DESCRIPTION
If required this pin can also be used as an enable pin.
The application of a voltage >3.0V will force the PWM
drive fully off, in effect disabling the drive.
H+ - Hall input
H- - Hall input
The rotor position is detected by a Hall sensor, with the
output applied to the H+ and H- pins. This sensor can be
either a 4 pin 'naked' Hall device or of the 3 pin buffered
switching type. For a 4 pin device the differential Hall
output signal is connected to the H+ and H- pins. For a
buffered Hall sensor the Hall device output is attached
to the H+ pin, with a pull-up attached if needed, whilst
the H- pin has an external potential divider attached to
hold the pin at half Vcc. When H+ is high in relation to
H-, Ph2 is the active drive.
SMIN - Sets Minim um Speed
A voltage can be set on this pin via a potential divider
between the ThRef and Gnd. This voltage is m onitored
by the SPD pin such that it cannot rise above it. As a
higher voltage on the SPD pin represents a lower speed
it therefore restricts the lower speed range of the fan. If
this feature is not required the pin is left tied to ThRef so
no m inim um speed will be set.
If the fan is being controlled from an external voltage
source onto the SPD pin then either this feature should
not be used or if it is required then a >1k⍀ resistor
should be placed in series with the SPD pin.
ThRef - Netw ork Reference
This is a reference voltage of nom inal 3V. It is designed
for the ability to 'source' and therefore it will not 'sink'
any current from a higher voltage.
CPWM - Sets PWM Frequency
The current drawn from the pin by the m inim um speed
potential divider to pin SMIN and any voltage setting
network should not exceed 1m A in total at m axim um
tem perature.
This pin has an external capacitor attached to set the
PWM fre q u e n cy fo r th e Ph a s e d rive o u tp u ts . A
capacitor value of 0.1nF will provide a PWM frequency
of typically 24kHz.
The CPWM tim ing period (TPWM) is determ ined by the
following equation:
SPD - Speed Control Input
The voltage applied to the SPD pin provides control
over the Fan Motor speed by varying the Pulse Width
Modulated (PWM) drive ratio at the Ph1Lo and Ph2Lo
outputs. The control signal takes the form of a voltage
input of range 3V to 1V, representing 0% to 100% drive
respectively.
(VTHH − VTHL) x C (VTHH − VTHL) x C
TPWM
=
+
IPWMC
IPWMD
Where:
C = CPWM +15, in pF
VTHH a n d VTHL a r e t h e CP W M p in
threshold voltages
If variable speed control is not required this pin can be
left with an external potential divider to set a fixed
speed or tied to ground to provide full speed i.e. 100%
PWM drive.
IPWMC and IPWMD are the charge and
discharge currents in A.
TPWM is in m s
ISSUE 3 - MAY 2005
5
S E M IC O N D U C T O R S
ZXBM2004
FG - Frequency Generator (speed) output
This is the Frequency Generator output and is a
buffered signal from the Hall sensor.
As these threshold voltages are nom inally set to VTHH
=
3V and VTHL = 1V the equations can be sim plified as
follows:
2C
2C
This is an open collector drive giving an active pull
down with the high level being provided by an external
pull up resistor.
TPWM
=
+
IPWMC IPWMD
CLCK - Locked rotor tim ing capacitor
Ph1Lo & Ph2Lo - Driver
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 predeterm ined tim e (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 attem pt
to re-start the fan. This cycle of (TOFF) and (TON) will be
repeated indefinitely or until the fan re-starts.
This pair of outputs drive the external devices. These
outputs provide both the com m utation and PWM
waveform s. The outputs are of the Darlington em itter
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 80m A 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 16m A when driving low to aid turn off
tim es during PWM operation. When the Phase is
inactive the output is held low by an internal pull-down
resistor.
GND - Ground
This is the device supply ground return pin and will
generally be the m ost negative supply pin to the fan.
V+OP - Phase Outputs Supply Voltage
RD - Locked Rotor error output
This pin is the supply to the Phase outputs and will be
co n n e cte d d iffe re n tly d e p e n d a n t u p o n e xte rn a l
transistor type.
This pin is the Locked Rotor output as referred to in the
C
LCK tim ing section above. It is high when the rotor is
stopped and low when it is running.
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.
This is an open collector drive giving an active pull
down with the high level being provided by an external
pull up resistor.
For MOSFET devices the pin will connect directly to the
VCC pin.
ISSUE 3 - MAY 2005
6
S E M IC O N D U C T O R S
ZXBM2004
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 m axim um rating for the device this will be
supplied from an external regulator such as a Zener
diode.
RD Tim ing Waveform :
Hall
VTHH
CLCK
VTHL
TOn
TLock
TOff
RD
FG
Applications Inform ation
The ZXBM2004 is prim arily controlled by a voltage on A com m on form of control of fans is by a PWM signal
the SPD pin. A voltage of 1V represents a 100% PWM at derived from a central processor or controller. This
the Phase Outputs and in turn represents full speed. 3V signal can be converted into a voltage and that voltage
on the SPD pin conversely represents 0% PWM. The adjusted as neccesary to com pensate for m otor none
m otor can therefore be controlled sim ply by applying a linearity, inclusion of the Minim um speed feature etc.
control voltage onto the SPD pin with the m inim al use
of external com ponents.
Full applications details and further exam ples of how
to co n tro l th e ZXBM2004 a re a va ila b le in th e
This voltage control m ethod easily lends itself to Applications Notes AN41, AN42 and AN43.
co n tro l b y o th e r sig n a l typ e s. Fo r e xa m p le if a
therm istor is applied to the SPD pin a varying voltage
can be generated at the SPD pin as the resistance of the
therm istor varies with tem perature.
ISSUE 3 - MAY 2005
7
S E M IC O N D U C T O R S
ZXBM2004
Figure 1: 12V Typical circuit for therm istor controlled speed
Figure 2: Typical circuit for external PWM controlled speed (single MOSFET)
ISSUE 3 - MAY 2005
8
S E M IC O N D U C T O R S
ZXBM2004
Figure 3: Typical circuit for 48V input and external PWM control
Figure 4: Typical circuit for constant speed operation
ISSUE 3 - MAY 2005
9
S E M IC O N D U C T O R S
ZXBM2004
Drive transisitors
Zetex offers a range of devices that are ideally suited to
interface between the ZXBM2004 controller and the
m otor. The following tables show a selection of
products. If your needs are not covered by this
s e le c t io n t h e n p le a s e r e fe r t o t h e t h e m o r e
com prehensive listings that can be found on the Zetex
website: w w w .zetex.com
MOSFETs
Po la rit y
BV
I
R
@ V = 10
GS
Pa cka g e
Pa rt Nu m b e r
DS S
D
DS (o n )
V
A
7.7
2.4
2.1
1.4
11.2
4.7
3.2
2.2
N
N
100
100
100
100
60
0.085
0.35
0.25
0.7
DPAK
S OT223
S O8
ZXMN10A09K
ZXMN10A11G
ZXMN10A08DN8
ZXMN10A07Z
ZXMN6A09K
ZXMN6A25DN8
ZXMN6A11Z
2 x N
N
S OT89
DPAK
S O8
N
0.045
0.055
0.14
0.3
2 x N
N
60
60
S OT89
S OT89
N
60
ZXMN6A07Z
Bipolar Transistors
Po la rit y
V
I
V
@ I / I
B
Pa cka g e
Pa rt Nu m b e r
CEO
V
C
CE(s a t )
C
A
4
1
6
1
3
6
1
3
2
m V @ A/ m A
65 @ 0.5/50
150 @ 0.5/50
125 @ 2/100
300 @ 0.5/50
200 @ 1/10
135 @ 2/50
500 @ 1/50
260 @ 2/50
220 @ 2/50
NPN
NPN
NPN
NPN
NPN
NPN
NPN
NPN
NPN
150
125
100
100
75
S OT223
S OT23
S OT223
S OT89
S OT89
S OT223
S OT89
S OT89
S OT23
FZT855
FMMT624
ZX5T853G
FCX493
FCX1053A
ZX5T851G
FCX493A
FCX619
60
60
50
50
FMMT619
ISSUE 3 - MAY 2005
10
S E M IC O N D U C T O R S
ZXBM2004
Notes:
ISSUE 3 - MAY 2005
11
S E M IC O N D U C T O R S
ZXBM2004
PACKAGE OUTLINE QSOP16
PACKAGE DIMENSIONS
Dim
Millim e t e rs
In ch e s
Min .
0.053
0.004
0.049
0.189
Ma x.
0.069
0.010
0.059
0.197
Min .
Ma x.
1.75
0.25
1.50
5.00
A
A1
A2
D
1.35
0.10
1.25
4.80
0.009 Re f
0.228
0.23 BS C
ZD
E
0.244
0.157
0.050
5.79
3.81
0.41
6.20
3.99
1.27
E1
L
0.150
0.016
e
0.025 BS C
0.64 BS C
b
0.008
0.007
0°
0.012
0.010
8°
0.20
0.18
0°
0.30
0.25
8°
c
θ
h
0.010
0.020
0.25
0.50
Note: Dim ensions in inches are control dim ensions, dim ensions in m illim eters are approxim ate.
© Zetex Sem iconductors plc 2005
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ISSUE 3 - MAY 2005
12
S E M IC O N D U C T O R S
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