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PDF ZXBM1004 Data sheet ( Hoja de datos )
| Número de pieza | ZXBM1004 | |
| Descripción | VARIABLE SPEED SINGLE-PHASE BLDC MOTOR CONTROLLER | |
| Fabricantes | Zetex Semiconductors | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ZXBM1004 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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ZXBM1004
VARIABLE SPEED SINGLE-PHASE BLDC MOTOR CONTROLLER
DESCRIPTION
The ZXBM1004 is a single-phase, DC brushless motor pre-driver with PWM
variable speed control suitable for fan and blower motors. The controller is
intended for applications where the fan or blower speed is controlled by an
external PWM signal, thermistor or DC voltage.
FEATURES
• Compliant with external PWM speed control
• Compliant with thermistor control
• Minimum speed setting
• Low noise
• Auto restart
• Built in hall amplifier
• Speed pulse (FG) and lock rotor (RD) outputs
• Up to 18V input voltage (60V with external regulator)
• QSOP16 package
Associated application notes:-
AN41 - Thermistor control
AN42 - External PWM control
AN43 - Interfacing to the motor windings
QSOP16
APPLICATIONS
• Mainframe and personal computer fans and blowers
• Instrumentation fans
• Central heating blowers
• Automotive climate control
ORDERING INFORMATION - QSOP16
DEVICE
REEL SIZE
ZXBM1004Q16TA
ZXBM1004Q16TC
7" (180mm)
13" (330mm)
DEVICE MARKING
• ZETEX
ZXBM
1004
TAPE WIDTH
12mm
12mm
QUANTITY PER REEL
500
2,500
ISSUE 4 - SEPTEMBER 2004
1
SEMICONDUCTORS
1 page  
ZXBM1004
PIN FUNCTIONAL DESCRIPTION
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.
ThRef - Network Reference
This is a reference voltage of nominal 3V. It is designed
for the ability to 'source' and therefore it will not 'sink'
any current from a higher voltage.
The total current drawn from the pin by the minimum
speed potential divider to pin SMIN and any voltage
setting network should not exceed 1mA at maximum
temperature.
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.
SMIN - Sets Minimum Speed
A voltage can be set on this pin via a potential divider
between the ThRef and Gnd. This voltage is monitored
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 minimum 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.
CPWM - Sets PWM Frequency
This pin has an external capacitor attached to set the
PWM frequency for the Phase drive outputs. A
capacitor value of 0.1nF will provide a PWM frequency
of typically 24kHz.
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.
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.
The CPWM timing period (TPWM) is determined by the
following equation:
TPWM
=
(VTHH
− VTHL)
I PWMC
xC
+
(VTHH
− VTHL)
I PWMD
x
C
Where:
C = CPWM +15, in pF
VTHH and VTHL are the CPWM pin
threshold voltages
IPWMC and IPWMD are the charge and
discharge currents in A.
TPWM is in ms
ISSUE 4 - SEPTEMBER 2004
5
SEMICONDUCTORS
5 Page 
ZXBM1004
ISSUE 4 - SEPTEMBER 2004
11
SEMICONDUCTORS
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet ZXBM1004.PDF ] | |
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