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PDF ZXBM2003 Data sheet ( Hoja de datos )
| Número de pieza | ZXBM2003 | |
| Descripción | VARIABLE SPEED 2-PHASE FAN MOTOR CONTROLLER | |
| Fabricantes | Zetex Semiconductors | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ZXBM2003 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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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
ZXBM200xX10TA
7” (180mm)
ZXBM200xX10TC
13” (330mm)
TAPE WIDTH
12mm
12mm
QUANTITY PER REEL
1,000
4,000
Example: ZXBM2001X10TA
DEVICE MARKING
ZXBM2001 - BM21
ZXBM2002 - BM22
ZXBM2003 - BM23
ISSUE 1 - APRIL 2002
1
1 page  
ZXBM2001
ZXBM2002 ZXBM2003
Locked Rotor timing capacitor (CONT).
The CLCK timing periods are determined by the
following equations:
VTHH × CLCK
Tlock =
ILCKC
(VTHH − VTHL) × CLCK
Toff =
ILCKD
(VTHH − VTHL) × CLCK
Ton =
ILCKC
Where VTHH and VTHL are the CLCK pin threshold
voltages and ILCKC and ILCKD are the charge and
discharge currents.
9. PH2 - External transistor driver
10. PH1 - External transistor driver
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.
Lock and FG Timing Waveform:
As these threshold voltages are nominally set to
VTHH=2V and VTHL=1V the equations can be simplified
as follows:
2 × CLCK
Tlock = ILCKC
CLCK
Ton = ILCKC
CLCK
Toff = ILCKD
8. 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 0.15nF will provide a PWM
frequency of typically 24kHz.
The CLCK timing period (Tpwm) is determined by the
following equation:
Lock Timing Example:
(VTHH − VTHL) × CPWM (VTHH − VTHL) × CPWM
Tpwm =
IPWMC
+
IPWMD
Where VTHH and VTHL are the CPWM pin threshold
voltages and IPWMC and IPWMD are the charge and
discharge currents.
As these threshold voltages are nominally set to
VTHH=2V and VTHL=1V the equations can be simplified
as follows:
CPWM CPWM
Tpwm = IPWMC + IPWMD
Using the equation previously described and to be
found under the CLCK pin description:
2 × CLCK
Tlock = ILCKC
CLCK
Ton = ILCKC
CLCK
Toff = ILCKD
Using a value of CLCK = 1.0uF together with the values
of ILCKC and ILCKD to be found in the Electrical
Characteristics we can derive the following timings for
operation at 12V and 25°C.
2 × 1.0F
Tlock = 2.8A = 0.714s
1.0F
Toff = 0.28A = 3.6s
2 × 1.0F
Ton = 2.8A = 0.36s
ISSUE 1 - APRIL 2002
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet ZXBM2003.PDF ] | |
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