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PDF ZXBM1021 Data sheet ( Hoja de datos )

Número de pieza ZXBM1021
Descripción SINGLE PHASE VARIABLE SPEED MOTOR CONTROL PRE-DRIVER
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ZXBM1021
SINGLE PHASE VARIABLE SPEED MOTOR CONTROL PRE-DRIVER
Description
The ZXBM1021 is a high performance, low noise, single-phase,
Direct Current Brushless (BLDC) motor pre-driver with variable PWM
speed control and current control suitable for fan and blower motors.
For system flexibility the motor speed can be controlled by either an
external PWM control signal or by a DC voltage signal from an
external control voltage or from a Thermistor network.
To prevent motor inrush current the device has a soft start feature. To
help protect the motor coil, the ZXBM1021 provides rotor lock
protection which shuts down the output drive if rotor lock is detected.
The device automatically re-starts with soft-start when the rotor lock is
removed. The ZXBM1021 monitors the motor current to provide a
programmable over current limit.
A Tachometer output is provided by the open collector output
Frequency Generator (FG) pin which allows external interface to
monitor motor rotation or speed. The FG output is the magnetic
change frequency.
The ZXBM1021 is available in space saving and low profile
U-QFN4040-20 and industry standard QSOP-20 packages.
Features
Operating voltage: 6.8V to 18V
Can be extended with external regulator
Speed control via external PWM, DC or Thermistor signals
Low noise, high efficiency
Soft start
Integrated current control
Reference voltage output
Built-in Hall amplifier for direct connection of Hall element
Rotor Lock Protection
Lock detection, output shutdown and automatic re-start
Minimum speed setting
Frequency generator (FG) output
Thermally enhanced space saving low profile U-QFN4040-20 and
industry standard QSOP-20 packages
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Pin Assignments
(Top View)
HBIAS
ThRef
PWMSPD
SPD
CSPD
ZXBM1021
Ph1Lo
Ph2Lo
Ph1Hi
SetThRef
Sense
U-QFN4040-20
Vcc 1
H+
H-
HBIAS
ThRef
PWMSPD
SPD
CSPD
SMIN
CLCK
10
(Top View)
ZXBM1021
20 V+OP
Ph2Hi
Ph1Lo
Ph2Lo
Ph1Hi
SetThRef
Sense
SetTh
FG
11 GND
QSOP-20
Applications
Personal, servers and mainframe computers cooling fans
Instrumentation and equipment cooling fans
Home appliance fans and blowers
Central heating blowers and extraction systems
Industrial fans, blower and extractors
Hand dryers
Hand-held power tools
Pumps
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
ZXBM1021
Document number: DS36322 Rev. 2 - 2
1 of 25
www.diodes.com
April 2014
© Diodes Incorporated

1 page




ZXBM1021 pdf
ZXBM1021
Absolute Maximum Ratings (Note 6) @TA = +25°C, unless otherwise specified.)
Symbol
VCCMAX
ICCMAX
PDMAX
TST
TJ
ESD HBM
ESD MM
Characteristics
Supply Voltage (Note 7)
IC Input Current
Power Dissipation
(See thermal de-rating curve on ‘Thermal Performance’ section)
Storage Temperature Range
Maximum Junction Temperature
Human Body Model (HBM) ESD Capability
Machine Model (MM) ESD Protection
U-QFN4040-20
QSOP-20
Values
-0.6 to 20
200
820
820
-55 to +150
150
2
300
Unit
V
mA
mW
mW
°C
°C
kV
V
Notes:
6. Stresses greater than the 'Absolute Maximum Ratings' specified above may cause permanent damage to the device. These are stress ratings only;
functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be
affected by exposure to absolute maximum rating conditions for extended periods of time.
7. The absolute maximum VCC of 20V is a transient stress rating and is not meant as a functional operating condition. It is not recommended to operate
the device at the absolute maximum rated conditions for any period of time.
Recommended Operating Conditions
Symbol
VCC
TA
Characteristic
Supply Voltage
Operating Temperature Range
Conditions
Operating, -40°C to +110°C
Operating
Min Max Unit
6.8 18.0 V
-40
+110
°C
Electrical Characteristics (@TA = +25°C, VDD = 12V, unless otherwise specified.)
Symbol
Characteristics
ICC Supply Current
Hall Connections
VIN Hall Amplifier Input Voltage
VCM Hall Amplifier Common Mode Voltage
VHYS
Hall Amplifier Input Hysteresis
IBS Hall Amplifier Bias Current
VHB Hall Bias Voltage
IHB Hall Bias Output Current Capability
Reference Voltage
VThRef
ThRef Reference Output Voltage
IOThRef
ThRef Output Current Capability
PWM Oscillator
FPWM
PWM Frequency
DC Voltage Speed Control
VSPDL
SPD Voltage Minimum
VSPDH
ISPD
SPD Voltage Maximum
SPD Pin Current at speed demand of 50%
of the full speed and without minimum
speed setting
ISPD_SMIN2V
SPD Pin Current with minimum speed
setting of 50% of the full speed
LinSPD
SPD Pin voltage to output PWM linearity
Conditions
No Load (Note 8)
Diff peak to peak
IHB = 10mA
IOThRef = 10mA, +25°C
IOThRef = 10mA, -40°C to +110°C
100% PWM drive
0% PWM drive
VSPD = 2V
SMIN = 0V
VSPD = 3V
RSPD =10kΩ
SMIN = 2V
VSPD = 2V
Note:
8. Measured with pins H+, H-, CLCK and CPWM and all other signal pins open circuit.
Min
40
0.5
1.5
4.85
4.75
18
Typ Max Unit
10 15 mA
±12
700
1.75
VThRef
1000
1.95
10
mV
V
mV
nA
V
mA
5 5.15 V
5 5.25 V
10 mA
25 kHz
1V
3V
0.5 2 µA
100 µA
——3 %
ZXBM1021
Document number: DS36322 Rev. 2 - 2
5 of 25
www.diodes.com
April 2014
© Diodes Incorporated

5 Page





ZXBM1021 arduino
ZXBM1021
Application Information
The ZXBM1021 is primarily controlled by a voltage on the SPD pin or a PWM signal on the PWMSPD pin.
A voltage of 1V represents a 100% PWM at the Phase Outputs and in turn represents full speed. 3V on the SPD pin conversely represents 0%
PWM. The motor can therefore be controlled simply by applying a control voltage onto the SPD pin with the minimal use of external components.
This voltage control method easily lends itself to control by other signal types. For example if a thermistor is applied to the SPD pin a varying
voltage can be generated at the SPD pin as the resistance of the thermistor varies with temperature.
A common form of control of fans is by a PWM signal derived from a central processor or controller. This speed control PWM signal can be
applied to PWMSPD pin. Motor speed is proportional to the duty ratio of the applied PWM speed control signal on PWMSPD pin.
Voltage on the SMIN pin sets the minimum speed of the motor. If the speed demand by either DC signal on SPD pin or PWM signal on PWMSPD
pin is lower than the minimum speed setting, motor will run at minimum speed.
The design of a motor system will be set around the maximum speed, the minimum speed and the current of the motor. The design of the motor
coil and the voltage on the output stage will set the maximum speed of the motor.
The ZXBM1021 allows easy setting and control of the minimum speed and maximum motor current, as well as for controlling the speed.
DC Speed Control
The SPD pin will respond to an input DC voltage from 3V to 1V for 0% to 100% of the full speed. To allow internal minimum speed setting (SMIN)
and current control (ILIM) circuits to adjust the SPD pin voltage, the speed control DC voltage signal should be driven in via a 10kΩ series
resistor. The series resistor allows the SPD pin to vary even when driven externally by a low impedance source. A 0.1µF capacitor should be
connected from the SPD pin to supply ground.
20 19 18 17 16
DC Speed Control
(3V to 1V)
R
10kΩ
C
0.1µF
1
HBIAS
2
ThRef
3
PWMSPD
4
SPD
5
CSPD
ZXBM1021
15
Ph1Lo
14
Ph2Lo
13
Ph1Hi
12
SetThRef
11
Sense
6 7 8 9 10
When used in DC speed control mode, PWMSPD and CSPD pins should be left floating.
ZXBM1021
Document number: DS36322 Rev. 2 - 2
11 of 25
www.diodes.com
April 2014
© Diodes Incorporated

11 Page







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