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LB11660RV-MPB-H Arkusz danych(PDF) 6 Page - ON Semiconductor

Numer części LB11660RV-MPB-H
Szczegółowy opis  Half-pre Motor Driver Single-Phase Full-Wave Drive
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Producent  ONSEMI [ON Semiconductor]
Strona internetowa  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

LB11660RV-MPB-H Arkusz danych(HTML) 6 Page - ON Semiconductor

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LB11660RV
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Sample Application Circuit 1
*1 <Power supply - GND wiring>
GRD of the IC is connected to the control circuit power supply system and GRD of the external N-channel is
connected to the motor power supply system. Groundings must be installed separately and all external control
components must be connected to the GND line of the IC.
*2 <Power stabilization capacitor for regeneration>
For the CM capacitor, that is a power stabilization capacitor for PWM drive and for absorption of kick-back, a
capacitance of 4.7
F/25V or higher must be used. The CM capacitor must be connected without fail to prevent the
IC from being damaged when power is tuned on or off.
*3 <Speed control>
1) Control voltage
The PWM duty ratio is determined by comparing the VTH pin voltage and the PWM oscillation waveforms.
When the VTH pin voltage drops, the 'ON' duty ratio increases, and when it drops to or below the PWM output L
level voltage, the duty ratio is 100%.
2) Thermistor
In thermistor applications, the 6VREG voltage is usually divided by a resistor, and the voltage thus generated is
supplied to the VTH pin.
The PWM duty ratio is varied by the changes in the VTH pin voltage which result from changes in temperature.
*4 < Setting the current limiter >
The current limiter is actuated when the voltage of the current-sensing resistors between VCC and VM increases to
0.5V or more.
Since the current of a current limiter circuit is limited by the current determined by IO = VRf/Rf (where VRf = 0.5V
typ, Rf: current-sensing resistance), the current limiter is actuated at IO = 1A when Rf = 0.5. The Rf resistor must
be connected without fail, and its constant must be within the recommended operating range for current limiters.
VCC
RD
OUT1
OUT2
CT=0.47 to 1
F
CT
VTH
IN+
IN-
CPWM
*5
CP=200pF *f=23kHz
CP=100pF *f=46kHz
*1
*7
H
*2
HB
GND
*6
*8
6VREG
VM
Rf
*4
Control voltage
RMI
R3
PRE1
PRE2
*3
*9
CM=4.7
F
or higher
R4


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