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LB1987 датащи(PDF) 5 Page - Sanyo Semicon Device

номер детали LB1987
подробное описание детали  Three-Phase Brushless Motor Driver for VCR Capstan Motors
Download  17 Pages
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производитель  SANYO [Sanyo Semicon Device]
домашняя страница  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LB1987 датащи(HTML) 5 Page - Sanyo Semicon Device

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No. 6109-5/17
LB1987, 1987D, 1987M, 1987H
Continued from preceding page.
Pin
Function
Equivalent circuit diagram
Forward/reverse selection.
The direction (forward or reverse) is selected by the voltage applied to this
pin.
(Vth = 2.5 Vtyp at VCC = 5 V)
FR
A12210
200
FR
200
µA
1/2
VCC
VCC
VCC
VCC
VCC
ADJ
6 k
500
6 k
20
µA
Input used when the FG amplifier inverting input is used. Connect a
feedback resistor between the FGOUT pin and this pin.
FGIN
300
300
5
µA
FGin(–)
FGin(+)
A12211
300
FGOUT
VCC
VCC
VCC
FC
A12212
FGS
VCC VCC
VCC
A12517
GSENSE
A12518
Non-inverting input used when the FG amplifier is used as a differential input
amplifier.
No bias is applied internally.
FGIN+
FG amplifier output.
This pin includes an internal load resistor.
FGOUT
Speed control loop frequency characteristics correction.
FC
Ground for all systems other than the output transistors.
Note that the lowest potential of the output transistors is determined by the
Rf pin.
GND
FG pulse output.
This pin includes an internal load resistor.
(The output impedance is about 3 k
Ω.)
FGS
Power supply for all IC internal circuits other than the output block.
This power supply must be stabilized to prevent ripple or other noise from
entering the circuit.
VCC
Ground sensing.
The influence of the common ground impedance on Rf can be excluded by
connecting this pin to ground near the Rf resistor side of the motor ground
wiring that includes Rf.
(This pin must not be left open.)
GSENSE
External torque ripple correction ratio adjustment.
To adjust the correction ratio, apply the stipulated voltage to the ADJ pin
from a low-impedance external circuit.
If the applied voltage is increased, the correction ratio falls, and if the applied
voltage is lowered, the correction ratio increases.
The range of variation is from 0 to two times the correction ratio when the pin
is left open.
(This pin is set to about VCC/2 internally, and has an input impedance of
about 5 k
Ω.)
ADJ


Аналогичный номер детали - LB1987

производительномер деталидатащиподробное описание детали
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Аналогичное описание - LB1987

производительномер деталидатащиподробное описание детали
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