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LB1999 Datasheet(PDF) 4 Page - Sanyo Semicon Device

No. de pieza LB1999
Descripción Electrónicos  Three-Phase Brushless Motor Driver for VCR Capstan Motors
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Fabricante Electrónico  SANYO [Sanyo Semicon Device]
Página de inicio  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LB1999 Datasheet(HTML) 4 Page - Sanyo Semicon Device

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Control Function and Current Limiter Function
Pin Descriptions
No. 5975-4/8
LB1999M
Control Characteristics
Control Limiter Characteristics
Slope: 0.50 A/V (typical)
Pin No.
Pin
Function
Equivalent circuit
Input used when the FG amplifier is used as an inverting
input. A feedback resistor must be connected between FGOUT
and this pin.
3
FGIN+
Noninverting input used when the FG amplifier is used as a
differential input amplifier. No bias is applied internally.
4
FGIN
FG amplifier output. There is an internal resistive load.
5
FGOUT
Control reference voltage. While this pin is set to about
0.43
× VCC internally, this voltage can be modified by
applying a voltage from a low-impedance circuit.
(The input impedance is about 4.3 k
Ω).
6
FGS
Speed control loop frequency characteristics correction.
9
FC
Speed control input. The control implemented is fixed current
drive controlled by current feedback from Rf.
Gm = 0.58/V (typical) when Rf = 0.5
Ω.
7
CTL
Current limiter function control. The output current can be
varied linearly by applying a voltage to this pin.
The slope is 0.5 A/V (typical) when Rf = 0.5
Ω.
8
LIM
U phase Hall element inputs.
Logic high is defined as states where IN+ > IN–.
10
11
UIN+
UIN
V phase Hall element inputs.
Logic high is defined as states where IN+ > IN–.
12
13
VIN+
VIN
W phase Hall element inputs.
Logic high is defined as states where IN+ > IN–.
14
15
WIN+
WIN
Power supply for all internal blocks other than the output
block. This voltage must be stabilized so that noise and ripple
do not enter the IC.
16
VCC
Continued on next page.


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