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PDF LB1987M Data sheet ( Hoja de datos )
| Número de pieza | LB1987M | |
| Descripción | Three-Phase Brushless Motor Driver for VCR Capstan Motors | |
| Fabricantes | Sanyo | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LB1987M (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
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Ordering number : ENN6109A
Monolithic Digital IC
LB1987, 1987D, 1987M, 1987H
Three-Phase Brushless Motor Driver
for VCR Capstan Motors
Overview
The LB1987, LB1987D, LB1987M, and LB1987H are
optimal capstan motor drivers for use in VCR sets.
Functions
• Three-phase full-wave current-linear drive
• Torque ripple correction circuit (fixed correction ratio)
• Current limiter circuit with control characteristics gain
switching
• Oversaturation prevention circuits for both the upper and
lower sides of the output stage (No external capacitors
are required.)
• FG amplifier
• Thermal shutdown circuit
Package Dimensions
unit: mm
3240-QFP34H-B
3147B-DIP28H
28
[LB1987D]
15
R1.7
1 20.0 14
27.0
1.93 1.78
0.6 1.0
3129-MFP36S-LF
36
[LB1987M]
19
SANYO: DIP28H
[LB1987]
13.2
1.6 10.0
23
4.8 0.8 1.0
18
0.2
24 17
34
1
7
6
4.0
SANYO: QFP34H-B
1 18 0.25
15.3
0.4
3233-HSOP28H
28
0.8 0.85 SANYO: MFP36S-LF
[LB1987H]
15.3
6.2
2.7
15
1
0.85
14
0.25
0.8 0.3
SANYO: HSOP28H
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
81299RM (OT) No. 6109-1/17
1 page  
LB1987, 1987D, 1987M, 1987H
Continued from preceding page.
Pin Function
Forward/reverse selection.
The direction (forward or reverse) is selected by the voltage applied to this
FR pin.
(Vth = 2.5 Vtyp at VCC = 5 V)
External torque ripple correction ratio adjustment.
To adjust the correction ratio, apply the stipulated voltage to the ADJ pin FR
from a low-impedance external circuit.
If the applied voltage is increased, the correction ratio falls, and if the applied
200 Ω
ADJ 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 kΩ.)
Equivalent circuit diagram
VCC
200 µA
VCC
VCC
20 µA
VCC
ADJ
1/2
VCC
6 kΩ
500 Ω
6 kΩ
A12210
FGIN–
Input used when the FG amplifier inverting input is used. Connect a
feedback resistor between the FGOUT pin and this pin.
FGIN+
Non-inverting input used when the FG amplifier is used as a differential input
amplifier.
No bias is applied internally.
FGOUT
FG amplifier output.
This pin includes an internal load resistor.
5 µA
FGin(–)
300 Ω
VCC VCC
FGin(+)
300 Ω
VCC
A12211
FGOUT
300 Ω
FC
FC Speed control loop frequency characteristics correction.
GND
Ground for all systems other than the output transistors.
Note that the lowest potential of the output transistors is determined by the
Rf pin.
FGS
FG pulse output.
This pin includes an internal load resistor.
(The output impedance is about 3 kΩ.)
Power supply for all IC internal circuits other than the output block.
VCC This power supply must be stabilized to prevent ripple or other noise from
entering the circuit.
GSENSE
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.)
A12212
VCC VCC VCC
FGS
A12517
GSENSE
A12518
No. 6109-5/17
5 Page 
LB1987, 1987D, 1987M, 1987H
Sample Application Circuit (LB1987)
LB1987
No. 6109-11/17
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet LB1987M.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LB1987 | Three-Phase Brushless Motor Driver for VCR Capstan Motors | Sanyo |
| LB1987D | Three-Phase Brushless Motor Driver for VCR Capstan Motors | Sanyo |
| LB1987H | Three-Phase Brushless Motor Driver for VCR Capstan Motors | Sanyo |
| LB1987M | Three-Phase Brushless Motor Driver for VCR Capstan Motors | Sanyo |
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