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PDF LB1877M Data sheet ( Hoja de datos )
| Número de pieza | LB1877M | |
| Descripción | Brushless Motor Driver with Speed Control for Portable Cassette Recorders | |
| Fabricantes | Sanyo | |
| Logotipo |  |
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Ordering number : EN6199A
LB1877M
Monolithic Digital IC
LB1877M
Brushless Motor Driver with Speed Control
for Portable Cassette Recorders
Overview
The LB1877M is a motor driver well suited for driving
motors of minicassette recorders, headphone stereos, and
microcasette recorders that use a 3V power supply.
Package Dimensions
unit: mm
3036B-MFP20
[LB1877M]
20 11
Functions and Features
• Brushless sensorless motor drive (3-phase half-wave drive)
• Forward/reverse drive possible
• Built-in speed control function (voltage servo)
• Built-in reference voltage (0.9V)
• Soft switching
1
12.6
0.35
10
0.15
1.27 0.59
SANYO : MFP20
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Maximum output current
Allowable power dissipation
Symbol
VCC max
IO max
Pd max
Operating temperature
Storage temperature
Topr
Tstg
Allowable Operating Ranges at Ta = 25°C
Parameter
Symbol
Power supply voltage
VCC
Conditions
Conditions
Ratings
6.0
0.5
0.5
–10 to +80
–40 to +150
Unit
V
A
W
°C
°C
Ratings
1.8 to 5.0
Unit
V
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
63099RM(KI) No. 6199-1/7
1 page  
Pin Description
Pin number Pin name Pin voltage
18 VCC 1.8V to 5.0V
9 GND
12 VREF 0.7V to 0.9V
7 OSC 1V to Vcc
LB1877M
Unit (resistance: Ω, capacitance: F)
Equivalent circuit
Pin function
Power supply for all circuits
Ground for all circuits except
FC and power block.
Internal reference voltage.
Connected as speed control
voltage to IN+ pin via external
12 resistor.
50k
7
200
Startup oscillator pin.
Adjusts self-excitation
frequency via external
capacitor.
8 COM 1.3V to Vcc
To comparator input
10k
To VOUT To WOUT
To UOUT
20k 20k 20k
8
1k 20k
Determines threshold voltage
of waveform detection circuit.
Connected to Vcc via an
external resistor.
Varies the startup threshold
voltage.
14 VSP 0.1V to
Vcc – 0.7V
13 IN+
15 OUT
10 RI
To U,V,WOUT
10k 10k 10k
14
5k 200
Drive
current
I
10k
200
13 15 10
Peak detection circuit output
pin.
Error amplifier non-inverted
pin.
Controls rotation speed via
input pin voltage.
Error amplifier output pin.
Connect external resistor
between Vsp pins for
feedback.
Current feedback output pin.
Connect external resistor
between this pin and ground
for current feedback
adjustment.
Continued on next page
No. 6199-5/7
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet LB1877M.PDF ] | |
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