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PDF LB1978 Data sheet ( Hoja de datos )
| Número de pieza | LB1978 | |
| Descripción | Three-Phase Half-Wave Sensorless Motor Driver for Headphone Stereos | |
| Fabricantes | Sanyo | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LB1978 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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Ordering number : EN6186
LB1978V
Monolithic Digital IC
LB1978V
Three-Phase Half-Wave Sensorless Motor Driver
for Headphone Stereos
Functions and Features
• Three-phase sensorless motor driver
• Built-in speed control
• Built-in reference voltage and forward/reverse
switching pin
• Soft switching
• Built-in short brake drive pin
Package Dimensions
unit: mm
3191-SSOP30
[LB1978V]
30 16
1 15 0.15
9.95
0.22
Specifications
Absolute Maximum Ratings at Ta = 25˚C
Parameter
Symbol
Maximum supply voltage
Vcc max
Output transistor withstand voltage
Vsus
Maximum output current
Io max
Allowable power dissipation
Pd max Tj = 125˚C
Operating temperature
Topr
Storage temperature
Tstg
Allowable Operating Ranges at Ta = 25˚C
Parameter
Symbol
Power supply voltage
Vcc
Conditions
Conditions
0.65 0.43
SANYO : SSOP30
Ratings
2.0
4
0.6
0.4
0 to 60
–40 to +125
Unit
V
V
A
W
˚C
˚C
Ratings
1.0 to 1.7
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. 6186-1/9
1 page  
Pin Description
Pin number Pin name
1 FC
2 OSC
3 COM
4 IRF
5 CI
LB1978V
Equivalent circuit
Vcc
1
PGND
Vcc
2
SGND
Vcc
PGND
Vcc
3
10kΩ
120µA
4
SGND
Vcc
25µA
5
SGND
Pin function
Oscillator and ripple suppression pin.
The higher the capacitance connected to
FG, the more effectively will ripple
components be suppressed.
Startup pulse cycle and drive switching
cycle setting pin.
Increased capacitance will result in higher
startup pulse cycle and drive switching
cycle.
Startup waveform detector offset setting
pin.
RCOM = 1 kΩ results in approx. 25 mV
offset at startup
Oscillator circuit and F-V servo circuit
internal current setting pin.
Speed adjustment pin using CR
oscillation based on FG pulse edge
detection.
Continued on next page
No. 6186-5/9
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet LB1978.PDF ] | |
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