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PDF LB1825 Data sheet ( Hoja de datos )
| Número de pieza | LB1825 | |
| Descripción | Three-Phase Brushless Motor Driver | |
| Fabricantes | Sanyo | |
| Logotipo |  |
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Ordering number : EN4845B
Monolithic Digital IC
LB1825
Three-Phase Brushless Motor Driver
Overview
The LB1825 is a three-phase brushless motor driver IC
optimal for LBP polygon mirror and magneto-optical disk
spindle motor drive.
Functions and Features
• Three-phase full-wave current control drive
• PLL speed control
• Internal 24-mode clock divisor switching
• Phase lock detector output
• FG/Hall FG selection
• Current limiter circuit
• 7 V stabilized power supply output pin
• Reverse torque braking
• Crystal oscillator circuit
• Internal/external reference frequency selection
• Built-in FG amplifier and FG pulse output
• Forward/reverse rotation switching
• Low power supply voltage protection circuit
• Thermal protection circuit
Package Dimensions
unit: mm
3147A-DIP28H
[LB1825]
SANYO: DIP28H
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Maximum output current
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VCC max
IO max
Pd max1
Pd max2
Topr
Tstg
Conditions
t < 0.1 s
Independent IC
With an arbitrarily large heat sink
Ratings
30
2.0
3
20
–20 to +80
–55 to +150
Unit
V
A
W
W
°C
°C
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
83097HA (OT)/N3095HA (OT)/91494TH (OT) No. 4845-1/9
1 page  
LB1825
Figure 1 Pin Circuit for Internal Clock Mode
Table 1: External Component Values (reference values)
Crystal (MHz)
3 to 4
4 to 5
5 to 7
7 to 10
C1 (pF)
39
39
39
39
C2 (pF)
82
82
47
27
R (kΩ)
0.82
1.0
1.5
2.0
Use a crystal that has a ratio of at least 1:5 between the fundamental f0 impedance and the 3f0 impedance.
Figure 2 Pin Circuit for External Clock Mode
F/R Switching and Phase Selection
F/R IN1 IN2 IN3
H HL
H LL
H LH
L
L LH
L HH
L HL
H HL
H LL
H
H
L
LH
LH
L HH
L HL
OUT1
M
H
H
M
L
L
M
L
L
M
H
H
OUT2
H
M
L
L
M
H
L
M
H
H
M
L
OUT3
L
L
M
H
H
M
H
H
M
L
L
M
Columns OUT1 to OUT3
H: Source
L: Sink
No. 4845-5/9
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet LB1825.PDF ] | |
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