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PDF LB11981 Data sheet ( Hoja de datos )
| Número de pieza | LB11981 | |
| Descripción | Three-Phase Sensorless Motor Driver | |
| Fabricantes | Sanyo | |
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Ordering number : ENN6656A
Monolithic Digital IC
LB11981
Three-Phase Sensorless Motor Driver
Applications
Refrigerator fan motors
Features
• No Hall sensors required.
• No FG sensors required.
• Lock detection circuit (Can be set to operate in either
automatic recovery or latching mode.)
• Thermal shutdown circuit
• Current limiter circuit
• Low-voltage shutdown circuit
• Forward/reverse switching
• Supports both single- and dual-power supply circuits.
Package Dimensions
unit: mm
3222-HSOP28 (275 mil)
[LB11981]
28 15
1
0.8
2.7
15.2
14
0.3
0.2
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Supply voltage 1
Supply voltage 2
Applied output voltage
Applied input voltage
Maximum output current
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VCC max
VCC max
VO max
VI max
IO max
Pdmax
Topr
Tstg
Conditions
Power supply for output stage
Independent IC
0.8
SANYO: HSOP28 (275 mil)
Ratings
30
30
30
–0.3 to VCC + 0.3
1.0
0.5
–20 to +75
–55 to +150
Unit
V
V
V
V
A
W
°C
°C
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
42001RM (OT) No. 6656-1/7
1 page  
LB11981
Truth Tables
Pin 4 (LAT): Lock detection circuit mode switching
LAT
OPEN
“L”
Mode
Automatic recovery mode
Output latched in the off state when lock detected.
Pin 5 (INFR): Motor rotation direction switching
INFR
OPEN or “L”
“H”
Mode
Forward
Reverse
Pin 3 (LKC): Lock detection time setting capacitor connection
LKC
GND
Capacitor inserted
Mode
Disabled
Enabled
Pin 6 (LKO): Lock state detection signal (A pull-up resistor is required.)
LKO
“H”
“L”
State
Lock not detected
Lock detected
Lock Detection Time Setting (automatic recovery mode)
[LKC pin]
4V
2V
t1 t2 t3
Output off period
Start of lock detection
ILB00050
The following formula gives the time, t1, from the point the motor speed is locked until the output is turned off.
t1[s] = C [µF] × 4 [V] / 1 [µA]
The output off time, t2, is as follows.
t2[s] = C [µF] × 2 [V] / 0.65 [µA]
The time, t3, following the output off state until the motor speed locked state is monitored, is as follows.
t3[s] = C [µF] × 2 [V] / 1 [µA]
When pin 4 (LAT) is low (output off latching mode), after the t1 period lock state monitoring, the output is turned off
and the output is held in the off state until either the VCC or VCCM power supply is switched.
No. 6656-5/7
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet LB11981.PDF ] | |
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