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PDF LB1928 Data sheet ( Hoja de datos )
| Número de pieza | LB1928 | |
| Descripción | Three-Phase Brushless Motor Driver | |
| Fabricantes | Sanyo Semicon Device | |
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Ordering number : ENN6198A
LB1928
Monolithic Digital IC
LB1928
Three-Phase Brushless Motor Driver
for Office Automation Equipment
Overview
The LB1928 is a 3-phase brushless motor driver well suited
for drum and paper feed motors in laser printers, plain-paper
copiers and other office automation equipment. Direct PWM
drive allows control with low power losses. Peripheral
circuitry including speed control circuit and FG amplifier is
integrated, thus allows drive circuit to be constructed with a
single chip.
Package Dimensions
unit: mm
3147B-DIP28H
[LB1928]
28 15
R1.7
Functions and Features
• Three-phase bipolar drive (30V, 3.1A)
• Direct PWM drive technique
• Built-in diode for absorbing output lower-side kickback
• Speed discriminator and PLL speed control
• Speed lock detection output
• Built-in forward/reverse switching circuit
• Built-in protection circuitry includes current limiter,
overheat protection, motor restraint protection, etc.
1 20.0 14
27.0
1.93 1.78
0.6 1.0
SANYO : DIP28H
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Maximum output current
Allowable power dissipation 1
Allowable power dissipation 2
Operating temperature
Storage temperature
Symbol
Vcc max
IO max
Pd max 1
Pd max 2
Topr
Tstg
Conditions
T ≤ 500 ms
IC only
With an arbitrary large heat sink
Allowable Operating Ranges at Ta = 25°C
Parameter
Symbol
Power supply voltage range 1
Vcc
Regulator voltage output current
LD output current
IREG
ILD
Conditions
Ratings
30
3.1
3
20
–20 to +80
–55 to +150
Unit
V
A
W
W
°C
°C
Ratings
9.5 to 28
0 to –20
0 to 15
Unit
V
mA
mA
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
D1099TH(KI)/73099RM(KI) No. 6198-1/11
1 page  
Equivalent Circuit Block Diagram
LB1928
No. 6198-5/11
5 Page 
LB1928
10. Motor restraint protection circuit
To protect the IC and the motor itself when rotation is inhibited, a restraint protection circuit is provided. If the LD
output is High (unlocked) for a certain interval in the start condition, the lower-side transistors are turned off. The
length of the interval is determined by the capacitance at the CSD pin. A capacitance of 10 µF results in a set
interval of about 3.3 seconds. (Tolerance approx. ±30%)
Set interval (s) =.. 0.33 × C (µF)
If the capacitor arrangement is subject to leak current, possible adverse effects such as setting time tolerances must
be taken into consideration.
When the restraint protection circuit has been activated, the condition can only be canceled by setting the system to
the stop condition or by turning the power off and on again (in the stop condition). When wishing not to use the
restraint protection circuit, connect the CSD pin to ground.
If the stop time when releasing the restraint protection is short, the capacitor charge will not be fully dissipated.
This in turn will cause a shorter restraint protection activation time after the motor has been restarted. The stop time
should therefore be designed to be sufficiently long, using the equation shown below (also when restarting in the
motor start transient state).
Stop time (ms) ≥ 15 × C (µF)
11. Power supply regulation
Because this IC has a high output current, power supply line fluctuations can occur easily. Therefore a capacitor of
sufficient capacitance must be connected between the VCC pin and ground to assure stable operation. If a diode is
used in the power line for reverse-connection protection, the likelihood of power line fluctuations increases further,
which will require more capacitance.
Specifications of any and all SANYO products described or contained herein stipulate the performance,
characteristics, and functions of the described products in the independent state, and are not guarantees
of the performance, characteristics, and functions of the described products as mounted in the customer's
products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,
the customer should always evaluate and test devices mounted in the customer's products or equipment.
SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or that could cause damage to other property. When designing equipment, adopt safety measures so
that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective
circuits and error prevention circuits for safe design, redundant design, and structural design.
In the event that any or all SANYO products(including technical data,services) described or
contained herein are controlled under any of applicable local export control laws and regulations,
such products must not be exported without obtaining the export license from the authorities
concerned in accordance with the above law.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system,
or otherwise, without the prior written permission of SANYO Electric Co., Ltd.
Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification"
for the SANYO product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only ; it is not
guaranteed for volume production. SANYO believes information herein is accurate and reliable, but
no guarantees are made or implied regarding its use or any infringements of intellectual property rights
or other rights of third parties.
This catalog provides information as of December, 1999. Specifications and information herein are subject to change
without notice.
PS No. 6198-11/11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet LB1928.PDF ] | |
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