LB1924 Sanyo Semiconductor Corporation, LB1924 Datasheet

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LB1924

Manufacturer Part Number
LB1924
Description
Power Brushless Motor Driver IC for Office Automation Equipment
Manufacturer
Sanyo Semiconductor Corporation
Datasheet

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Ordering number : ENN5687B
Overview
The LB1924 is a direct PWM drive output driver IC
appropriate for the power brushless motors used in office
automation equipment. It includes a speed control circuit,
an FG amplifier, and other peripheral circuits and allows a
drive circuit to be implemented with a single IC. It allows
the number of external components to be reduced by
including a lock protection circuit, a kickback absorption
diode for the lower output side, and other components on
chip.
Functions
• Breakdown voltage: 30 V, output current: 3.1 A
• Direct PWM drive output
• Speed discriminator + PLL speed control technique
• Crystal oscillator circuit
• Built-in FG and integrating amplifiers
• Forward/reverse switching circuit
• Speed lock detection output
• On-chip lower output side kickback absorption diode
• Full complement of built-in protection circuits,
including lock protection, current limiter, and thermal
protection circuits
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
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
Power Brushless Motor Driver IC for Office
Package Dimension
unit: mm
3147B-DIP28H
1.93
R1.7
1
28
1.78
Automation Equipment
20.0
27.0
73099TH (OT)/83097HA(OT) No. 5687-1/11
0.6
[LB1924]
1.0
14
15
Monolithic Digital IC
SANYO: DIP28H
LB1924

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LB1924 Summary of contents

Page 1

... Ordering number : ENN5687B Overview The LB1924 is a direct PWM drive output driver IC appropriate for the power brushless motors used in office automation equipment. It includes a speed control circuit amplifier, and other peripheral circuits and allows a drive circuit to be implemented with a single IC. It allows ...

Page 2

... Output high-level voltage Output low-level voltage Oscillator frequency Amplitude [CROCK Oscillator] Output high-level voltage Output low-level voltage External capacitor charging current Oscillator frequency Amplitude [Current Limiter Operation] Limiter [Thermal Shutdown Operation] Thermal shutdown temperature Hysteresis LB1924 Symbol Conditions V max CC ≥ max ≤ 500 ms I ...

Page 3

... High-level input voltage range Low-level input voltage range Input open voltage Hysteresis High-level input current Low-level input current [Forward/Reverse Pin] Output high-level voltage Output low-level voltage Input open voltage Hysteresis Output high-level voltage Output low-level voltage LB1924 Symbol Conditions V IO(FG) I B(FG –0.2 mA OH(FG) FGO ...

Page 4

... With an arbitrarily large heat sink Independent IC Ambient temperature, Ta – °C Pin Assignment Truth Table Source F Sink IN 1 IN2 OUT2 OUT1 OUT3 OUT1 OUT3 OUT2 OUT1 OUT2 OUT1 OUT3 OUT2 OUT3 L L LB1924 No. 5687-4/11 ...

Page 5

... Equivalent Circuit Block Diagram LB1924 No. 5687-5/11 ...

Page 6

... In this external circuit, the line between the oscillator element and C3 (C2) is particularly subject to floating capacitance problems and requires special care. LB1924 . (This is because a through current will flow at the instant the lower side transistor Sample External Circuit Constants (Reference values) ...

Page 7

... V line to protect against destruction due to accidentally connecting the power supply with the polarity reversed, the power supply line voltage will be even more easily affected and an even larger capacitor will be required. LB1924 pin and ground diode is inserted in the power supply CC ...

Page 8

... The open state functions as a high-level input. Has a hysteresis of about 0.5 V. Low: Forward High or open: Reverse 8 S/S Start/stop control Low 1.5 V High: 3 REG The open state functions as a high-level input. Has a hysteresis of about 0.5 V. Low: Start High or open: Stop LB1924 Equivalent circuit . CC Continued on next page. No. 5687-8/11 ...

Page 9

... XI pin through a series resistor of about 13 kΩ, and leave the XO pin open. 11 INT Integrator amplifier output (speed control output) OUT 12 INT Integrator amplifier input PLL circuit output OUT LB1924 Equivalent circuit PWM comparator Continued on next page. No. 5687-9/11 ...

Page 10

... FG 19 CROCK Setting for the lock protection circuit operating time. An operating time of about 2.5 seconds can be set by connecting a capacitor of about 0.047 µF between the CROCK pin and ground. LB1924 FG Schmitt comparator FG reset circuit + and ground. IN Equivalent circuit Continued on next page ...

Page 11

... 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 July, 1999. Specifications and information herein are subject to change without notice. LB1924 Equivalent circuit and a REG PS No. 5687-11/11 ...

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