LB1928_08 SANYO [Sanyo Semicon Device], LB1928_08 Datasheet

LB1928_08

Manufacturer Part Number

LB1928_08

Description

For Office Automation Equipment 3-phase Brushless Motor Driver

Manufacturer

SANYO [Sanyo Semicon Device]

Datasheet

1.LB1928_08.pdf (11 pages)

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Ordering number : EN6198C

LB1928

Overview

Features

Specifications

Absolute Maximum Ratings at Ta = 25°C

Maximum supply voltage

Maximum output current

Allowable power dissipation 1

Allowable power dissipation 2

Operating temperature

Storage temperature

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.

• 3-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.

Parameter

"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,

Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to

communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be

intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace

instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety

equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case

of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee

thereof. If you should intend to use our products for applications outside the standard applications of our

customer who is considering such use and/or outside the scope of our intended standard applications, please

consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our

customer shall be solely responsible for the use.

Specifications of any and all SANYO Semiconductor Co.,Ltd. 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

device, the customer should always evaluate and test devices mounted in the customer

equipment.

s products or equipment. To verify symptoms and states that cannot be evaluated in an independent

V CC max

I O max

Pd max 1

Pd max 2

Topr

Tstg

Symbol

Monolithic Digital IC

For Office Automation Equipment

3-phase Brushless Motor Driver

T ≤ 500ms

Independent IC

With an arbitrary large heat sink

Conditions

D0308 MS JM/O0702AS(OT)/D1099TH(KI)/73099RM(KI) No.6198-1/11

Ratings

s products or

-55 to +150

-20 to +80

3.1

Unit

°C

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LB1928_08 Summary of contents

Page 1

Ordering number : EN6198C LB1928 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 ...

Page 2

Allowable Operating Ranges 25°C Parameter Symbol Power supply voltage range Regulator voltage output current I REG LD output current I LD Electrical Characteristics 25° 24V Parameter ...

Page 3

Continued from preceding page. Parameter Symbol Speed discriminator Output High level voltage V OH (D) Output Low level voltage V OL (D) Count number PLL output Output High level voltage V OH (P) Output Low level voltage V OL (P) ...

Page 4

Package Dimensions unit : mm (typ) 3147C Pin Assignment IN3 + OUT1 F OUT2 OUT3 GND2 Relationship between crystal oscillator frequency f OSC and FG frequency follows (servo) ...

Page 5

Block Diagram and Sample Application Circuit OUT LD FG AMP – LOCK DET – + VREG FG RST VREF GND1 ECL 1/512 1/16 Xtal S/S OSC S LB1928 P ...

Page 6

Pin Description Pin No. Pin name 28 OUT1 Motor drive output pins. 1 OUT2 Connect a Schottky diode between these outputs and OUT3 3 GND2 Output ground pin Output block power supply and output ...

Page 7

Continued from preceding page. Pin No. Pin name 11 INT OUT Integrator output pin (speed control pin). 12 INT IN Integrator input pin OUT PLL output pin OUT Speed discriminator output pin. Acceleration : High, Deceleration ...

Page 8

Continued from preceding page. Pin No. Pin name 16 FG OUT FG amplifier output pin amplifier input pin connecting a capacitor (approx. 0.1µF) between and ground, the ...

Page 9

Description of the LB1928 1. Speed control circuit The IC performs speed control through combined use of a speed discrimination circuit and PLL circuit. The speed control circuit counts FG cycles and outputs a deviation signal every 2FG cycles. The ...

Page 10

Since the crystal oscillator circuit operates at high frequencies susceptible to the influence of floating capacitance from the circuit board. Wiring should be kept as short as possible and traces should be kept ...

Page 11

Power supply stabilization Because this IC provides a high output current and uses a switching drive technique, power supply line fluctuations can occur easily. Therefore, a capacitor of sufficient capacitance (several ten µF or higher) must be connected between ...

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