Datasheet LB1894M Datasheet (SANYO)

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquaters

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.

Monolithic Digital IC

3-Phase Brushless Motor Driver

for CD-ROM Spindle Motors

Ordering number:EN4948A

LB1894M

Overview

The LB1894M is a 3-phase brushless motor driver for
use in CD-ROM spindle motors.

Function and Features

• 3-phase bipolar brushless motor driver.

• Voltage linear drive, enabling the external capacitance
to be reduced.

• Thermal shutdown circuit built-in.

• Overcurrent protection circuit built-in.

• V-type control amplifier built-in.

• 2-step switching control gain.

• Control gain switchable using operational amplifier.

Specifications

Absolute Maximum Ratings at Ta = 25˚C

retemaraPlobmySsnoitidnoCsgnitaRtinU

egatlovylppusmumixaM

tnerrucylppustuptuOV

tnerructuptuOI

noitapissidrewopelbawollAxamdP 50.1W

erutarepmetgnitarepOrpoT 57+ot02–

erutarepmetegarotSgtsT 051+ot55–

V
V

xam1 02V

CC

xam2 0.7V

CC

W,V,UO

TUO

Package Dimensions

unit:mm

3073A-MFP30S

[LB1894M]

SANYO : MFP30S

22V

5.1A

˚C
˚C

Allowable Operating Ranges at Ta = 25˚C

retemaraPlobmySsnoitidnoCsgnitaRtinU

egatlovylppuS

VCC1 81ot5V
VCC2 5.6ot3.4V

93098HA (KT)/70695TH (ID) No.4948–1/7

LB1894M

Electrical Characteristics at Ta = 25˚C, VCC1=12V, VCC2=5V

retemaraPlobmySsnoitidnoC

tnerrucylppuS

]egatsrevirD[

egatlovnoitarutastuptuO

egatlovgnikcolbrotsisnarttuptuOV

egatlovtsertuptuOV

egatlovtesffotupnireifilpmallaHV

tnerrucsaibtupnireifilpmallaHI

edom-nommocreifilpmallaH

egnaregatlovtupni

niagegatlovtuptuo-tupnireifilpmallaHG

]egatslortnoC[

niagevirdtuptuo-lortnoC

ecnereffidlennahctuptuo-lortnoC ∆G

egatlovdlohserhtgnisirlortnoCCV

htdiwegatlovdlohserhtgnisirlortnoC ∆ CV

egatlovlevel-hgihgnihctiwslortnocniaGV

egatlovlevel-wolgnihctiwslortnocniaGV

]sreifilpma-pO[

egatlovtesffotuptnireifilpma-pOV

niagegatlovpool-nepOG

egatlovnoitarutastuptuoecruoSV

egatlovnoitarutastuptuokniSV

noitcejerlangisedom-nommoCRHCeulavngiseD08Bd

nigramesahP φMeulavngiseD02ged

]nwodtuhslamrehT[

erutarepmetgnitareponwodtuhslamrehTDSTeulavngiseD051081012

siseretsyhDST ∆ DSTeulavngiseD51

ICC1CV=CV
ICC2CV=CV

V

1I

)tas(O

V

QO

V

hcH

OHV

G

OCV

G

OCV

HT

HCG
LCG

GFV

egnaregatlovtupniedom-nommocreifilpma-pOV

TUO

2I

)tas(O

TUO

I

)sus(O

TUO

CV=CV

tesffoH

saibH

1hgih=CG,niaghgiH235383Bd
2wol=CG,niagwoL629223Bd

OCV

CV

FER

CV

HT

UOGF
DOGF

HCGF

FER

tesffoGF

zHk1=f06Bd

I

O

IOAm2= 3.1V

CV

FER

=∞ 7103Am

FERR,L
FER

FER

V,V5.2=

TUO

V,V5.2=

TUO

Am2–=7.3V

VotV5.1=

CC

sgnitaR

nimpytxam

5.65.9Am

ecruos+knis,A5.0=6.12.2V
ecruos+knis,A0.1=0.20.3V

eulavngised,Am02=02V

7.50.63.6V
5–5+Vm

15Aµ

3.12.2V
245484Bd

2–2+Bd
p-pV1.0=53.256.2V
p-pV1.0=05051Vm

45V

nepotfelnehwlevelwolerastupnI02+V

8–8+Vm

eulavngised,205.3+V

tinU

˚C
˚C

Pin Assignment

(Top view)

No.4948–2/7

T ruth T able

LB1894M

ecruoS → kniS

1

2

3

4

5

6

esahp-W → esahp-V

esahp-V → esahp-WWOL

esahp-W → esahp-U
esahp-U → esahp-WWOL
esahp-V → esahp-W

esahp-W → esahp-VWOL

esahp-U → esahp-V
esahp-V → esahp-UWOL
esahp-V → esahp-U
esahp-U → esahp-VWOL

esahp-U → esahp-W

esahp-W → esahp-UWOL

U

NI

HGIHHGIHWOL

HGIHWOLWOL

WOLWOLHGIH

WOLHGIHWOL

HGIHWOLHGIH

WOLHGIHHGIH

tupnIllaH

V

W

NI

NI

lortnoC

CV

HGIH

HGIH

HGIH

HGIH

HGIH

HGIH

An input is considered to be HIGH when UIN1 > UIN2, VIN1 > VIN2, and WIN1 > WIN2 by 0.2V more, and is considered
to be LOW when UIN1 > UIN2, VIN1 > VIN2, and WIN1 > WIN2 by 0.2V or less.

No.4948–3/7

Block Diagram 1

LB1894M

Block Diagram 2

No.4948–4/7

Pin Functions

LB1894M

Pin No.

1, 2, 14,

15, 16,
17, 29,

30

3

4

5

Symbol Pin voltage Equivalent circuit Function

FRAME

(GND)

FC

VC

REF

VC

1.5V min
V

2 max

CC

0V min

2 max

V

CC

• Ground connection for all circuit except the outputs.

• Connect a capacitor between this pin and ground to
reduce the control input-output gain frequency
response and to stop the oscillator.

• Speed control pins.
Pin 4 voltage determines the control start voltage.
Pin 5 voltage is used to control the output voltage
(voltage control method).

6

V

1

CC

7

U
8
9

10

11

OUT

V

OUT

W

OUT

R

f

V

2

CC

5 to 18V

4.3 to 6.5V

• Output-stage supply pin.

• Output pins.

• Output transistor ground.
A resistor can be connected between this pin and
GND to sense the output current as a voltage drop to
provide for overcurrent protection.

• Supply for all circuits except the output stage.
This supply should be kept stable to prevent ripple
and noise from sntering this pin.

Continued to next page.

No.4948–5/7

LB1894M

Pin No.

12

13

18

Symbol Pin voltage Equivalent circuit Function

• When the voltage on Rf pin becomes equal to the
voltage on pin 12 (CL), the current limiter operates.
The pin 12 (CL) voltage is determined externally.
If the current limiter is not used, it should be

CC

2

CL

0V min

2 max

V

CC

connected to V

• Control input gain switching pin.
35dB is selected when pin 13 (GC) is HIGH (4 to 5),

GC

0V min

2 max

V

CC

and 29dB is selected when pin 13 (GC) is LOW (0 to
2V) or open for a value V

CC

• A resistor connected between this pin and pin 20
) enables pin 22 switching between HIGH level

(VC

R

OUT

IN

and open to switch the op-amplifier gain.

2=5V.

• Op-amplifier output pin.

This op-amplifier can be used for :

19

VC

OUT

1. Control gain changing, or

2. FG amplifier.

• When this pin goes HIGH, the resistor connected

22

R

IN

between pins 18 and 20 is connected in parallel with
the op-amplifier feedback resistor to switch the gain.

• Op-amplifier inverting input pin.

20

VC

IN

0V min

3.5V max
(V

2=5V)

CC

The op-amplifier non-inverting input is connected to
pin 4 VC

REF

Continued to next page.

No.4948–6/7

LB1894M

Pin No.

23
24

25
26

27
28

Symbol Pin voltage Equivalent circuit Function

W

2

IN

W

1

IN

V

2

IN

V

1

IN

U

2

IN

U

1

IN

1.3V min

2.2V max

• W-phase Hall element input pins.
Logic HIGH is represented by W

• V-phase Hall element input pins.
Logic HIGH is represented by V

• U-phase Hall element input pins.
Logic HIGH is represented by U

IN

IN

IN

1 > V

1 > W

1 > U

2.

IN

2.

IN

2.

IN

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 and all SANYO products described or contained herein fall under strategic
products (including services) controlled under the Foreign Exchange and Foreign Trade Control Law of
Japan, such products must not be exported without obtaining export license from the Ministry of
International Trade and Industry 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 September, 1998. Specifications and information herein are
subject to change without notice.

PS No.4948–7/7