SANYO LB1894M Datasheet
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
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