Sanyo LB1851M Specifications

Ordering number:EN3659

Monolithic Digital IC

LB1851M

3-Phase Brushless Motor Driver

Overview

The LB1851M is a 3-phase brushless motor drive IC
ideally suited for use in VCR capstan motor driver, drum

motor driver, and DAT motor driver applications.

Features

• 120˚C voltage linear type.

• Less power dissipation because of speed control based
on motor voltage control (suitable for use in portable
sets).

• Torque ripple compensation circuit on chip.

• Small capacitance of external capacitor because of soft
switching method (clip capacitor).

• Thermal shutdown circuit on chip.

• FG amplifier on chip.

Specifications

Absolute Maximum Ratings at Ta = 25˚C

retemaraPlobmySsnoitidnoCsgnitaRtinU
1egatlovylppusmumixaMV
2egatlovylppusmumixaMV
3egatlovylppusmumixaMV

egatlovylppustuptuOV

tnerruCtuptuOI

noitapissidrewopelbawollAxamdP 0.1W

erutarepmetgnitarepOrpoT 57+ot02–

erutarepmetegarotSgtsT 521+ot55–

xam1 7V

CC

xam2 61V

CC

xam VCC2V

S

xam VSV2+V

O

xam 5.1A

O

Package Dimensions

unit:mm

3073A-MFP30S

[LB1851M]

SANYO : MFP30S

˚C
˚C

Absolute Operating Conditions at Ta = 25˚C

retemaraPlobmySsnoitidnoCsgnitaRtinU

1egatlovylppuSV
2egatlovylppuSV
3egatlovylppuSV

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.

1 0.6ot0.4V

CC

2 41ot4V

CC
S

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquaters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

73098HA (KT)/9050TA (KOTO) No.3659-1/6

Votpu

2V

CC

LB1851M

Electrical Characteristics at Ta = 25˚C, VCC1=5V, VCC2=7V, VS=3V

retemaraPlobmySsnoitidnoC

1tnerrucylppuSI
2tnerrucylppuSI
3tnerrucylppuSI

1tnerrucybdnatstuptuOI
2tnerrucybdnatstuptuOI

egatlovnoitarutastuptuOV

egatlovSRTtuptuOV

egatlovybdnatstuptuOV

egaltovtesffOtupnireifilpmallaHV

egnaregatlovtupnIedom-nommocreifilpmallaHV

niagegatloVtuptuo-tupnillaHG

egatlovlevel-'H'nipekarB 0.2V

egatlovlevel-'L'nipekarB 8.0V

tnerructupninipekarB 001Aµ

tnerrucegakaelnipekarB 03–Aµ

egatlovlevel-'H'nipCRF 8.2V

egatlovlevel-'L'nipCRF 2.1V

tnerructupninipCRF 001Aµ

tnerrucegakaelnipCRF 03–Aµ
egatlovlaudiserreppUV
egatlovlaudiserrewoLV

tniopnoitcelfniegatlovlaudiseR 0.2V

tnuomapalrevOV

egatlovNOybdnatS 2.0–1.0+V

egatlovFFOybdnatS )1eton(ffoybdnats:nepO25V

tnerrucsaibnipybdnatS DNGniP 01Aµ

foerutarepmetgnitarepO

tiucricnwodtuhslamreht

tiucricnwodtuhslamrehtfosiseretsyH 51

]reifilpmAGF[

egatlovtesffotupnireifilpmaGFV

niagegatlovpoolnepOG

egatlovnoitarutastuptuoedisecruoSV

egatlovnoitarutastuptuoediskniSV

noitcejerlangisedom-nommoCRHC 08*Bd

egnaregatlovtupniedom-nommocreilipmaGFV

nigramesahP 02

egatlovdlohserhtreifilpmattimhcSV

siseretsyhreifilpmattimhcSV

1VRBV5=5.45.6Am

CC

2VRBV5=5102Am

CC

V

S

V

QOCC

V

QOS

I

)tas(O

I

)sus(O

IRBV5=4.15.16.1V

QO

tesffoH

MOCH

OHV

I

HX

I

LX

tesffoGF

GFV

I

TUOGF

GFDOIO

HCGF

R,V5=

RB

CC

O

=∞ 5.60.9Am

L

V0=081Aµ

YBTS

R,V0=

YBTS
TUO
TUO

TUO
TUO

zHk1=f06Bd

niGF

niGF

=∞ 051Aµ

L

ecruos+knis,A0.1=3.2V

Am02=61*V

k2.8=elgnaR Ω 5.135.435.73Bd

V,Am001=
V,Am001=

V,V6=2

S

Am2–=7.3V

Am2=3.1V

V,V5.2=+

V5.2=+020406Vm

V,V6=2

CC
CC

V3=060708%

V2=83.055.0V

S

V,V6=2

V2=14.05.0V

S

TUOGF

LotHta254.205.255.2V

nimpytxam

sgnitaR

5–5+*Vm

4.18.2V

051081012

8–8+Vm

05.3V

tinU

˚C*
˚C*

˚C*

Note1 : When standby pin is left open, standby operation is turned to off.
Note2*: Values shown are design targets only. No measurements have been taken. Overlap spec. are regarded as test
specification.

No.3659-2/6

Pin Assignment

LB1851M

Block Diagram

No.3659-3/6

Sample Application Circuit

LB1851M

T ruth T able

edoM

1

2

3

4

5

6

ecruoS

kniS

esahpW → esahpV

esahpV → esahpWH

esahpW → esahpU
esahpU → esahpWH
esahpV → esahpW

esahpW → esahpVH

esahpU → esahpV
esahpV → esahpUH
esahpV → esahpU
esahpU → esahpVH

esahpU → esahpW

esahpW → esahpUH

tupnI

UVW
HHL

HLL

LLH

LHL

HLH

LHH

esreveR/drawroF

lortnoC

L

L

L

L

L

L

Input : “H” : Input 1 of each phase is at a potential which is higher by more than 0.2V relative to input 2.
“L” : Input 1 of each phase is at a potential which is lower by more than 0.2V relative to input 2.

Forward/reverse control : “H” :2.8V to VCC1

“L” : 0V to 1.2V

No.3659-4/6

Pin Description

LB1851M

Unit (resistance : Ω)

Pin No.

4

5

6

7

8

10
11

Symbol Pin voltage Equivalent circuit Pin function

V

S

<V

CC

2

Power supply pin for fixing the output amplitude. Must be lower

2 voltage.

than V

CC

Power supply pin for amp circuit other than motor driver

VCC2

V

1 4V to 6V

CC

4V to 14V

transistor. Power supply pin for supplying voltage to other than
the control section whose supply voltage is V

Power supply pin for supplying voltage to the hall amp, forward
/reverse control, FG amp, thermal shutdown circuit.

When this pin is grounded, all the circuitry stops operating.
In this case, the supply current is approximately 100µA. In the
normal operation mode, this pin is left open or made to be at a
potential of more than 2V.

ST. BY

L : 0.1V max
H : 2.0V min

(When V

CC

1=5V)

The hall input-output gain (slope of motor waveform) can be
changed by changing the resistance connected across this pin
and GND.

ANGLE

FG signal input pin.

–

FG in
FG in

min 0V
max 3.5V

+

(When V

CC

1=5V)

CC

1.

FG

12

FG

13

18

OUT

FRC

19 BR

OUT

1

2

L : 1.2V max
H : 2.8V min

(When V

L : 0.8V max
H : 2.0V min

CC

1=5V)

FG amp output pin.

FG schmitt amp output pin.

Pin for forward/reverse control of motor
L level : Forward (Less than 1.2V : When V
H level : Reverse (More than 2.8V : When V

Pin for stopping the motor
L level : Motor drive (Less than 0.8V).
H level : Motor stop (More than 2.0V).

CC

CC

1=5V)

1=5V).

No.3659-5/6

LB1851M

Continued from preceding page.

Pin No.

14,15
16,17
29,30

Symbol Pin voltage Equivalent circuit Pin function

20
21
22
23
24
25

26

27
28

1,2

Win2
Win1

Vin2

Vin1
Uin2
Uin1

Rf

U

OUT

V

OUT

W

3

OUT

FRAME

(GND)

min 1.4V

max 2.8V

(When V

CC

Unit (resistance : Ω)

W phase hall element input pin Logic "H" : Win1>Win2
V phase hall element input pin Logic " H" : Vin1>Vin2
U phase hall element input pin Logic " H" : Uin1>Uin2

1=5V)

GND for output transistor.
Output pin.

GND for other than output.

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 July, 1998. Specifications and information herein are subject to
change without notice.

PS No.3659-6/6