Datasheet LB1981V Datasheet (SANYO)

Ordering number : ENN5917

LB1981V

Monolithic Digital IC

LB1981V

Three-Phase Brushless Motor Driver

Overview

The LB1981V is a three-phase brushless motor driver
especially suited for use mainly with drum motors of
portable VCRs.

Features

• Three-phase full-wave drive brushless sensorless motor
drive

• Soft switching drive

• Power-saving speed control function due to motor
voltage

• Use with 3V power supply possible

• Output residual voltage can be set in 4 ways

• Forward/reverse switching possible

• Built-in standby function (FG and PG amplifier only
remain operative)

• Built-in braking circuit

• Built-in thermal shutdown circuit

• Built-in FG and PG amplifiers

• Built-in saturation prevention amplifier and midpoint
control circuit

Package Dimensions

unit: mm

3191-SSOP30

[LB1981V]

30

115

9.95

0.22

0.65

16

0.1

0.43

1.0

5.6

1.6max

7.6

0.5

0.15

SANYO : SSOP30

Specifications

Absolute Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Power supply voltage VCC1 max 7 V

VCC2 max 12 V

VS max VCC2V
Applied output voltage VO max VS+2 V
Applied input voltage VIN1 max Control circuits –0.3 to VCC1+0.3 V

VIN2 max U, V, W, COM VS+2 V
Output current IO max 1.0 A
Allowable power dissipation Pd max 0.5 W
Operating temperature Topr –20 to +75 °C
Storage temperature Tstg –55 to +150 °C

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

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

81299RM(KI)

No. 5917-1/9

LB1981V

Allowable Operating Ranges at Ta = 25˚C

Parameter Symbol Conditions Ratings Unit

Power supply voltage VCC1 2.7 to 6.0 V

VCC2 2.7 to 10.0 V

V

S

Electrical Characteristics at Ta = 25°C, VCC1 = 3V, VCC2 = 4.75V, VS = 3V

Parameter Symbol Conditions

Power supply current ICC1IO = 76 mA 5 7.5 mA

ICC2IO = 76 mA 1.2 2.5 mA

Output idle current ICC10Q V

ICC20Q V

I

QV

S30

= 0V 1.0 1.5 mA

STBY

= 0V 10 µA

STBY

= 0V 60 120 µA

STBY

Output saturation voltage, upper side 1 VOU1IO = 0.1A 0.2 0.5 V
Output saturation voltage, lower side 1 VOD1IO = 0.1A 0.2 0.5 V
Output saturation voltage, upper side 2 VOU2IO = 0.4A 0.4 0.8 V
Output saturation voltage, lower side 2 VOD2IO = 0.4A 0.4 0.8 V
COM pin common mode input voltage V

IC

range
Standby pin High level voltage V
Standby pin Low level voltage V
Standby pin input current I
Standby pin leakage current I
FRC pin High level voltage V
FRC pin Low level voltage V
FRC pin input current I
FRC pin leakage current I
Slope pin source current ratio R
Slope pin sink current ratio R
CSLP1 source - sink current ratio R
CSLP2 sink - source current ratio R
Startup frequency Freq C

STBYH

STBYL
STBYHVSTBY
STBYLVSTBY

FRCH
FRCL
FRCI

FRCL

SOURCEICSLP

SINKICSLP
CSLP
CSLP

V

FRC

V

FRC

1I

CSLP

2I

CSLP

OSC

= 3V 50 µA
= 0V –10 µA

= 3V 50 µA
= 0V –10 µA

1 source/I
1 sink/I
1 source/I
2 source/I

2 source –12 +12 %

CSLP

2 sink –12 +12 %

CSLP

1 sink –35 +15 %

CSLP

2 sink –35 +15 %

CSLP

= 0.1 µF, OSC frequency *1 11.5 Hz
Phase delay width Dwidth *1 30 deg
Thermal shutdown operating T

TSD

*1 150 180 210 ˚C
temperature
Thermal shutdown hysteresis ∆T
SELCSLP pin High level voltage V
SELCSLP pin Low level voltage V
SELCSLP input current I
SELCSLP pin leakage current I

SEL

SEL

SEL

SEL

*1 15 °C

TSD

H2V

L –0.2 +0.7 V

HV

SELCSLP

LV

SELCSLP

= 3V 50 µA

= 0V –10 µA
[FG amplifier]
Input offset voltage V
Input bias current I
Common mode input voltage range V
Open loop gain G
Input ON voltage V
Input OFF voltage V
Schmitt amplifier hysteresis width V

BIN
ICOM

SHIS

*1 ±1 ±5mV

IO

–

*1 1 2 V
f = 1 kHz *1 55 dB

VFG

OLIO

OHIO

= 10 µA 0.4 V
= 10 µA

*1 20 mV
Output duty Duty f = 720 Hz, VIN = 20 mVp-p 30 70 %
Reference voltage V

REF

[PG amplifier]
Input offset voltage V
Input bias voltage I
Common mode input voltage range V
Open loop gain G
Output ON voltage V
Output OFF voltage V
Schmitt amplifier hysteresis width V

BIN
ICOM

SHIS

*1 ±1 ±5mV

IO

–

*1 250 nA

*1 1 2 V

f = 1 kHz *1 55 dB

VPG

IO = 10 µA 0.4 V

OL
OHIO

= 10 µA

*1 50 mV

Note: Items shown to be “*1” are not measured.

min typ max

0.3

2V

–0.2 +0.7 V

2V

–0.2 +0.7 V

VCC1–0.5

1.15 1.30 1.45 V

VCC1–0.5

0 to VCC2V

Ratings

VCC2–0.9

CC

CC

CC

250 nA

Unit

1V

1V

No. 5917-2/9

V

V

V

V

Pin Assignment

LB1981V

U

OUT

V

OUT

STBY

SELCSLP

FRC

V

VCC2

VCC1

CSLP1

CSLP2

PG

OUT

PGC

1

2

3

4

5

6

S

7

8

9

10

11

12

LB1981V

30

29

28

27

26

25

24

23

22

21

20

19

RF

W

OUT

COM

V

IN

U

IN

W

IN

GND

BFGO

FC2

FILTER

FC1

OSC

0.6

0.5

0.4

0.3

0.2

PG

V

REF

FG

Pdmax

13

IN

14

15

IN

18

17

16

FG

OUT

FGIN2

FGIN1

Top view

A10857

-

Ta

0.1

Allowable power dissipation, Pd max – W

0

–20

020406080100

Ambient temperature, Ta – ˚C

No. 5917-3/9

Pin Descriptions

3

Pin name

STBY

Pin number

Pin voltage

VCC1 max

–0.2V min

3

LB1981V

Equivalent circuit

100kΩ

100kΩ

VCC1

Pin function
When this pin is at 0.7V or
less or when it is open, only
the FG/PG amplifier operates.
In the motor drive state, the
pin should be at 2V or higher.

A10858

4

5

6

7

8

9

10

SEL CSLP

FRC

V

S

VCC2

VCC1

CLSP1

CLSP2

VCC1 max

–0.2V min

VCC1 max

–0.2V min

0V to VCC2

2.7V to 10V

2.7V to 6V

VCC1

CSLP pin charge/discharge
current switching pin.
Setting this pin to 2V or higher
switches the triangular wave

4

100kΩ

100kΩ

A10859

VCC1

20µA

slope that determines soft
switching.

Motor forward/reverse
switching pin.
Low: reverse

50kΩ

5

50kΩ

(–0.2V to +0.7V or open)

High: forward
(2V to VCC1)

A10860

Power supply pin for
determining output amplitude
by supplying motor voltage.
Must be lower than VCC2
voltage.
Power supply pin for supplying
source side predriver voltage
and coil waveform detect
comparator voltage.
Power supply pin for circuits
except motor voltage, source
side predriver voltage, and coil
waveform detect comparator
voltage.

VCC1

Pins for connecting triangular
wave oscillator capacitor. This

4µA20µA8µA

triangular wave coil output
performs waveform soft
switching.

1kΩ

9 10

A10861

Continued on next page

No. 5917-4/9

Continued from preceding page

Pin number

Pin name

11

PG

Pin voltage

OUT

VCC1

LB1981V

Equivalent circuit Pin function

PG amplifier output pin.

30µA

30kΩ

11

A10862

12

13

14

PGC

PGIN

V

REF

2.0V max

1.0V min

(VCC = 3V)

PG amplifier peak hold
capacitor connection pin.

6µA

VCC1

75kΩ1.5kΩ

10µA

10µA

200Ω

12

A10863

PG amplifier input pin.

100kΩ

13

500Ω 500Ω

6µA

VCC1

1.3V

VCC1

A10864

Connect PG coil between this
pin and V

REF

.

Internal 1.3V reference
voltage.
Used as reference voltage for
FG and PG amplifiers.

14

1.3V

15

16

17

FG

IN

FGIN1

FGIN2

2.0V max

1.0V min

(VCC1 = 3V)

1.3V

10kΩ

VCC1

35kΩ

6µA

70kΩ

200Ω 9kΩ 1kΩ

17

16 15

A10865

A10866

FG amplifier input pin.
Connect FG coil between this
pin and V

REF

.

FG amplifier input signal noise
filter capacitor connection pin.

FG amplifier input signal noise
filter capacitor pin.

Continued on next page

No. 5917-5/9

Continued from preceding page

Pin number

18

Pin name

PG

OUT

Pin voltage Equivalent circuit

LB1981V

Pin function
FG amplifier output pin.

VCC1

30µA 30kΩ

18

A10867

19

20

22

OSC

FC1

FC2

5µA 2.5µA10µA

1kΩ

19

VCC1

2kΩ

2kΩ

2s

5kΩ 10kΩ

10kΩ

20

VCC1

22

FC2

VCC1

A10868

A10869

Pin for connecting triangular
wave oscillator capacitor.
Serves for forced startup
waveform generation.

Frequency characteristics pin.
Connecting a capacitor
between this pin and ground
serves to prevent closed-loop
oscillation in the current
control circuitry.
(Lower-side output transistor
drive current)

Frequency characteristics pin.
Connecting a capacitor
between this pin and ground
serves to prevent closed-loop
oscillation in the current
control circuitry.
(Lower-side output transistor
drive current)

21

FILTER

1kΩ

VCC1

A10870

Connecting a capacitor

25µA

between this pin and ground
activates the coil output
saturation prevention function.

30kΩ 1kΩ

In this condition, the VS pin is
controlled for motor voltage
control.

1kΩ

1kΩ

1

29

212

A10871

By adjusting the external
capacitor, torque ripple
compensation can be varied.

Continued on next page

No. 5917-6/9

Continued from preceding page

Pin number

23

Pin name

BFG0

Pin voltage Equivalent circuit

LB1981V

50µA50µA

30kΩ

VCC1

23

A10872

Pin function
Motor counterelectromotive
voltage FG pulse pin.
Outputs a pulse using W
phase counterelectromotive
voltage as FG.
Connect to ground if not used.

24

25

26

27

28

29

GND

Ground for all circuits except
output.

W

IN

Coil waveform detect
comparator input pins.

U

IN

V

IN

COM

VCC2

25

27

2kΩ

200Ω

10µA

200Ω

200Ω

2826

Motor coil midpoint input pin.
Using this voltage as a
reference, the coil voltage

A10873

W

OUT

1

2

U

V

OUT

OUT

3.9Ω

29 1 2

V

S

waveform is detected.

W phase coil output pin.

U phase coil output pin.

V phase coil output pin.

30

RF

3.9Ω

VCC1

30

A10874

Output transistor ground.
Constant current drive is
performed by detecting the
voltage at this pin.

No. 5917-7/9

LB1981V

+

–

+

–

+

–

+

–

–

+

–

+

+

–

V

CC1

FC2

BFG

STBY

OSC

FRC

CSLP1

CSLP2

SELCSLP

FC1

FILTER

FG

OUT

FG

IN2

FG

IN1

FG

IN

V

REF

PG

IN

PGC PG

OUT

GND

RF

W

OUT

V

OUT

U

OUT

V

S

W

IN

V

IN

U

IN

COM

V

CC2

0.1µF

0.1µF

0.1µF

30kΩ

200Ω

200Ω

50kΩ 10kΩ

V

CC1

30kΩ

200Ω

200Ω 9kΩ 1kΩ

500Ω

100kΩ

500Ω

200Ω

1.5kΩ 75kΩ 200Ω

200Ω

V

CC1

30kΩ

V

CC1

Thermal shutdown circuit

Startup control

circuit

Timing control

circuit

Forward/reverse

Rotor position detect circuit

Soft switching

drive circuit

Midpoint control

Output drive circuit

A10875

Reference voltage

1MΩ 1µF

0.25Ω

30kΩ 30kΩ 30kΩ

Block Diagram (Constants for external components depend on motor.)

No. 5917-8/9

LB1981V

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 or all SANYO products(including technical data,services) described or
contained herein are controlled under any of applicable local export control laws and regulations,
such products must not be exported without obtaining the export license from the authorities
concerned 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 August, 1999. Specifications and information herein are subject to change
without notice.

PS

No. 5917-9/9