SANYO LB1987M, LB1987H, LB1987D, LB1987 Datasheet

Ordering number : ENN6109A

81299RM (OT) No. 6109-1/17

Overview

The LB1987, LB1987D, LB1987M, and LB1987H are
optimal capstan motor drivers for use in VCR sets.

Functions

• Three-phase full-wave current-linear drive

• Torque ripple correction circuit (fixed correction ratio)

• Current limiter circuit with control characteristics gain
switching

• Oversaturation prevention circuits for both the upper and
lower sides of the output stage (No external capacitors
are required.)

• FG amplifier

• Thermal shutdown circuit

Package Dimensions

unit: mm

3240-QFP34H-B

3147B-DIP28H

3129-MFP36S-LF

3233-HSOP28H

1

14

28

15

0.4

0.6

4.04.0

27.0

20.0

R1.7

8.4

1.93 1.78

1.0

12.7

11.2

SANYO: DIP28H

[LB1987D]

0.25

15.3

118

36

19

0.85

0.4

0.8

2.5max

2.250.1

7.9

9.2

10.5

0.65

SANYO: MFP36S-LF

[LB1987M]

6.2

28 15

114

0.8

15.3

2.7

0.3

4.9

1.3

10.5

0.65

0.25

0.85

7.9

2.25

2.5max

0.1

SANYO: HSOP28H

[LB1987H]

34

13.2

10.0

1.0

0.8

16

7

17

1823

24

13.2

10.0

0.8

4.8

1.0

1.6

1.0

2.2

8.4

0.35

1.6

0.1

4.0

0.2

SANYO: QFP34H-B

[LB1987]

LB1987, 1987D, 1987M, 1987H

SANYO Electric Co.,Ltd. Semiconductor Company

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

Three-Phase Brushless Motor Driver

for VCR Capstan Motors

Monolithic Digital IC

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.

No. 6109-2/17

LB1987, 1987D, 1987M, 1987H

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage

V

CC

max 7V

V

S

max 24 V

Maximum output current I

O

max 1.3 A

(LB1987) 0.77 W

Allowable power dissipation Pd max

(LB1987D) 3.0 W
(LB1987M) 0.95 W

(LB1987H) 0.77 W
Operating temperature Topr –20 to +75 °C
Storage temperature Tstg –55 to +150 °C

Specifications

Absolute Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Supply voltage

V

S

5 to 22 V

V

CC

4.5 to 5.5 V

Hall input amplitude V

HALL

Between Hall inputs ±30 to ±80 mVo-p
GSENSE pin input range V

GSENSE

Relative to the control system ground –0.20 to +0.20 V

Allowable Operating Ranges at Ta = 25°C

Parameter Symbol Conditions

Ratings

Unit

min typ max

V

CC

current drain I

CC

RL = ∞, V

CTL

= 0 V (Quiescent) 12 18 mA

[Outputs]

Vosat1

I

O

= 500 mA, Rf = 0.5 Ω, Sink + Source,

2.1 2.6 V

Output saturation voltage

V

CTL

= V

LIM

= 5 V (With saturation prevention)

Vosat2

I

O

= 1.0 A, Rf = 0.5 Ω, Sink + Source,

2.6 3.5 V

V

CTL

= V

LIM

= 5 V (With saturation prevention)

Output leakage current I

O

leak 1.0 mA

[FR]

FR pin input threshold voltage V

FSR

2.25 2.50 2.75 V

FR pin input bias current Ib(FSR) –5.0 µA

[Control]

CTLREF pin voltage V

CREF

2.37 2.50 2.63 V

CTLREF pin input range V

CREF

IN 1.70 3.50 V

CTL pin input bias current Ib(CTL) V

CTL

= 5 V, CTLREF: open 8.0 µA

CTL pin control start voltage V

CTL

(ST)

Rf = 0.5 Ω, V

LIM

= 5 V, IO≥ 10 mA

2.20 2.35 2.50 V

With the Hall input logic states fixed at (U, V, W = H, H, L)

CTL pin control switching voltage V

CTL

(ST2) Rf = 0.5 Ω, V

LIM

= 5 V 3.00 3.15 3.30 V

CTL pin control Gm1 Gm1(CTL)

Rf = 0.5 Ω, ∆I

O

= 200 mA

0.52 0.65 0.78 A/V

With the Hall input logic states fixed at (U, V, W = H, H, L)

CTL pin control Gm2 Gm2(CTL)

Rf = 0.5 Ω, ∆V

CTL

= 200 mV

1.20 1.50 1.80 A/V

With the Hall input logic states fixed at (U, V, W = H, H, L)

[Current Limiter]

LIM current limiter offset voltage Voff(LIM)

Rf = 0.5 Ω, V

CTL

= 5 V, IO≥ 10 mA

140 200 260 mV

With the Hall input logic states fixed at (U, V, W = H, H, L)

LIM pin input bias current Ib(LIM) V

CTL

= 5 V, V

CREF

: open, V

LIM

= 0 V –2.5 µA

LIM pin current limit level I

LIM

Rf = 0.5 Ω, V

CTL

= 5 V, V

LIM

= 2.06 V

830 900 970 mA

With the Hall input logic states fixed at (U, V, W = H, H, L)

[Hall Amplifiers]

Input offset voltage Voff(HALL) –6 +6 mV
Input bias current Ib(HALL) 1.0 3.0 µA
Common-mode input voltage

Vcm(HALL)

1.3 3.3 V

Torque ripple correction ratio TRC

At the bottom and top of the Rf waveform

9%

when IO= 200 mA. (Rf = 0.5 Ω) (Note 1)

[FG Amplifier]

FG amplifier input offset voltage Voff(FG) –8 +8 mV
FG amplifier input bias current Ib(FG) –100 nA
FG amplifier output saturation voltage

Vosat(FG) At the sink side internal pull-up resistor. 0.5 V

FG amplifier common-mode input voltage

VCM(FG) 0.5 4.0 V

Electrical Characteristics at Ta = 25°C, VCC= 5 V, VS= 15 V

Continued on next page.

No. 6109-3/17

LB1987, 1987D, 1987M, 1987H

Continued from preceding page.

Note: * Items marked with an asterisk are design target values and are not measured.

Note: 1. The torque ripple correction ratio is determined from the Rf voltage waveform as shown below.

Parameter Symbol Conditions

Ratings

Unit

min typ max

[Saturation Prevention]

Saturation prevention circuit

Vosat(DET)

IO= 10 mA, Rf = 0.5 Ω,

0.175 0.25 0.325 V

lower side voltage setting V

CTL

= L

VIM

= 5 V,

The voltage between each OUT and Rf.

[Schmitt Amplifier]

Duty ratio DUTY Under the specified conditions 47 50 53 %
Upper side output saturation voltage

Vsatu(SH) 4.8 V

Lower side output saturation voltage

Vsatd(SH) 0.2 V
Hysteresis Vhys 32 50 60 mV
Thermal shutdown operating

T-TSD * 170 °C

temperature

Hall Logic Settings

2 · (Vp – Vb)

Correction ratio = ——————— 100 · (%)

Vp + Vb

Truth Table and Control Functions

Source → sink

Hall input

FR

UVW

1

V → W

HHL

H

W → VL

2

U → W

HLL

H

W → UL

3

U → V

HLH

H

V → UL

4

W → V

LLH

H

V → WL

5

W → U

LHH

H

U → WL

6

V → U

LHL

H

U → VL

Note: 1. The “H” state for FR means a voltage of 2.75 V or higher, and the “L”

state means a voltage of 2.25 V or lower. (When V

CC

= 5 V.)

2. For the Hall inputs, the input “H” state means the state in which the
(+) input for that phase is at least 0.01 V higher than the (–) input for
that phase. Similarly, the “L” state means the state in which the (+)
input for that phase is at least 0.01 V lower than the (–) input for that
phase.

3. Since this drive technique is a 180° power application technique, the
phase that is neither the source phase nor the sink phase does not
turn completely off.

Vp

Vb

123456

GND level

A12204

Pin Function Equivalent circuit diagram

Control and Current Limiting Functions

No. 6109-4/17

LB1987, 1987D, 1987M, 1987H

V

LIM

= 5 V

CTLREF: OPEN

I

OUT

Gm2 = 1.50 A/Vtyp

Gm1 = 0.65 A/Vty

p

V

CTL

2.35 Vtyp 3.15 Vtyp

01

2

345

I

OUT

V

CTL

= 5 V

CTLREF: OPEN

V

LIM

200 mVtyp

01

2

345

Control characteristics Current limiting characteristics

Slope = 0.50 A/V typ

V

LIM

= 5 V

CTLREF: open

Gm2 = 1.50 A/V typ

Gm1 = 0.65 A/V typ

2.35 V typ 3.15 V typ 200 mV typ

(+) inputs (–) inputs

Lower side oversaturation
prevention circuit input
block

OUT for
each phase

V

CTL

= 5 V

CTLREF: open

Pin Functions

U phase Hall element input.
Logic H refers to the state where IN

+

> IN

–

UIN+
U

IN

–

A12207

200 Ω

100 µA

200 Ω

A12208

150 µA

V

CC

Vs

30 kΩ

Rf(POWER)

Rf(SENSE)

200 kΩ

200 Ω

10 µA

V

CC

V phase Hall element input.
Logic H refers to the state where IN

+

> IN

–

VIN+
V

IN

–

W phase Hall element input.
Logic H refers to the state where IN

+

> IN

–

WIN+
W

IN

–

U phase output.
V phase output. (These pins include internal spark killer diodes.)
W phase output.

U

OUT

V

OUT

W

OUT

A12209

200 Ω

200 µA

V

CC

max

LIM

100 µA

200 Ω 200 Ω

CTL

V

CC

V

CC

5 kΩ

5 kΩ

CTLREF

Speed control.
This circuit implements constant current drive based on current feedback
from the Rf pin.
Gm = 0.58 A/V typ at Rf = 0.5 Ω

CTL

Current limiter function control.
The output current can be modified linearly by the voltage on this pin.
Slope = 0.5 A/V typ at Rf = 0.5 Ω

LIM

CTLREF

(LB1987/D)

Output block power supply.

V

S

Rf(POWER)

Rf(SENSE)

Output current detection.
Current feedback is applied to the control block by inserting the resistor Rf
between these pins and ground. Also, both the lower side saturation
prevention circuit and the torque ripple correction circuit operate according to
the voltage on this pin. In particular, since this voltage sets the
oversaturation prevention level, the lower side oversaturation prevention
operation can be degraded if the value of this resistor is set too low.
Note that the PWR pin and the SENSE pin must be connected together.

Continued on next page.

No. 6109-5/17

LB1987, 1987D, 1987M, 1987H

Continued from preceding page.

Pin Function Equivalent circuit diagram

Forward/reverse selection.
The direction (forward or reverse) is selected by the voltage applied to this
pin.
(Vth = 2.5 Vtyp at V

CC

= 5 V)

FR

A12210

200 Ω

FR

200 µA

1/2
V

CC

V

CC

V

CC

V

CC

V

CC

ADJ

10 kΩ

6 kΩ

10 kΩ

500 Ω

6 kΩ

10 kΩ

10 kΩ

20 µA

Input used when the FG amplifier inverting input is used. Connect a
feedback resistor between the FG

OUT

pin and this pin.

FG

IN

–

300 Ω 300 Ω

5 µA

FGin(–) FGin(+)

A12211

10 kΩ

2 kΩ

300 Ω

100 Ω

FGOUT

VCCV

CC

V

CC

10 kΩ

FC

A12212

10 kΩ

5 kΩ

FGS

VCCV

CC

V

CC

A12517

13.2 kΩ

GSENSE

A12518

Non-inverting input used when the FG amplifier is used as a differential input
amplifier.
No bias is applied internally.

FG

IN

+

FG amplifier output.
This pin includes an internal load resistor.

FG

OUT

Speed control loop frequency characteristics correction.FC

Ground for all systems other than the output transistors.
Note that the lowest potential of the output transistors is determined by the
Rf pin.

GND

FG pulse output.
This pin includes an internal load resistor.
(The output impedance is about 3 kΩ.)

FGS

Power supply for all IC internal circuits other than the output block.
This power supply must be stabilized to prevent ripple or other noise from
entering the circuit.

V

CC

Ground sensing.
The influence of the common ground impedance on Rf can be excluded by
connecting this pin to ground near the Rf resistor side of the motor ground
wiring that includes Rf.
(This pin must not be left open.)

GSENSE

External torque ripple correction ratio adjustment.
To adjust the correction ratio, apply the stipulated voltage to the ADJ pin
from a low-impedance external circuit.
If the applied voltage is increased, the correction ratio falls, and if the applied
voltage is lowered, the correction ratio increases.
The range of variation is from 0 to two times the correction ratio when the pin
is left open.
(This pin is set to about V

CC

/2 internally, and has an input impedance of

about 5 kΩ.)

ADJ

Pin Assignment

No. 6109-6/17

LB1987, 1987D, 1987M, 1987H

34

33

32

23

31

30

29

28

27

26

25

24

GND22Vs21FRAME

20

FRAME19V

CC

18

123 456

W

IN

–

FR

GSENSE

RF(SENSE)

W

OUT

V

OUT

U

OUT

RF(PWR)

GND

FRAME

FRAME

FG

IN

–

FG

IN

+

FG

OUT

FGS

CTL

CTLREF

FC

U

IN

+

U

IN

–

V

IN

+

V

IN

–

W

IN

+

LIM

LB1987

Top view

A12217

7

8

9

10

11

12

13

14

15

16

17

Note: The FRAME pins must be connected to ground for ground potential stabilization.

0

0.4

0.2

0.6

0.8

1.0

–20 0 20 40 60 10080

Pd max — Ta

0.77 W

0.46 W

Allowable power dissipation, Pdmax — W

Ambient temperature, Ta — °C