SANYO LB1971V Datasheet

Ordering number :ENN6214A

91099RM (OT) No. 6214-1/9

Overview

The LB1971V is a bipolar sensorless motor driver that
provides a reverse torque braking function and is
appropriate for use as the spindle motor driver in CD and
MD players. Since the LB1971V can drive motors without
the use of Hall elements, this device can contribute to
miniaturization, thinner form factors, and lower power
dissipation in end products.

Functions and Features

• Three-phase bipolar sensorless drive

• Soft switching drive technique

• Reverse torque braking

• Standby mode power saving function

• FG outputs

• Can be operated from a 3-V supply.

• Thermal protection circuit

Package Dimensions

unit: mm

3175A-SSOP24

112

13

7.6

8.0

0.5

5.6

0.1

1.6max

1.0

24

0.65

0.22

0.43

0.15

SANYO: SSOP24

[LB1971V]

SANYO Electric Co.,Ltd. Semiconductor Company

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

Monolithic Digital IC

LB1971V

Three-Phase Full-Wave Sensorless CD

and MD Players Spindle Motor Driver

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.

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage 1 V

CC

1max 7.0 V

Maximum supply voltage 2 V

CC

2max 7.0 V

Maximum output circuit supply voltage V

S max

7.0 V

Maximum output current I

O max

700 mA
Allowable power dissipation Pdmax 0.4 W
Operating temperature Topr –20 to +75 °C
Storage temperature Tstg –55 to +150 °C

Specifications

Absolute Maximum Ratings at Ta = 25°C

No. 6214-2/9

LB1971V

Electrical Characteristics at VCC= 3.0 V, VS= 1.5 V, Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Supply voltage 1 V

CC

1 2.0 to 6.0 V

Supply voltage 2 V

CC

2 2.0 to 6.0 V

Output circuit supply voltage V

S

0 to VCC2V

FG pin applied voltage V

FG

0 to 6.0 V

FG pin output current I

FG

2.0 mA

Allowable Operating Ranges at Ta = 25°C

Parameter Symbol Conditions

Ratings

Unit

min typ max

[Current Drain]

Power save mode current drain I

CC

1-1 STBY mode 5µA

Operating current drain I

CC

1-2 IO= 20 mA 3.6 4.6 mA

Pre-drive current I

CC

2IO= 20 mA 0.4 1.0 mA

Current drain + pre-drive current I

CC

1+2 IO= 20 mA 4.0 5.5 mA

[Output Saturation Voltage]

Source 1-1 V

sat

1-1 IO= 0.4 A, VCC1 = VCC2 = V

S

0.90 1.00 V

Source 1-2 V

sat

1-2 IO= 0.2 A, VCC1 = VCC2 = V

S

0.85 0.95 V

Source 2-1 V

sat

2-1 IO= 0.4 A, VCC1 = VCC2 =3V, VS= 1.5 V 0.25 0.35 V

Source 2-2 V

sat

2-2 IO= 0.2 A, VCC1 = VCC2 =3V, VS= 1.5 V 0.15 0.25 V

Sink 1 V

sat

3-1 IO= 0.4 A 0.20 0.35 V

Sink 2 V

sat

3-2 IO= 0.2 A 0.13 0.25 V

[STBY Pin]

High-level input voltage V

SSH

1.4 VCC1V

Low-level input voltage V

SSL

–0.1 0.3 V

High-level input current I

SSH

V

STBY

= 3.0 V 75 µA

Low-level input current I

SSL

V

STBY

= 0 V –10 µA

[BRAKE Pin]

High-level input voltage V

BRKH

1.4 VCC1V

Low-level input voltage V

BRKL

–0.1 0.3 V

High-level input current I

BRKHVBRK

= 3 V 60 µA

Low-level input current I

BRKLVBRK

= 0 V –10 µA

[Startup Oscillator]

High-level output voltage V

OSCH

1.35 1.50 1.65 V

Low-level output voltage V

OSCL

0.50 0.65 0.80 V

[Position Detection Circuit]

Offset voltage V

OFS

Design target value –10 +10 mV

Common-mode input voltage range

V

ICM

0

VCC2 – 1.5

V

[FG Output Pin]

Output saturation voltage V

FGSAT

IFG = 0.4 mA 0.1 0.25 V

[Thermal Protection Circuit]

Operating temperature TSD Design target value 150 180 °C
Hysteresis ∆TSD Design target value 40 °C

[CX Oscillator]

High-level output voltage V

CXH

0.8 1.0 1.2 V

Low-level output voltage V

CXL

0.3 0.5 0.7 V

Oscillator frequency f

CX

C = 470 pF 40 Hz

[SLOPE Circuit]

Charge current I

CHG

1 –6.0 –4.5 –3.0 µA

Discharge current I

CHG

2 3.0 4.5 6.0 µA

No. 6214-3/9

LB1971V

Pin Assignment

LB1971V

1

0

CSLP1

DET

FC

FG

VCC2

VS

VCC1

BRK

STBY

VOUT

UOUT

CSLP2

202122

3

13

14

151617

819

24

WOUT

NC

FCOM

UIN

CX

OSC

VIN

NC

NC

WIN

GND

RF

0. 1

0

120100806040200-20

0. 24

Top view

Pd max — Ta

Allowable power dissipation, Pdmax — W

Ambient temperature, Ta — °C

0. 5

0. 4

2

2 3 4 5 6 7 8 9 1

1

11 12

0. 3

0. 2