Sanyo LB1817W Specifications

Ordering number : ENN5805

LB1817W

Monolithic Digital IC

LB1817W

FDD Spindle Motor Driver

Overview

The LB1817W is a spindle motor driver for low-profile
floppy disk drives.

Functions and Features

• Three-phase full-wave linear drive
(with external PNP transistor)

• Low saturation voltage

• Built-in digital speed control

Package Dimensions

unit: mm

3163A-SQFP48

[LB1817W]

9.0

7.0

0.180.75 0.5

36

37

0.75

7.0

9.0

0.75

25

0.15

24

• Start/stop circuit (Low active)

• Switchable rotation speed

• Current limiter circuit

• Built-in index processing circuit

• Index timing adjustable by VR

• AGC circuit

• Thermal protection circuit

0.5

0.75

48

112

13

0.1

0.5

0.5

SANYO : SQFP48

1.7max

Specifications

Absolute Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit
Maximum supply voltage VCC max 7.0 V
Maximum output current ICC max1 t ≤ 0.5s 1.5 A
Maximum constant output current IO max2 1.0 A
Allowable power dissipation Pd max1 IC only 0.45 W
Operating temperature Topr –20 to +80 °C
Storage temperature Tstg –40 to +150 °C

Allowable Operating Ranges at Ta = 25°C

Parameter Symbol Conditions Ratings Unit
Power supply voltage V

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.

CC

SANYO Electric Co.,Ltd. Semiconductor Company

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

4.2 to 6.5 V

73099RM(KI)

No. 5805-1/9

LB1817W

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

Parameter Symbol Conditions
Current drain I

CCO

I

S/S = 5V (Standby) 70 100 µA
S/S = 0V (Normal) 25 35 mA

CC

MS1 bias current IMS1VMS1 = 5V 180 270 µA
MS1 Low input voltage VMS1L 0.0 0.8 V
MS1 High input voltage VMS1H 2 V
MS2 bias current IMS2VMS2 = 5V 90 135 µA
MS2 Low input voltage VMS2L 0.0 0.8 V
MS2 High input voltage VMS2H 2 V
MS3 bias current IMS3VMS3 = 5V 90 135 µA
MS3 Low input voltage VMS3L 0.0 0.8 V
MS3 High input voltage VMS3H 2 V
S/S bias current I
S/S Low voltage V
S/S High voltage V
Hall amplifier input bias current I

S/S
S/SL
S/SH

HB

Common mode input voltage range Vh 2.0
Differential input voltage range Vdif 50 200 mVp-p
Input offset voltage Vho * ±10 mV
Hall bias output voltage V
Leakage current V

IH = 5 mA 0.5 0.8 1.1 V

H

S/S = 5V ±10 µA

HL

Output saturation voltage V(sat) IO = 0.8A 0.45 0.64 V
Output leakage current I
Current limiter I
Control amplifier voltage gain G
Voltage gain phase differential ∆G
V/I conversion source current I
V/I conversion sink current I
V/I conversion current ratio I+/I
DSC buffer input current I
FG amplifier input voltage V
FG amplifier voltage gain G
FG amplifier input offset V
FG amplifier internal reference voltage

V

OL
lim

DSC

FG

FG
FGO
FGB

C

C

+

–

–

RF = 3 kΩ, R

= 100Ω 6.3 7.5 8.7 mA

OUT

fFG = 300 Hz 2 20 mVp-p
Open loop* 60 dB
* ±10 mV

FG Schmitt hysteresis width ∆Vsh1 High –> Low* 25 mV

∆Vsh2 Low –> High* 25 mV
Speed discriminator count N 1390/2
Discriminator operating frequency F
Oscillator frequency F

OSC

Oscillator frequency tolerance ∆F
Index output Low voltage V
Index output leakage current I
Index amplifier common mode input voltage range
Index amplifier differential input voltage range
Index amplifier hysteresis set current I

V

HYS

Timing adjustment at High level V
Timing adjustment at Low level V
Timing adjustment ratio T
Reference voltage V

Thermal protection operating temperature

REF

V

REF

TSD * 150 180 °C

* 1.1 MHz

D

* 1.1 MHz

OSC
IDLIO

IDL

V

I

DIF

TH

TL

HL

= 2 mA 0.4 V

Hysteresis width < 25 mA 25 100 mV

MS1 = L 1.15 1.26 1.35 V
MS1 = L 0.40 0.52 0.60 V
V

(MS1 = L) / VTH (MS1 = H) 1.148

TH

1 2.20 2.50 2.80 V
2 1.85 2.15 2.45 V

Hysteresis width ∆TSD * 10 °C
Note: Items shown to be “*” are not measured.

Ratings

min typ max

CC

CC

CC

20 µA

0.0 0.8 V
2VCCV

15 µA

VCC–0.7

1mA

–7.5 –5.5 –3.5 dB

±1dB

19 28 37 µA

–19 –28 –37 µA

0.8 1.0 1.2

1 µA

2.2 2.5 2.8 V

±0.2 %

±10 µA

0.2

VCC–0.7

2.9 4.2 5.5 µA

Unit

V

V

V

V

V

No. 5805-2/9

LB1817W

Pin Assignment

Block Diagram

HU

HV

HW

NC
VIN2
VIN1

WIN2
WIN1

HB

V
AGC
DSC

CT
NC
NC

UIN1
U
V
V

W
W

AGC

CC

37
38
39
40
41
42
43
44
45
46
47
48

2

IN

1

IN

2

IN

1

IN

2

IN

UIN134UIN233WPB32W

36NC35

1

2

3

1

NC

REF

V

Hall amplifier

U

V

W

AGC

OUT

LB1817W

4

5NC6SG7

2

I/D

REF

V

Matrix

31NC30

OUT

VPB29V

UPB27U

28

10

MS38MS29MS1

V

CC

Current control

OUT

OUT

G

F

NC

26

25

24
23
22
21
20
19
18
17
16
15
14
13

11

12

–

I

NC

S/S

Output amplifier

U

V

W

Control
amplifier

NC
FG
FG
PG
Rf
NC
FC
X2
X1

+

I
NC
NC

–
+

Top view

R

F

U

PB

U

OUT

V

PB

V

OUT

W

PB

W

OUT

PGND

LB1817W

V

CC

750kΩ

12kΩ

N

0.22µF

1MHz

HB

S/S

1

V

REF

CT
I/D

+

I

–

I
FG OUT

–

FG

+

FG

X2
X1

V

2

REF

Hall bias

V

1

REF

FG amplifier

V

2

REF

TSD

Buffer amplifier

Timing
adjustment

5µA

Schmitt
comparator

1 / NOSC

MS1

(1:1.2)

H:1.2

L:1

H:360rpm

()

L:300rpm

(1:2)

H:2
L:1

MS3MS2

Current

limiter

V

LIM

V/I

Speed
discriminator
(1390/2 count)

SGND

FC

DSC

V

CC

No. 5805-3/9