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

Pin Descriptions

Pin number

1, 5
12, 13
14, 19
24, 25
31, 36
37, 47
48

2

3

Pin name

NC

V

REF

V

REF

1

2

Pin voltage

2.5V typ

2.15V typ

100Ω

LB1817W

Equivalent circuit

Pin function

• Pins not used

•V

1 pin.

V

CC

REF

Used as power supply for external CR
serving for index timing adjustment.

2

•V

2 pin.

V

CC

REF

Used as bias pin for external index
sensor.

3

4

I/D

V

CC

• Index pulse output pin.

4

6

SG

• Signal ground pin.
Connect to ground together with pin 21.

7

MS3

H: 2.0V min

L: 0.8V max

7

50kΩ

50kΩ

8

MS2

H: 2.0V min

L: 0.8V max

8

50kΩ

50kΩ

• FG switching pin.

V

CC

High: FG set to through
Low: FG set to 1-stage division

• CLK switching pin.

V

CC

High: Clock set to through
Low: Clock set to 1-stage division

Continued on next page

No. 5805-4/9

Continued from preceding page

Pin number

9

Pin name

MS1

Pin voltage

H: 2.0V min

L: 0.8V max

LB1817W

Equivalent circuit Pin function

• Rotation speed switching pin.

V

CC

9

50kΩ

50kΩ

50kΩ

50kΩ

High: 360 rpm
Low: 300 rpm
For details, see rotation speed switching
table.

10

11
15

16

S/S

I
I

X1

–
+

H: 2.0V min

L: 0.8V max

11

16

200Ω

I

1

200Ω200Ω

400Ω

200Ω 200Ω

10

• Start/stop switching pin.

V

CC

Low: active

• External index – input pin.

V

CC

• External index + input pin.
When I– pin is High, constant current I1
flows. When pin is Low, constant current

15

I1 is cut off.
Resistor externally connected to I– pin
determines hysteresis width.

• Reference clock generator pin.

V

CC

17

18

X2

FC

17

200Ω

18

V

CC

• Frequency characteristics compensation
pin.
T o prevent current control loop oscillation,
insert a capacitor between this pin and
VCC.

Continued on next page

No. 5805-5/9

Continued from preceding page

Pin number

20

Pin name

RF

Pin voltage

LB1817W

Equivalent circuit Pin function

• Output current detection pin.
To detect output current as a voltage,
insert a resistor Rf between this pin and
VCC. The voltage is used for the current
limiter. The detection level is about 1/50
of the output current.

21

22
23

26

PG

FG
FG

FGout

• Output transistor ground pin.
Connect to ground together with pin 6.

+
–

2.5V typ

12kΩ
12kΩ

100Ω

200Ω

200Ω

1kΩ200Ω

39Ω

39Ω

200Ω

V

CC

• FG amplifier + pin

V

CC

• FG amplifier – pin

2322

• FG amplifier output pin.

V

CC

26

27
28
29
30
32
33

34
35

38
39

40
41

U

OUT

U

V

OUT

V

W

OUT

W

UIN2
UIN1

VIN2
VIN1

WIN2
WIN1

PB

PB

PB

V

CC

35

200Ω 200Ω

39
41

28
30
33

21

• U phase output pin.

• U phase external PNP transistor base

27
29
32

connection.

• V phase output pin.

• V phase external PNP transistor base
connection.

• W phase output pin.

• W phase external PNP transistor base
connection.

• U phase Hall input pin.

V

CC

Logic High means UIN1 > UIN2.

• V phase Hall input pin.
Logic High means VIN1 > VIN2.

• W phase Hall input pin.

34

Logic High means WIN1 > WIN2.

38
40

Continued on next page

No. 5805-6/9

Continued from preceding page

Pin number

42

Pin name

HB

Pin voltage

LB1817W

Equivalent circuit Pin function

V

CC

• Hall bias negative-side pin.
In stop mode, the pin is open and Hall

42

bias is cut off.

43

44

45

46

V

CC

AGC

DSC

CT

46

45

100Ω

44

200Ω

200Ω

100Ω

• Power supply pin.
The voltage supplied to this pin must be
stabilized to prevent ripple noise or other
noises from inputting to this pin.

• AGC pin.

V

CC

Controls the Hall amplifier gain according
to Hall input amplitude.
An external capacitor is used.

• Speed discriminator pin.

V

CC

• Timing adjustment pin.

V

CC

External CR for time constant circuit is
connected here.

No. 5805-7/9

LB1817W

Truth Table

Source –> Sink

1 V phase –> W phase H H L
2 V phase –> U phase L H L
3 W phase –> U phase L H H
4 W phase –> V phase L L H
5 U phase –> V phase H L H
6 U phase –> W phase H L L

Hall input pin High means UIN1 > UIN2

VIN1 > VIN2
WIN1 > WIN2

UVW

Rotation Speed Select Table

f
MS1 HLHLHLHL
MS2 H L H L
MS3 H L L H

fFG [Hz] 720 600 720 600 1440 1200 360 300

OSC

= 1 MHz

Hall input

Pd max – Ta

0.6

0.5

0.4

0.3

0.2

0.1

Allowable power dissipation, Pd max – W

0

–20 0 20 40 60 80 100

Ambient temperature, Ta – °C

0.28

No. 5805-8/9

Index and Timing Chart

LB1817W

HYS

1.25V ; MS1 = L

1.08V ; MS1 = H

+

I

2.5V
CT

Falling edge

I/D

T

.

V

1 = 2.5V

REF

.

R

.

T = 0.693CR

.
.

T = 0.578CR

.

...
...

(Open-collector)

MS1 = L
MS1 = H

Output

CT

C

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 July, 1999. Specifications and information herein are subject to change
without notice.

No. 5805-9/9

PS