ETC LB1817W

Ordering number : ENN5805
LB1817W
Monolithic Digital IC
LB1817W
FDD Spindle Motor Driver
Overview
Package Dimensions
The LB1817W is a spindle motor driver for low-profile
floppy disk drives.
unit: mm
3163A-SQFP48
[LB1817W]
Functions and Features
9.0
7.0
0.5
0.18
0.75
• Three-phase full-wave linear drive
(with external PNP transistor)
• Low saturation voltage
• Built-in digital speed control
• 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
0.75
0.15
25
36
37
0.5
9.0
7.0
0.75
24
12
0.1
0.75
1
1.7max
13
48
0.5
0.5
SANYO : SQFP48
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Maximum output current
Maximum constant output current
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VCC max
ICC max1
IO max2
Pd max1
Topr
Tstg
Conditions
Ratings
7.0
1.5
1.0
0.45
–20 to +80
–40 to +150
Unit
V
A
A
W
°C
°C
Ratings
4.2 to 6.5
Unit
V
t ≤ 0.5s
IC only
Allowable Operating Ranges at Ta = 25°C
Parameter
Power supply voltage
Symbol
VCC
Conditions
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
73099RM(KI) No. 5805-1/9
LB1817W
Electrical Characteristics at Ta = 25°C, VCC = 5V
Parameter
Current drain
MS1 bias current
MS1 Low input voltage
MS1 High input voltage
MS2 bias current
MS2 Low input voltage
MS2 High input voltage
MS3 bias current
MS3 Low input voltage
MS3 High input voltage
S/S bias current
S/S Low voltage
S/S High voltage
Hall amplifier input bias current
Common mode input voltage range
Differential input voltage range
Input offset voltage
Hall bias output voltage
Leakage current
Output saturation voltage
Output leakage current
Current limiter
Control amplifier voltage gain
Voltage gain phase differential
V/I conversion source current
V/I conversion sink current
V/I conversion current ratio
DSC buffer input current
FG amplifier input voltage
FG amplifier voltage gain
FG amplifier input offset
FG amplifier internal reference voltage
FG Schmitt hysteresis width
Speed discriminator count
Discriminator operating frequency
Oscillator frequency
Oscillator frequency tolerance
Index output Low voltage
Index output leakage current
Index amplifier common mode input voltage range
Index amplifier differential input voltage range
Index amplifier hysteresis set current
Timing adjustment at High level
Timing adjustment at Low level
Timing adjustment ratio
Reference voltage
Thermal protection operating temperature
Hysteresis width
Symbol
ICCO
ICC
IMS1
VMS1L
VMS1H
IMS2
VMS2L
VMS2H
IMS3
VMS3L
VMS3H
IS/S
VS/SL
VS/SH
IHB
Vh
Vdif
Vho
VH
VHL
V(sat)
IOL
Ilim
GC
∆GC
I+
I–
+ –
I /I
IDSC
VFG
GFG
VFGO
VFGB
∆Vsh1
∆Vsh2
N
FD
FOSC
∆FOSC
VIDL
IIDL
VI
VDIF
IHYS
VTH
VTL
THL
VREF1
VREF2
TSD
∆TSD
Conditions
Ratings
typ
70
25
180
min
S/S = 5V (Standby)
S/S = 0V (Normal)
VMS1 = 5V
0.0
2
VMS2 = 5V
90
0.0
2
VMS3 = 5V
90
0.0
2
0.0
2
2.0
50
*
IH = 5 mA
S/S = 5V
IO = 0.8A
RF = 3 kΩ, ROUT = 100Ω
fFG = 300 Hz
Open loop*
*
0.5
0.45
6.3
–7.5
7.5
–5.5
19
–19
0.8
28
–28
1.0
2
60
2.2
High –> Low*
Low –> High*
*
*
IO = 2 mA
Hysteresis width < 25 mA
MS1 = L
MS1 = L
VTH (MS1 = L) / VTH (MS1 = H)
*
*
0.8
max
100
35
270
0.8
VCC
135
0.8
VCC
135
0.8
VCC
20
0.8
VCC
15
VCC–0.7
200
±10
1.1
±10
0.64
1
8.7
–3.5
±1
37
–37
1.2
1
20
0.2
25
2.9
1.15
0.40
2.20
1.85
150
2.5
25
25
1390/2
±10
2.8
1.1
1.1
±0.2
0.4
±10
VCC–0.7
100
4.2
5.5
1.26
1.35
0.52
0.60
1.148
2.50
2.80
2.15
2.45
180
10
Unit
µA
mA
µA
V
V
µA
V
V
µA
V
V
µA
V
V
µA
V
mVp-p
mV
V
µA
V
mA
mA
dB
dB
µA
µA
µA
mVp-p
dB
mV
V
mV
mV
MHz
MHz
%
V
µA
V
mV
µA
V
V
V
V
°C
°C
Note: Items shown to be “*” are not measured.
No. 5805-2/9
NC
FGOUT
UOUT
UPB
VOUT
VPB
NC
WOUT
WPB
UIN2
NC
Pin Assignment
UIN1
LB1817W
36 35 34 33 32 31 30 29 28 27 26 25
24 NC
NC 37
VIN2 38
23 FG–
VIN1 39
22 FG
WIN2 40
21 PG
WIN1 41
20 Rf
+
HB 42
19 NC
LB1817W
VCC 43
18 FC
AGC 44
17 X2
DSC 45
16 X1
+
3
4
5
6
7
8
9 10 11 12
SG
MS3
MS2
MS1
Top view
NC
2
S/S
I–
1
NC
13 NC
I/D
14 NC
NC 48
VREF2
NC 47
VREF1
15 I
NC
CT 46
Block Diagram
LB1817W
VCC
Current control
HU
VCC
Hall amplifier
U
UIN2
Matrix
UIN1
VIN1
HV
VIN2
WIN1
V
HW
WIN2
W
AGC
Output amplifier
RF
UPB
U
UOUT
VPB
V
VOUT
WPB
WOUT
PGND
W
Control
amplifier
AGC
Current
limiter
VLIM
HB
Hall bias
TSD
S/S
VCC
FC
DSC
Buffer amplifier
VREF1
VREF1
Timing
adjustment
CT
V/I
I/D
I+
I–
5µA
FG OUT
750kΩ
12kΩ
N 0.22µF
FG–
X2
1MHz
Schmitt
comparator
FG+
X1
VREF2
Speed
discriminator
(1390/2 count)
FG amplifier
OSC
1/N
VREF2
(
MS1
(1:1.2)
H:1.2
L:1
H:360rpm
L:300rpm
MS2
(1:2)
H:2
L:1
MS3
SGND
)
No. 5805-3/9
LB1817W
Pin Descriptions
Pin number
1, 5
12, 13
14, 19
24, 25
31, 36
37, 47
48
2
Pin name
NC
Pin voltage
VREF1
2.5V typ
Equivalent circuit
Pin function
• Pins not used
VCC
100Ω
• VREF1 pin.
Used as power supply for external CR
serving for index timing adjustment.
2
3
VREF2
2.15V typ
VCC
• VREF2 pin.
Used as bias pin for external index
sensor.
3
4
I/D
• Index pulse output pin.
VCC
4
6
SG
7
MS3
• Signal ground pin.
Connect to ground together with pin 21.
H: 2.0V min
L: 0.8V max
VCC
7
• FG switching pin.
High: FG set to through
Low: FG set to 1-stage division
50kΩ
50kΩ
8
MS2
H: 2.0V min
L: 0.8V max
VCC
8
• CLK switching pin.
High: Clock set to through
Low: Clock set to 1-stage division
50kΩ
50kΩ
Continued on next page
No. 5805-4/9
LB1817W
Continued from preceding page
Pin number
9
Pin name
MS1
Pin voltage
H: 2.0V min
L: 0.8V max
Equivalent circuit
VCC
9
10
S/S
50kΩ
50kΩ
50kΩ
50kΩ
H: 2.0V min
L: 0.8V max
VCC
Pin function
• Rotation speed switching pin.
High: 360 rpm
Low: 300 rpm
For details, see rotation speed switching
table.
• Start/stop switching pin.
Low: active
200Ω
10
11
15
I–
I+
VCC
I1
15
11
200Ω
16
200Ω
X1
VCC
• External index – input pin.
• External index + input pin.
When I– pin is High, constant current I1
flows. When pin is Low, constant current
I1 is cut off.
Resistor externally connected to I– pin
determines hysteresis width.
• Reference clock generator pin.
400Ω
16
200Ω
17
X2
VCC
17
18
200Ω
200Ω
FC
18
• Frequency characteristics compensation
pin.
To prevent current control loop oscillation,
insert a capacitor between this pin and
VCC.
Continued on next page
No. 5805-5/9
LB1817W
Continued from preceding page
Pin number
20
Pin name
RF
21
PG
22
23
FG+
FG–
Pin voltage
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.
• Output transistor ground pin.
Connect to ground together with pin 6.
2.5V typ
VCC
• FG amplifier + pin
• FG amplifier – pin
100Ω
200Ω
22
200Ω
23
12kΩ
12kΩ
VCC
200Ω
26
FGout
• FG amplifier output pin.
VCC
39Ω
200Ω
27
28
29
30
32
33
UOUT
UPB
VOUT
VPB
WOUT
WPB
26
1kΩ
39Ω
VCC
28
30
33
27
29
32
21
34
35
UIN2
UIN1
38
39
VIN2
VIN1
40
41
WIN2
WIN1
VCC
35
39
41
200Ω
200Ω
34
38
40
• U phase output pin.
• U phase external PNP transistor base
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.
Logic High means UIN1 > UIN2.
• V phase Hall input pin.
Logic High means VIN1 > VIN2.
• W phase Hall input pin.
Logic High means WIN1 > WIN2.
Continued on next page
No. 5805-6/9
LB1817W
Continued from preceding page
Pin number
42
Pin name
HB
Pin voltage
Equivalent circuit
VCC
42
43
VCC
44
AGC
VCC
Pin function
• Hall bias negative-side pin.
In stop mode, the pin is open and Hall
bias is cut off.
• 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.
Controls the Hall amplifier gain according
to Hall input amplitude.
An external capacitor is used.
100Ω
200Ω
44
45
DSC
• Speed discriminator pin.
VCC
45
46
200Ω
CT
VCC
46
• Timing adjustment pin.
External CR for time constant circuit is
connected here.
100Ω
No. 5805-7/9
LB1817W
Truth Table
Source –> Sink
1
2
3
4
5
6
Hall input
V
H
H
H
L
L
L
U
H
L
L
L
H
H
V phase –> W phase
V phase –> U phase
W phase –> U phase
W phase –> V phase
U phase –> V phase
U phase –> W phase
W
L
L
H
H
H
L
Hall input pin High means UIN1 > UIN2
VIN1 > VIN2
WIN1 > WIN2
Rotation Speed Select Table
fOSC = 1 MHz
H
L
H
H
H
720
L
H
L
L
L
600
720
H
H
L
600
1440
L
L
H
1200
360
300
Pd max – Ta
0.6
Allowable power dissipation, Pd max – W
MS1
MS2
MS3
fFG [Hz]
0.5
0.4
0.3
0.28
0.2
0.1
0
–20
0
20
40
60
80
100
Ambient temperature, Ta – °C
No. 5805-8/9
LB1817W
Index and Timing Chart
HYS
I+
1.25V ; MS1 = L
1.08V ; MS1 = H
2.5V
CT
Falling edge
I/D
Output
T
VREF1 =.. 2.5V
R
(Open-collector)
T =.. 0.693CR ... MS1 = L
T =.. 0.578CR ... MS1 = H
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.
PS No. 5805-9/9