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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.
Package Dimensions
unit: mm 3163A-SQFP48
[LB1817W]
9.0 7.0 0.5 0.18
36 37 25 24
Functions and Features
* 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
0.75
0.15
9.0 7.0 0.5
0.75
48
13 1 12
0.5
Specifications
Absolute Maximum Ratings at Ta = 25C
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 t 0.5s IC only Ratings 7.0 1.5 1.0 0.45 -20 to +80 -40 to +150 Unit V A A W C C
Allowable Operating Ranges at Ta = 25C
Parameter Power supply voltage Symbol VCC Conditions Ratings 4.2 to 6.5 Unit 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.
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
0.1
0.5
SANYO : SQFP48
1.7max
0.75
LB1817W
Electrical Characteristics at Ta = 25C, 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 S/S = 5V (Standby) S/S = 0V (Normal) VMS1 = 5V 0.0 2 VMS2 = 5V 0.0 2 VMS3 = 5V 0.0 2 0.0 2 2.0 50 * IH = 5 mA S/S = 5V IO = 0.8A RF = 3 k, ROUT = 100 0.5 0.8 0.45 6.3 -7.5 19 -19 0.8 fFG = 300 Hz Open loop* * High -> Low* Low -> High* * * IO = 2 mA 0.2 25 2.9 1.15 0.40 2.20 1.85 150 2 60 2.2 2.5 25 25 1390/2 10 2.8 7.5 -5.5 28 -28 1.0 90 90 min Ratings typ 70 25 180 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 Unit A mA A V V A V V A V V A V V A V mVp-p mV V A V mA mA dB dB A A A mVp-p dB mV V mV mV MHz MHz % V A V mV A V V V V C C
Hysteresis width < 25 mA MS1 = L MS1 = L VTH (MS1 = L) / VTH (MS1 = H)
* *
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
Note: Items shown to be "*" are not measured.
No. 5805-2/9
LB1817W
FGOUT WOUT UIN1 UIN2 WPB
Pin Assignment
NC
UOUT
UPB
VOUT
VPB
NC
36 35 34 33 32 31 30 29 28 27 26 25
NC
24 NC 23 FG- 22 FG
NC 37 VIN2 38 VIN1 39 WIN2 40 WIN1 41 HB 42 VCC 43 AGC 44 DSC 45 CT 46 NC 47 NC 48
1 2 3 4 5 6 7 8 9 10 11 12
+
21 PG 20 Rf
LB1817W
19 NC 18 FC 17 X2 16 X1 15 I
+
14 NC 13 NC
Top view
VREF1
VREF2
SG
NC
NC
MS3
MS2
Block Diagram
LB1817W VCC
UIN1
HU
Hall amplifier U Matrix V W AGC
VCC
MS1
S/S I-
Output amplifier U V W Control amplifier Current limiter VLIM
NC
I/D
RF UPB UOUT VPB VOUT WPB WOUT PGND
UIN2 VIN1
HV HW
VIN2 WIN1 WIN2 AGC
Current control
HB
VCC
Hall bias
S/S
TSD
FC DSC
Buffer amplifier
VREF1
VREF1 Timing adjustment
CT I/D I+ I- FG OUT 750k 12k
N 0.22F
V/I
5A
FG- FG+ X2
Schmitt comparator FG amplifier OSC VREF2
MS1 (1:1.2) H:1.2 L:1 H:360rpm L:300rpm MS2 (1:2) H:2 L:1 MS3
1MHz
Speed discriminator (1390/2 count)
X1 VREF2
1/N
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 Equivalent circuit Pin function * Pins not used
VREF1
2.5V typ
VCC
100
* 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
VCC
* Index pulse output pin.
4
6
SG
* Signal ground pin. Connect to ground together with pin 21. H: 2.0V min L: 0.8V max
7
50k
7
MS3
VCC
* FG switching pin. High: FG set to through Low: FG set to 1-stage division
50k
8
MS2
H: 2.0V min L: 0.8V max
VCC
8
50k
* CLK switching pin. High: Clock set to through Low: Clock set to 1-stage division
50k
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
9
50k 50k 50k 50k
Equivalent circuit
VCC
Pin function * Rotation speed switching pin. High: 360 rpm Low: 300 rpm For details, see rotation speed switching table.
10
S/S
H: 2.0V min L: 0.8V max
200
VCC
* Start/stop switching pin. Low: active
10
11 15
I- I+
I1
VCC
11
200 200
15
* 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.
16
X1
VCC
* Reference clock generator pin.
400
16
200 200
17
X2
VCC
17
200
18
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 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
21
PG
22 23
FG+ FG-
* FG amplifier + pin * FG amplifier - pin
100 200
22
12k 12k VCC
200
23
200
26
FGout
VCC
* FG amplifier output pin.
39 200 1k
26
39
27 28 29 30 32 33
UOUT UPB VOUT VPB WOUT WPB
VCC
28 30 33
27 29 32
21 34 35 38 39 40 41 UIN2 UIN1 VIN2 VIN1 WIN2 WIN1
VCC
* 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.
35 39 41
200
200
34 38 40
Continued on next page No. 5805-6/9
LB1817W
Continued from preceding page Pin number 42 Pin name HB Pin voltage
VCC
Equivalent circuit
42
Pin function * Hall bias negative-side pin. In stop mode, the pin is open and Hall bias is cut off.
43
VCC
44
AGC
VCC
* 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.
100 200
44
45 DSC
VCC
* Speed discriminator pin.
45
200
46
CT
VCC
* Timing adjustment pin. External CR for time constant circuit is connected here.
46
100
No. 5805-7/9
LB1817W
Truth Table
Source -> Sink 1 2 3 4 5 6 V phase -> W phase V phase -> U phase W phase -> U phase W phase -> V phase U phase -> V phase U phase -> W phase VIN1 > VIN2 WIN1 > WIN2 U H L L L H H Hall input V H H H L L L W L L H H H L
Hall input pin High means UIN1 > UIN2
Rotation Speed Select Table
fOSC = 1 MHz MS1 MS2 MS3 fFG [Hz] H H H 720 600 720 L H L L 600 1440 L H H L 1200 360 L H L H 300 L
Pd max - Ta
0.6
Allowable power dissipation, Pd max - W
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 .
(Open-collector)
R CT C
. T = 0.693CR ... MS1 = L . . T = 0.578CR ... MS1 = H .
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

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