Datasheet LB11817 Datasheet (SANYO)

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Page 1

Ordering number :EN*6213A

63099RM (OT) No. 6213-1/10

Overview

The LB11817 is a spindle motor driver for use in slimshaped FDDs that use 5 V power supply.

Functions and Features

• Three-phase full-wave linear drive

• Low saturation voltage

• Built-in digital speed control

• Start/stop circuit (active low)

• Speed switching

• Current limiter

• Index processing circuit

• The index timing can be adjustment with a variable resistor.

• Thermal protection circuit

Package Dimensions

unit: mm

3247-SSOP36

0.8

15.2

0.5

7.6

0.20

0.30

0.8

5.6 1.0

(1.5)

1.8max

0.10

Preliminary

SANYO: SSOP36

[LB11817]

SANYO Electric Co.,Ltd. Semiconductor Company

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

Monolithic Digital IC

LB11817

Three-Phase Full-Wave Linear Drive

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 V

max 7.0 V

Maximum output current I

O max

1t ≤ 0.5 s 1.5 A

Maximum steady-state output current I

O max

2 1.0 A Allowable power dissipation 1 Pdmax1 Independent IC 0.6 W Operating temperature Topr –20 to +80 °C Storage temperature Tstg –40 to +150 °C

Specifications

Absolute Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Supply voltage V

4.2 to 6.5 V

Allowable Operating Ranges at Ta = 25°C

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No. 6213-2/10

LB11817

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

Note: * Items shown to be design target values are not measured.

Parameter Symbol Conditions

Ratings

Unit Note

min typ max

Current drain

CCO

S/S = 5 V (standby mode) 10 µA

S/S = 0 V (normal operation) 17 25 mA

SL bias current I

VSL= 0 V 10 µA

SL low-level input voltage V

SLL

0 1.0 V

SL high-level input voltage V

SLH

3.5 V

S/S bias current I

S/S

150 230 µA

S/S low voltage V

S/SL

0 0.8 V

S/S high voltage V

S/SH

3.5 V

Hall amplifier input bias current I

10 µA

Common-mode input voltage range

1.5

– 1.0

Differential input voltage range V

dif

50 200 mVp-p

Hall bias output voltage V

IH= 5 mA 0.5 0.8 1.1 V

Hall bias leakage current I

HBL

S/S = 5 V ±10 µA

Output saturation voltage V

sat

IO= 0.5 A sink+source 0.45 0.67 V

Output leakage current I

1.0 mA

Current limiter V

lim

0.27 0.3 0.33 V

Control amplifier voltage gain G

–9 –7 –5 dB

Voltage gain inter-phase difference

∆G

±1 dB

V/I conversion source current I

91419µA

V/I conversion sink current I

–

–9 –14 –19 µA

V/I conversion current ratio I

+/I–

0.8 1.0 1.2

DSC buffer input current I

DSC

1.0 µA

FG amplifier voltage gain G

48 dB *

FG offset amplifier input V

FG0

±10 mV *

FG amplifier internal reference voltage

FGB

2.2 2.5 2.8 V FG Schmitt hysteresis ∆Vsh 50 mV * Speed discriminator counts N 1041.5 Discriminator operating frequency

1.1 MHz *

Oscillator frequency range F

OSC

1.1 MHz *

Index output low-level voltage V

IDL

IO= 2 mA 0.4 V

Index output leakage current I

IDL

±10 µA

Index amplifier common-mode

1.0

– 1.0

input voltage range Index input hysteresis ∆V

25 mV Boost voltage VP Ip = –5 mA 1.39 1.55 1.71 V Thermal protection circuit

TSD 150 180 °C *

operating temperature Hysteresis ∆TSD 40 °C *

Page 3

No. 6213-3/10

LB11817

Pin Assignment

LB11817

I-

I+

FG+

FG-

W-

W+

FGO

V-

UU+ NC

NC NC

UOUT VOUT

PGND

WOUT

V+

VCC

GND

CLK

S/S

Top view

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No. 6213-4/10

LB11817

100806040200

-20

0.6

0.8

1.0

1.2

0.2

0.4

Allowable power dissipation, Pdmax (W)

Ambient temperature, Ta (°C)

Independent IC

Pdmax — Ta

Page 5

No. 6213-5/10

LB11817

Truth Table

Source → sink

Hall input

UVW 1V → WHHL 2V → ULHL 3W → ULHH 4W → VLLH 5U → VHLH 6U → WHLL

Index Delay Pulse Timing Chart

HYS

(VVRis the pin voltage)

T1 ≈ 1.363 ms ........... SL = H

T1 ≈ 1.635 ms ........... SL = L

T2 ≈

1.25 × T1

FG+

Page 6

No. 6213-6/10

LB11817

Pin Functions

Pin No. Symbol Pin voltage Function Equivalent circuit

Continued on next page.

• Connection for the external capacitor used to adjust the index timing.

L: 0.4 Vmax H: 4.5 Vmin

• Index output

L: 1.0 Vmax H: 3.5 Vmin

S/S

• Start/stop control. This is an active-low input.

L: 1.0 Vmax H: 3.5 Vmin

VCC

• Speed switching input

L: 0.5 Vmax H: V

– 1.0 Vmin

CLK

2 kΩ

• Reference clock input. The threshold voltage is 1.25 V. At 1 MHz, the LB11817 supports speeds of 300 and 360 rpm.

DO • Speed discriminator

VCC

• Frequency characteristics correction. Oscillation in the current control closedloop circuit can be stopped by inserting a capacitor between this pin and ground.

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No. 6213-7/10

LB11817

Pin No. Symbol Pin voltage Function Equivalent circuit

GND

Continued on next page.

4.2 to 6.5 V

• Supply voltage

This voltage must be stabilized so that ripple and noise do not enter the IC.

+ 1.55 Vtyp

(Ip = –5 mA)

• Boosted voltage output Used as the output transistor pre-driver power supply. This boosted voltage is used when a low saturation output is provided. In all other cases this pin will be at the V

potential.

• Output current detection

An RF resistor inserted between this pin and V

converts the output current to the voltage used for output current detection. The current limiter circuit operates by detecting the voltage on this pin.

12 15

D2 D1

• Connections for the two diodes used by

the voltage boost function.

13 14

17 19 20

B2 B1

OUT

• W-phase output

• V-phase output

• U-phase output

• Boost function switching circuit outputs 1

and 2

Continued from preceding page.

• Ground

This pin and pin 34 must all be connected to the frame ground.

VCC

1413

10Ω

17 19 20

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No. 6213-8/10

LB11817

Pin No. Symbol Pin voltage Function Equivalent circuit

PGND

1.5 Vmin

– 1.0 Vmax

24 25 26 27 28 29

–

• U-phase Hall device inputs

• V-phase Hall device inputs

• W-phase Hall device inputs

0.8 Vtyp

(IH = 5 mA)

• Negative potential that provides Hall

device bias current In the stopped state, this pin is set to the open state to cut off the Hall device bias current.

31 32 33

FGO

FG+ FG–

• FG amplifier output

• FG amplifier minus input

• FG amplifier plus input A 2.5 V reference voltage is generated

internally by the IC.

34 35

I+ I–

Vcc

200 Ω

• Index inputs

• Index timing adjustment voltage input

Continued from preceding page.

• Output transistor ground

Vcc

Vcc 1kΩ

1kΩ

2.5 Vtyp

Vcc

VCC

Vcc

750 kΩ

3 kΩ

26 28

2. 5V

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No. 6213-9/10

LB11817

Block Diagram

Note that the values of the external components shown here are reference values and are not guaranteed to be appropriate in a given application.

3 kΩ

S/S

U+ U-

V+ V-

W+ W-

25 mV

50 mV

CLK

FG+

FG-

FGO

GND

0.1µF

I+ I-

VCC

0.47 µF

0.1

0.10.1µF

µF

100 kΩ

pattern

Control amplifier and current limiter

Timing adjustment

Hall amplifier

Hall bias

Chip select

Matrix

Amplitude control

Reference

voltage

300/360 rpm selection

Divider Speed discriminator

amplifier

(× 250)

Voltage boost circuit

OSC

TSD

Vref

V/I

Page 10

PS No.6213-10/10

LB11817

This catalog provides information as of June, 1999. Specifications and information herein are subject to change without notice.

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.