Datasheet LB1997 Datasheet (SANYO)

Ordering number : EN5978A

LB1997

Monolithic Digital IC

LB1997

Three-Phase Brushless Motor Driver

for CD-ROM Spindle Drive

Overview

The LB1997 is a three-phase brushless motor driver especially suited for CD-ROM spindle motor drives.

Functions

• Current linear drive

• Control V type amplifier

• Separate power supply for output upper side bias circuit allows low output saturation by boosting this power supply only (useful for 5V power supply types).

• Upper side current detection technique reduces loss voltage of current detection resistor. Voltage effect of this resistor reduces internal current drain of IC.

• Built-in short braking circuit

• Built-in reverse blocking circuit

• Hall FG output

• Built-in S/S function

• Built-in current limiter circuit

• Built-in Hall power supply

• Built-in thermal shutdown circuit

• V type control/single-side control switching pin allows CLV and CAV operation.

Package Dimensions

unit: mm

3222-HSOP28

[LB1997]

114

0.8

2.0

1.6

With substrate

1.2

2.7

15.2

Pd max – Ta

0.3

1.5

1528

0.8

1.0

5.6

0.5

0.2

1.8max

0.1

SANYO : HSOP28

7.6

0.8

IC only

0.4

Allowable power dissipation, Pd max – W

0

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.

0–20 20 40 60 75 80 100

Ambient temperature, Ta – °C

0.6

SANYO Electric Co.,Ltd. Semiconductor Company

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

60499RM(KI)/22699RM(KI)

No. 5978-1/9

LB1997

Specifications

Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Power supply voltage 7.0 V

Applied output voltage 14.4 V Applied intput voltage V Output current 1.3 A Allowable power dissipation Pd max IC only 0.6 W

Operating temperature Topr –20 to +75 °C Storage temperature Tstg –55 to +150 °C

Operating Conditions at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Power supply voltage 4 to 6 V

VCC1 max VCC2 max

VCC3 max

VO max

VIN max

IO max

VCC1 VCC2 VCC3

with substrate (114.3 × 76.1 × 1.6 mm3, glass exposy)

≥ VCC1

14.4 V

VCC1

1.5 W

4 to 13.6 V 4 to 13.6 V

Sample Application at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

12V type Regulated voltage 4 to 6 V

5V type Regulated voltage 4 to 6 V

Note: When boost-up voltage is used at VCC2, output can be set to low-saturation.

VCC1

VCC2 = VCC3

1 = VCC3

V

CC

2

V

CC

Unregulated voltage 4 to 13.6 V

Boost-up voltage or regulated voltage (Note)

4 to 13.6 V

No. 5978-2/9

LB1997

Electrical Characteristics at Ta = 25°C, VCC1 = 5V, VCC2 = VCC3 = 12V

Parameter Symbol

[Power supply current] Power supply current 8 mA

Output idle current 200 µA

[Output] Saturation voltage, upper side 1 V lower side 1 0.3 V Saturation voltage, upper side 2 0.3 V lower side 2 0.3 V Current limiter setting voltage 0.37 V [Hall amplifier] Common mode input voltage range 1.2 V Input bias current 1 µA Minimum Hall input level 60 [S/S pin] High level voltage 2.0 V Low level voltage 0.7 V Input current 200 µA Leak current –30 µA [Control]

Voltage gain 0.25 times Startup voltage 2.35 2.65 V Startup voltage width 50 150 mV [Hall power supply] Hall power supply voltage 0.8 V Allowable current 20 mA [Thermal shutdown] Operating temperature Design target value 150 180 210 °C Hysterisis Design target value 15 °C [Short braking] Brake pin at High level 4 5 V Brake pin at Low level 0 1 V [Control switching] CC pin at High level 4 5 V CC pin at Low level 0 1 V

ICC1 ICC2 ICC3

ICC1OQ ICC2OQ ICC3OQ

VOU1 VOD1 VOU2 VOD2

V

CL

V

HCOM

I

HIB

V

HIN

S/SH

V

S/SL

I

S/SI

I

S/SL

I

VC

I

VCREF

GV

CO

V

CTH

∆V

CTH

V

H

I

H

T

TSD

∆T

TSD

V

BRH

V

BRL

V

CCH

V

CCL

VC = V

CREF

VC = V

CREF

VC = V

CREF

V

= 0V

S/S

V

= 0V

S/S

30 µA

V

= 0V

S/S

IO = –0.5A, VCC1 = 5V, VCC2 = VCC3 = 12V IO = 0.5A, VCC1 = 5V, VCC2 = VCC3 = 12V

IO = –0.5A, VCC1 = VCC3 = 5V, VCC2 = 12V IO = 0.5A, VCC1 = VCC3 = 5V, VCC2 = 12V RRF = 0.43Ω

V

= 5V

S/S

V

= 0V

S/S

VC = V

CREF

VC = V

CREF

∆VRF/∆V V

= 2.5V

CREF

V

= 2.5V

CREF

IH = 5mA

Conditions

= 2.5V = 2.5V

C

Note:

• During S/S OFF (standby), the Hall comparator is at High.

• Design target values are not measured.

Ratings

min typ max

0 mA

150 250 µA

1.0

VCC–1.0

VCC1V

1 µA 1 µA

Unit

30 µA

mV

P-P

No. 5978-3/9

Truth Table

Source –> Sink

1

2

3

4

5

6

Input: H: Input 1 is higher in potential than input 2 by at least 0.2V. L: Input 1 is lower in potential than input 2 by at least 0.2V.

Phase W –> Phase V Phase V –> Phase W Phase W –> Phase U Phase U –> Phase W Phase V –> Phase W Phase W –> Phase V

Phase U –> Phase V Phase V –> Phase U Phase V –> Phase U

Phase U –> Phase V Phase U –> Phase W Phase W –> Phase U

Hall input Control

UV

H

L

H H

L

H

L L

L

H

L

LB1997

W

L

H

L

HH

V

C

H L H L H L H L H L H L

Pin Assignment

RS

FG

BRAKE

S/S

NC

SIG GND

FRAME GND

CC

1

2

3

4

5

6

7

LB1997

8

28

V

H

27

W

1

IN

26

W

2

IN

25

V

1

IN

24

2

V

IN

23

U

1

IN

22

U

2

IN

FRAME GND

21

V

CC

1

FC

V

CREF

V

W

OUT

PWR GND

NC

9

10

11

C

12

13

14

20

19

18

17

16

15

RF

NC

V

U

V

CC

OUT

3

2

Top view

A11182

No. 5978-4/9

+

–

U

IN

1

V

CC

1

V

CC

2

RF

U

OUT

U

IN

2

+

–

V

IN

1

–

+

V

IN

2

+

–

W

IN

1

W

IN

2

V

H

FG

–

+

V

OUT

W

OUT

PWR GND

V

CC

3

BRAKE

V

CREFVC

–

+

CC

SIG GND

–

+

–

+

RS

FC

S/S

Matrix

Waveform distributor

Hall power

supply

Forward/

reverse

Current limiter

Short brake

CLV/CAV

switching

Thermal shutdown

Reference voltage

Rotation direction detector

A11181

Block Diagram

LB1997

No. 5978-5/9

Sample Application Circuit

LB1997

BRAKE

S/S

CC

0.1µF

1

RS

2

FG

3

BRAKE

4

S/S

5

NC

6

NC

7

SIG GND

FRAME GND

8

CC

9

FC

10

V

CREF

11

V

C

LB1997

FRAME GND

28

V

H

27

W

1

IN

0.047µF 26

W

2

IN

25

1

V

IN

0.047µF 24

V

2

IN

23

1

U

IN

0.047µF 22

U

2

IN

21

V

1

CC

20

RF

19

NC

18

V

3

CC

0.2 to 0.5Ω

5V

0.1µF

12

W

13

PWR GND

14

NC

OUT

V

U

V

CC

OUT

17

2

16

15

0.1µF

12V

A11183

No. 5978-6/9

LB1997

Pin Descriptions

Pin number Pin name Pin voltage Equivalent circuit Pin function

17 4V to 13.6V

18 4V to 13.6V

21 4V to 6V

1R S

2F G

23 22

25 24

27 26

28

VCC2

VCC3

VCC1

UIN1 UIN2

VIN1 VIN2

WIN1 WIN2

V

H

1.2V to

VCC1–1V

100µA

8

200Ω

10 12

25µA

75µA

30 kΩ

2 kΩ

10 kΩ

25µA

VCC1

14 15

A11184

25µA

200Ω

VCC1

13

Source side predrive voltage supply pin Constant current control amplifier voltage supply pin

Power supply pin for all circuits except output transistors, source predriver, and low current control amplifier Reverse detector pin Forward rotation: High Reverse rotation: Low

1 Hall element waveform Schmitt comparator composite output

U phase Hall element input and reverse detector U phase Schmitt

VCC1

comparator input pin Logic High indicates UIN1 > UIN2. V phase Hall element input and

7

reverse detector V phase Schmitt

9

comparator input pin

11

Logic High indicates VIN1 > VIN2. W phase Hall element input and

reverse detector W phase Schmitt

A11185

comparator input pin Logic High indicates WIN1 > WIN2.

Hall element lower side bias voltage supply pin

4 S/S

7 SIG GND

9F C

0V to VCC1

A11186

VCC1

17

75 kΩ

50 kΩ

A11187

When this pin is at 0.7V or lower, or when it is open, all circuits are inactive. When driving motor, set this pin to 2V or higher.

GND pin for all circuits except output

VCC1

Control loop frequency compensator pin. Connecting a capacitor

2 kΩ

between this pin and GND prevents closed loop oscillation in current

20

20 kΩ 5 kΩ

A11188

limiting circuitry.

Continued on next page

No. 5978-7/9

LB1997

Continued from preceding page

Pin number Pi n n am e Pin voltage Equivalent circuit Pin function

Control reference voltage supply

V

1

CC

10 2V to 3V

11

V

CREF

V

C

0V to VCC1

22

200Ω

25µA

30 kΩ 30 kΩ

100µA

10 kΩ

15 kΩ

25µA

200Ω

100µA

A11189

pin. Determines control start voltage.

21

Speed control voltage supply pin V type control technique VC > V VC < V

CREF CREF

: Forward

: Slowdown

(Reverse-blocking circuit built in to prevent reverse rotation.)

12 13 PWR GND 15 16

20 R F

8C C

3 BRAKE

W

OUT

V

OUT

U

OUT

3.9Ω

75 kΩ

8 kΩ 8 kΩ 50 kΩ

100µA

75 kΩ

50 kΩ

VCC2

5

23 1 2

24

A11190

VCC1

16

A11192

VCC1

19

A11191

W phase output Output transistor GND

V phase output U phase output

Upper side output PNP transistor collector pin (common for all 3 phases). For current detection, connect resistor between VCC3 pin and RF pin. Constant current control and current limiter works by detecting this voltage.

V type control/single-side control switching pin CC: High –> Single-side control Low/Open –> V type control

Short brake pin BRAKE: High –> Short brake operation Low/Open –> Motor drive operation

No. 5978-8/9

LB1997

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

No. 5978-9/9

PS