Datasheet LB1995 Datasheet (SANYO)

Ordering number : EN5976A

LB1995

Monolithic Digital IC

LB1995

Three-Phase Brushless Motor Driver

for CD-ROM Spindle Drive

Overview

The LB1995 is a three-phase brushless motor driver especially suited for CD-ROM spindle motor drives.

Functions

• Current linear drive

• Control V type amplifier with single side control switching pin

• 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

Package Dimensions

unit: mm

3227-HSOP24

[LB1995]

15.3

24

1

2.0

1.9

With substrate

1.6

1.2

4.3 0.3

0.3

0.8 0.85

Pd max – Ta

13

7.9

12

2.25

0.1

0.65

10.5

1.3

0.25

2.5max

SANYO : HSOP24

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

SANYO Electric Co.,Ltd. Semiconductor Company

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

60499RM(KI)/30299RM(KI)

No. 5976-1/9

LB1995

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 0.8 W

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

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

4 to 13.6 V 4 to 13.6 V

W1.9

˚C ˚C

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

V

1 = VCC3

CC

VCC2

Unregulated voltage 4 to 13.6 V

Boost-up voltage or regulated voltage (Note)

4 to 13.6 V

No. 5976-2/9

LB1995

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]

VC pin input current V

pin input current

CREF

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

V

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 = 5 mA

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

VCC1

1 µA 1 µA

Unit

30 µA

mV

P-P

No. 5976-3/9

Truth T able

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

L

H

L L

L

H

L

H

LB1995

W

L

H

LL

H

V

C

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

Pin Assignment

V

OUT

U

OUT

V

CC

V

CC

RF

V

CC

FRAME GND

U

IN

1

2

3

2

4

3

5

6

1

LB1995

7

2

24

PWR GND

23

W

OUT

22

V

C

21

V

CREF

20

FC

19

CC

FRAME GND

18

SIG GND

8

U

1

IN

9

V

2

IN

10

V

1

IN

11

W

2

IN

12

W

1

IN

17

16

15

14

13

S/S

BRAKE

FG

RS

V

H

Top view

A11125

No. 5976-4/9

+

–

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

A11124

Block Diagram

LB1995

No. 5976-5/9

Sample Application Circuit

LB1995

0.2 to 0.5Ω

0.1µF

0.047µF

1

V

OUT

2

U

OUT

3

2

V

CC

4

3

V

CC

5

RF

6

1

V

CC

FRAME GND

7

2

U

IN

8

1

U

IN

9

V

2

IN

10

V

1

IN

11

2

W

IN

LB1995

PWR GND

W

OUT

V

CREF

FC

CC

FRAME GND

SIG GND

S/S

BRAKE

FG

RS

24

23

22

C

21

20

19

18

17

16

15

14

0.1µF

CTRL signal

CTRL reference voltage

0.1µF CC

S/S

BRAKE

Power supply - GND Output - GND Between Hall inputs

12

1

W

IN

13

V

H

A11126

Capacitor requirements may change depending on motor. For some motors, capacitor between Hall inputs may not be needed.

No. 5976-6/9

LB1995

Pin Descriptions

Pin number Pin name Pin voltage Equivalent circuit Pin function

3 4V to 13.6V

4 4V to 13.6V

6 4V to 6V

14 R S

15 F G

8 7

10

9

12 11

13

17 S/S

VCC2

VCC3

VCC1

UIN1 UIN2

VIN1 VIN2

WIN1 WIN2

V

H

1.2V to

VCC1–1V

0V to VCC1

100µA

8

200Ω

10 12

25µA

75µA

30 kΩ

10 kΩ

25µA

2 kΩ

75 kΩ

VCC1

14 15

A11127

VCC1

25µA

200Ω

A11128

VCC1

13

A11129

VCC1

17

50 kΩ

A11130

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 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 comparator input pin Logic High indicates WIN1 > WIN2.

Hall element lower side bias voltage supply pin

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.

18 SIG GND

20 F C

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

A11131

limiting circuitry.

Continued on next page

No. 5976-7/9

LB1995

Continued from preceding page

Pin number Pin name Pin voltage Equivalent circuit Pin function

Control reference voltage supply

V

1

CC

21 2V to 3V

22

V

CREF

V

C

0V to VCC1

22

200Ω

25µA

30 kΩ

100µA

10 kΩ

15 kΩ

25µA

200Ω

30 kΩ

100µA

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 prevents reverse rotation.)

A11132

23 24 PWR GND

1 2

5R F

19 C C

16 BRAKE

W

V U

OUT

OUT OUT

3.9Ω

75 kΩ

8 kΩ 8 kΩ 50 kΩ

100µA

75 kΩ

50 kΩ

VCC2

5

23 1 2

24

A11133

VCC1

16

A11135

VCC1

A11134

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

19

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

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

No. 5976-8/9

LB1995

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. 5976-9/9

PS