Datasheet LB1895D, LB1895 Datasheet (SANYO)

Ordering number: EN5634

Monolithic Digital IC

LB1895, 1895D

3-Phase Brushless Motor Driver for

CD-ROM Spindle Motors

Overview

The LB1895 and LB1895D are 3-phase brushless motor drivers
for use in CD-ROM spindle motors.

Functions and Features

.

Current linear drive

.

V-type control amplifier built in

.

Because the power supply for the bias circuit on the upper
output side is separate, output with low saturation can be
attained by boosting only that power supply. (Effective when
V

=5V)

CC

.

Because current is detected on the upper side, there is no
voltage loss due to the RF resistance. In addition, the RF
voltage reduces the power dissipation within the IC.
(Effective when V

.

Start/Stop function built in

.

Thermal shutdown circuit built in

.

Overcurrent protection circuit built in

.

Two-channel Hall signal comparator built in.
(For detecting rotation direction and Hall FG output)

.

Hall device bias built in

CC

=5V)

Package Dimensions

unit : mm

3222-HSOP28

[LB1895]

114

0.8

unit : mm

3196-DIP30SD

2.7

15.2

0.3

0.8

[LB1895D]

1528

5.6

0.2

1.8max

0.1

SANYO : HSOP28

1.0

7.6

0.5

SANYO : DIP30SD

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

4097HA(II) No.5634-1/12

LB1895, 1895D

Specifications

Maximum Ratings atTa=25°C

Parameter Symbol Conditions Ratings Unit
Maximum supply voltage 1 V
Maximum supply voltage 2 V
Maximum supply voltage 3 V
Applied output voltage V
Applied input voltage V
Output current I

Allowable power dissipation Pd max

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

Operating Conditions atTa=25°C

Parameter Symbol Conditions Ratings Unit

Supply voltage

1 max 7 V

CC

2 max 14.4 V

CC

3 max 14.4 V

CC

max 14.4 V

O

max VCC1V

I

max 1.0 A

O

Indepent IC [LB1895] 0.5 W
Glass epoxy board

(114.3 × 762 × 1.5 mm) [LB1895D]

14to6V

V

CC

V

2 ^ VCC1 4 to 13.6 V

CC

V

3 2 to 13.6 V

CC

2.4 W
C

°

C

°

Application Examples atTa=25°C

(1) 12 V model

Power supply pins Conditions Ratings Unit

V

1 REG. voltage 4 to 6 V

CC

V

2=VCC3 UN-REG. voltage 4to 13.6 V

CC

(2) 5 V model

Power supply pins Conditions Ratings Unit

V

1=VCC3 REG. voltage 4 to 6 V

CC

V

2 Boost voltage or REG. voltage (Note) 4 to 13.6 V

CC

Note: If VCC2 is used as the boost voltage, output with low saturation can be used.

No.5634-2/12

LB1895, 1895D

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

(Unless otherwise specified)

Parameter Symbol Conditions min typ max Unit
[Supply current]
Supply current 1 I
Supply current 2 I
Supply current 3 I
Output quiescent current 1 I
Output quiescent current 2 I
Output quiescent current 3 I
[Output]
Upper saturation voltage 1 V
Lower saturation voltage 1 V
Upper saturation voltage 2 V
Lower saturation voltage 2 V
Current limiter setting voltage VC
[Hall Amplifier]
Hall amplifier common-mode

input voltage range
Hall amplifier input bias current IH
Minimum Hall input level VH
[S/S pin]
High-level voltage V
Low-level voltage V
Input current I
LEAK current I
[Control stage]
VC pin input current I
VC

pin input current I

REF

Voltage gain VG
Rising threshold voltage VC
Rising threshold voltage width ∆ VC
[Hall supply]
Hall supply voltage V
Allowable current I
[Thermal shutdown]
Operating temperature T
Hysteresis ∆T
[Hall comparator]
Input offset voltage V
Input hysteresis V
Output ON voltage V
Output OFF voltage V
Output current (sink) I

Note: When in S/S OFF (standby) state, the Hall comparator goes high.

*D stands for design target; this value is not measured.

1 VC=VC

CC

2 VC=VC

CC

3 VC=VC

CC
CC1OQ
CC2OQ
CC3OQ

OU
OD
OU
OD

VH

COM

S/SH

S/SL
S/SI
S/SL

VC

VCREF

H

TSD

TSD

offset 10 mV

HCI

HCI

OU
OD

SINK

V
V
V

1

IO= –0.5 A, VCC1=5V,VCC2=VCC3 = 12 V 0.8 1.3 V

1I

O

2I

O

2I

O

RRF = 0.43 Ω 0.25 0.32 0.4 V

L

IB

IN

V
V

VC=VC
VC=VC
∆VRF/∆VC 0.2 0.25 0.3 Times

CO

VC

TH

VC

TH

IH= 5 mA 1.0 1.6 V

H

*D 150 180 210
*D15

hys 3 8 15 mV

Note 4.7 V

REF
REF
REF

= 0 V 200 µA

S/S

= 0 V 30 µA

S/S

= 0 V 30 µA

S/S

= 0.5 A, VCC1=5V,VCC2=VCC3 = 12 V 0.3 0.5 V
= –0.5 A, VCC1=VCC3=5V,VCC2 = 12 V 0.3 0.5 V
= 0.5 A, VCC1=VCC3=5V,VCC2 = 12 V 0.3 0.5 V

= 5 V 200 µA

S/S

= 0 V –30 µA

S/S

= 2.5 V 1 3 µA

REF

= 2.5 V 1 3 µA

REF

= 2.5 V 2.35 2.65 V

REF

= 2.5 V 50 150 mV

REF

47mA
0 0.5 mA

150 250 µA

1

V

1.2

CC

–1.0

V

12µA

60 mVp-p

2.0 VCC1V

0.7 V

20 mA

C

°

C

°

0.3 V

3mA

No.5634-3/12

LB1895, 1895D

Truth Table

1

2

3

4

5

6

W phase → V phase
V phase → W phase L
W phase → U phase
U phase → W phase L
V phase → W phase
W phase → V phase L

U phase → V phase
V phase → U phase L
V phase → U phase

U phase → V phase L
U phase → W phase
W phase → U phase L

2.8

2.4

2.0

1.6

1.2

0.8

0.4

0

|

20 20 400 60 80 100

Allowable power dissipation, Pd max – W

Source → sink

Pd max – Ta

LB1895D

LB1895

Ambient temperature, Ta –°C

Input

UVW

HHL

HLL

LLH

LHL

HLH

LHH

Control

VC

H

H

H

H

H

H

Inputs
H: For each phase input 2, phase input 1 is at a higher electric potential of 0.2 V or more.
L: For each phase input 2, phase input 1 is at a lower electric potential of 0.2 V or more.

No.5634-4/12

LB1895 Pin Assignment

NC

PWR GNDNCW

OUT

VC

LB1895, 1895D

REF

VC

VCREF

FC

FRAME GNDNCSIG GND

2

1

2

IN

IN

W

V

VH

IN

W

S/S

21 20 19 18 17 16 1528 27 26 25 24 23 22

LB1895

9

1 2 3 4 5 6 7

OUTUOUT

V

OUT

PWR GND

W

30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

NC

NC

2
V

CC

VC

3

NC

CC

V

REF

VC

VCREFFCFRAME GND

RF

FRAME GND

8

1
V

FRAME GND

FRAME GND

SIG GND

10 11 12 13 14

CC

COMPOWCOMPO

V

S/S

VH

1

NC

U

2

1

IN

IN

W

W

LB1895D

HSOP-28

2

IN

1

IN

IN

V

U

A06714

Top view

2

IN

V

DIP-30SD

1 2 3 4 5 6 7 8 9

OUTUOUT

V

NC

2

CC

V

3

CC

V

RF

FRAME GND

FRAME GND

10 11

1

CC

V

COMPOWCOMPO

V

FRAME GND

12 13 14 15

1

2

IN

IN

U

U

1

IN

V

A06715

Top view

No.5634-5/12

LB1895 Block Diagram

LB1895, 1895D

2

CC

V

RF

OUT

U

Output control

OUT

V

OUT

W

3

CC

V

PWR GND

–

Current limiter

REF

VC

VCREF

+

–

+

VC

SIG GND

Thermal shutdown

voltage

Reference

A06716

FC S/S

1

CC

V

For/Rev

COMPO

Matrix FR

supply

+

–

1

2

IN

IN

U

U

+

–

2

1

IN

IN

V

V

+

1

IN

W

Hall power

–

2

VH

IN

W

+

–

+

W

COMPO

V

–

No.5634-6/12

LB1895, 1895D

Pin Descriptions

Note: Numbers within ( ) are for LB1895D

Pin No. Symbol Voltage Equivalent circuit Description

4V

6 (5) V

8 (10) V

9(11) V

10 (12) W

2 4 V to 13.6 V

CC

3 2 V to 13.6 V

CC

1 4Vto6V

CC

COMPO

COMPO

150µA

10kΩ

V

CC1

9 10

(11, 12)

A06717

Supply pin that provides pre-drive
voltage for the source side.

Supply pin that provides voltage
for the constant current control
amplifier.

Supply pin that provides voltage
for all circuits except the output
transistor, source-side pre-drive,
and constant current control
amplifier.

V-phase Hall element waveform
Schmitt comparator output pin.

W-phase Hall element waveform
Schmitt comparator output pin.

12 (13) U

13 (14) U

14 (15) V

15 (16) V

16 (17) W

17 (18) W

18 (19) VH

V

CC1

1

IN

14
16

(15)
(17)

12

(13)

75µA

30kΩ

200Ω

200Ω

25µA

25µA25µA

25µA

2kΩ

1.2 V to
1–1V

V

CC

2

IN

1

IN

2

IN

1.2 V to

V

1–1V

1

IN

2

IN

CC

200Ω

V

18
(19)

25µA

CC1

200Ω

A06720

13

(14)

A06718

V

A06719

CC1

(16)
(18)

15
17

U-phase Hall element input pin.
Logic HIGH is represented by
U

1>UIN2.

IN

V-phase Hall element input pin,
and V-phase Schmitt comparator
input pin for reverse detection.
Logic HIGH is represented by
V

1>VIN2.

IN

W-phase Hall element input pin,
and W-phase Schmitt comparator
input pin for reverse detection.
Logic HIGH is represented by
W

1>WIN2.

IN

This pin provides the lower bias
voltage for the Hall element.

Continued on next page.

No.5634-7/12

LB1895, 1895D

Continued from preceding page.

Pin No. Symbol Voltage Equivalent circuit Description

None of the circuits operate if the
voltage on this pin is 0.7 V or less,
or if this pin is open.
When driving the motor, the
voltage on this pin must be 2 V or
more.

19 (20) S/S 0 V to V

CC

V

CC1

75kΩ

1

19

(20)

50kΩ

A06721

20 (21)

SIG
GND

22 (25) FC

23 (26) VC

REF

2Vto3V

24 (27) VC 0 V toV

25 (29) W
27 (30)

1V
2U

OUT

PWR
GND

OUT
OUT

7 (6) RF

CC

Ground connection for all circuits
except the outputs.

V

CC1

Control loop frequency
characteristics compensation pin.
Connect a capacitor between this

2kΩ

pin and GND to stop closed loop
oscillation in the current control
system.

22

(25)

20kΩ 5kΩ

A06722

V

CC1

Control reference voltage
application pin. This voltage
determines the control start

24

(27)

200Ω

200Ω

23
(26)

voltage.

Speed control voltage application

100µA100µA

1

A06723

pin. V-type control, where:
VC>VC
VC<VC

= forward and

REF

= reverse

REF

W-phase output pin.

V

CC2

7

(6)

Output transistor ground.

V-phase output pin.

25 1 2

(29)

27

(30)

A06724

U-phase output pin.
Upper output NPN transistor

collector pin (three-phase
common). Connect a resistor
between V
current detection. When this

3 and the RF pin for

CC

voltage is detected, the constant
current control and current limiter
circuits function.

No.5634-8/12

LB1895 Sample Application Circuit (1)

CTL signal

CTL reference

0.1µF

28 27 26 25 24 23 22

1 2 3 4 5 6 7 8 9 10 11 12 13 14

0.1µF

0.1µF

0.2 to 0.5Ω

12V

0.1µF

LB1895, 1895D

voltage

0.1µF

LB1895

S/S

21

20 19 18 17 16 15

0.1µF

5V

0.047µF

0.047µF

0.047µF

LB1895 Sample Application Circuit (2)

CTL signal

CTL reference

0.1µF

28 27 26 25 24 23 22

1 2 3 4 5 6 7 8 9 10 11 12 13 14

0.1µF

0.1µF

0.1µF

6V 5V

0.2 to 0.5Ω

0.1µF

voltage

0.1µF

LB1895

S/S

21

20 19 18 17 16 15

0.1µF

5V

0.047µF

0.047µF

A06725

0.047µF

Between power supply and GND, Output and GND, and between Hall inputs:

The capacitors may change, depending on the motor.
The capacitor between the Hall inputs in particular may not be required with some motors.

A06726

No.5634-9/12

LB1895D Sample Application Circuit (1)

CTL signal

CTL reference

voltage

0.1µF

0.1µF

LB1895, 1895D

S/S

30 29 28 27 26 25 24

LB1895D

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

0.1µF

0.1µF

0.2 to 0.5Ω

0.1µF

12V

LB1895D Sample Application Circuit (2)

23

22 21 20 19 18 17 16

0.1µF

5V

0.047µF

0.047µF

0.047µF

A06727

CTL signal

CTL reference

voltage

0.1µF

30 29 28 27 26 25 24

0.1µF

23

22 21 20 19 18 17 16

S/S

LB1895D

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

6V

0.2 to 0.5Ω

0.1µF

0.1µF

5V5V

0.1µF

0.1µF

Between power supply and GND, Output and GND, and between Hall inputs:

The capacitors may change, depending on the motor.
The capacitor between the Hall inputs in particular may not be required with some motors.

0.047µF

0.047µF

0.047µF

A06728

No.5634-10/12

LB1895, 1895D

LB1895,1895D — Example of using a comparator to detect the direction of rotation

When VC ^ VC

When VC % VC

V

COMPO

W

COMPO

V

COMPO

W

COMPO

REF

REF

A06729

When the phasing is as shown above, the direction of rotation is determined to be
‘‘forward’’ if W
‘‘reverse’’ if W

COMPO

is low at the rising edge of V

COMPO

is high at the rising edge of V

COMPO
COMPO

, and
.

1) Reverse full braking method
Braking is applied with VC = L until reverse rotation is detected. The moment that reverse rotation is detected, the driving
power is turned off or a short pulse is input.

2) Intermittent braking method

V

COMPO

W

COMPO

fig. 1

VC = 2.5V
VC = 0V

fig. 2

If braking is applied according to the value obtained by OR logic in V

COMPO

and W

together, for example, reverse braking

COMPO

A06730

is applied according to the following timing.
As a result, when the rotation speed is fast, braking is applied many times; at slower speeds, braking is applied fewer times.

Furthermore, if the V

COMPO

and W

logic combination is changed, the duty of VC = 0 V – 2.5 V also changes.

COMPO

No.5634-11/12

LB1895, 1895D

The following graph illustrates the change in the rotation speed after braking is applied under methods 1 and 2 described above.

Method 2 has less
overshoot

2

Motor rotation speed

1

Time after brakes were applied

A06731

No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment,
nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or
indirectly cause injury, death or property loss.

Anyone purchasing any products described or contained herein for an above-mentioned use shall:
1 Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors

and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and
expenses associated with such use:

2 Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO

ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally.

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 April, 1997. Specifications and information herein are subject to change without notice.

No.5634-12/12