SANYO LB1895D, LB1895 Datasheet

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