SANYO LB1895D

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.
Package Dimensions
unit : mm
3222-HSOP28
[LB1895]
. Current linear drive
. V-type control amplifier built in
. Because the power supply for the bias circuit on the upper
.
.
.
.
.
0.5
7.6
5.6
15
1
14
2.7
0.2
0.3
1.8max
0.8
15.2
0.1
.
output side is separate, output with low saturation can be
attained by boosting only that power supply. (Effective when
VCC = 5 V)
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 VCC = 5 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
28
1.0
Functions and Features
0.8
SANYO : HSOP28
unit : mm
3196-DIP30SD
[LB1895D]
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 at Ta = 25 °C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage 1
VCC1 max
7
V
Maximum supply voltage 2
VCC2 max
14.4
V
Maximum supply voltage 3
VCC3 max
14.4
V
Applied output voltage
VO max
14.4
V
Applied input voltage
VI max
VCC1
V
Output current
IO max
1.0
A
Indepent IC [LB1895]
0.5
W
Glass epoxy board
(114.3 × 762 × 1.5 mm) [LB1895D]
2.4
W
Allowable power dissipation
Pd max
Operating temperature
Topr
–20 to +75
°C
Storage temperature
Tstg
–55 to +150
°C
Ratings
Unit
Operating Conditions at Ta = 25 °C
Parameter
Symbol
Conditions
VCC1
VCC2
Supply voltage
^ VCC1
VCC3
4 to 6
V
4 to 13.6
V
2 to 13.6
V
Application Examples at Ta = 25 °C
(1) 12 V model
Power supply pins
VCC1
VCC2 = VCC3
Conditions
REG. voltage
UN-REG. voltage
Ratings
Unit
4 to 6
V
4 to 13.6
V
Ratings
Unit
(2) 5 V model
Power supply pins
VCC1 = VCC3
VCC2
Conditions
REG. voltage
Boost voltage or REG. voltage (Note)
4 to 6
V
4 to 13.6
V
Note: If VCC2 is used as the boost voltage, output with low saturation can be used.
No.5634-2/12
LB1895, 1895D
Electrical Characteristics at Ta = 25 °C, VCC1 = 5 V, VCC2 = VCC3 = 12 V
(Unless otherwise specified)
Parameter
Symbol
Conditions
min
typ
max
Unit
[Supply current]
Supply current 1
ICC1
VC = VCREF
4
7
mA
Supply current 2
ICC2
VC = VCREF
0
0.5
mA
VC = VCREF
150
Supply current 3
ICC3
250
µA
Output quiescent current 1
ICC1OQ
VS/S = 0 V
200
µA
Output quiescent current 2
ICC2OQ
VS/S = 0 V
30
µA
Output quiescent current 3
ICC3OQ
VS/S = 0 V
30
µA
[Output]
Upper saturation voltage 1
VOU1
Lower saturation voltage 1
VOD1
IO = –0.5 A, VCC1 = 5 V, VCC2 = VCC3 = 12 V
IO = 0.5 A, VCC1 = 5 V, VCC2 = VCC3 = 12 V
0.3
0.5
V
Upper saturation voltage 2
VOU2
IO = –0.5 A, VCC1 = VCC3 = 5 V, VCC2 = 12 V
0.3
0.5
V
Lower saturation voltage 2
VOD2
IO = 0.5 A, VCC1 = VCC3 = 5 V, VCC2 = 12 V
RRF = 0.43 Ω
0.3
0.5
V
0.32
0.4
V
VCC1
–1.0
V
Current limiter setting voltage
VCL
0.25
0.8
1.3
V
[Hall Amplifier]
Hall amplifier common-mode
input voltage range
VHCOM
1.2
1
Hall amplifier input bias current
IHIB
Minimum Hall input level
VHIN
60
High-level voltage
VS/SH
2.0
Low-level voltage
VS/SL
2
µA
mVp-p
[S/S pin]
Input current
IS/SI
VS/S = 5 V
LEAK current
IS/SL
VS/S = 0 V
VCC1
V
0.7
V
200
µA
–30
µA
[Control stage]
VC pin input current
IVC
VC = VCREF = 2.5 V
1
3
µA
VCREF pin input current
IVCREF
VC = VCREF = 2.5 V
1
3
µA
Voltage gain
VGCO
∆VRF/∆VC
Rising threshold voltage
VCTH
VCREF = 2.5 V
2.35
2.65
V
∆ VCTH
VCREF = 2.5 V
50
150
mV
Rising threshold voltage width
0.2
0.25
0.3
Times
[Hall supply]
Hall supply voltage
VH
Allowable current
IH
IH = 5 mA
1.0
1.6
20
V
mA
[Thermal shutdown]
Operating temperature
Hysteresis
TTSD
*D
∆TTSD
*D
150
180
210
15
°C
°C
[Hall comparator]
Input offset voltage
Input hysteresis
Output ON voltage
VHCIoffset
VHCIhys
3
VOU
Output OFF voltage
VOD
Output current (sink)
ISINK
Note
4.7
3
8
10
mV
15
mV
0.3
V
V
mA
Note: When in S/S OFF (standby) state, the Hall comparator goes high.
*D stands for design target; this value is not measured.
No.5634-3/12
Allowable power dissipation, Pd max – W
LB1895, 1895D
Pd max – Ta
2.8
2.4
LB1895D
2.0
1.6
1.2
0.8
LB1895
0.4
0
|20
0
20
40
60
80
100
Ambient temperature, Ta – °C
Truth Table
Source → sink
1
2
3
4
5
6
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 phase
Input
U
V
W
H
H
L
H
L
L
L
L
H
L
H
L
H
L
L
H
H
H
Control
VC
H
L
H
L
H
L
H
L
H
L
H
L
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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
VOUT
UOUT
NC
VCC2
VCC3
RF
FRAME GND
FRAME GND
FRAME GND
VCC1
VCOMPO
WCOMPO
UIN1
UIN2
VIN1
PWR GND
WOUT
NC
VC
VCREF
VCREF
FC
FRAME GND
FRAME GND
FRAME GND
SIG GND
S/S
VH
WIN2
WIN1
VIN2
2
3
4
5
6
7
UOUT
NC
VCC2
NC
VCC3
RF
8
9
10
11
12
13
14
UIN2
VIN1
FC
22
UIN1
VCREF
VCREF
23
NC
VC
24
WCOMPO
WOUT
25
VCOMPO
NC
26
VCC1
PWR GND
27
NC
SIG GND
S/S
VH
WIN2
WIN1
VIN2
FRAME GND
NC
28
FRAME GND
1
VOUT
LB1895, 1895D
LB1895 Pin Assignment
21
20
19
18
17
16
15
LB1895
HSOP-28
A06714
Top view
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
LB1895D
DIP-30SD
A06715
Top view
No.5634-5/12
+
–
+
–
VIN1
VIN2
WIN1
WIN2
–
+
–
+
–
UIN2
VH
+
UIN1
VCC1
Matrix FR
For/Rev
VCOMPO WCOMPO
Hall power
supply
FC
S/S
Reference
voltage
Current limiter
Thermal shutdown
+
–
+
–
A06716
SIG GND
VC
VCREF
VCREF
VCC3
PWR GND
WOUT
VOUT
UOUT
RF
VCC2
LB1895, 1895D
LB1895 Block Diagram
Output control
No.5634-6/12
LB1895, 1895D
Pin Descriptions
Note: Numbers within (
Pin No.
Symbol
) are for LB1895D
Voltage
Equivalent circuit
Description
4
VCC2
4 V to 13.6 V
Supply pin that provides pre-drive
voltage for the source side.
6 (5)
VCC3
2 V to 13.6 V
Supply pin that provides voltage
for the constant current control
amplifier.
4 V to 6 V
Supply pin that provides voltage
for all circuits except the output
transistor, source-side pre-drive,
and constant current control
amplifier.
8 (10)
VCC1
9 (11)
VCOMPO
V-phase Hall element waveform
Schmitt comparator output pin.
VCC1
10kΩ
150µA
9 10
(11, 12)
10 (12)
W-phase Hall element waveform
Schmitt comparator output pin.
WCOMPO
A06717
U-phase Hall element input pin.
Logic HIGH is represented by
UIN1 > UIN2.
VCC1
12 (13)
UIN1
13
(14)
200Ω
1.2 V to
VCC1 –1 V
12
(13)
200Ω
25µA
13 (14)
25µA
UIN2
A06718
14 (15)
VCC1
VIN1
25µA
15 (16)
VIN2
1.2 V to
VCC1 –1 V
16 (17)
17 (18)
WIN1
14
16
200Ω
(15)
(17)
15
200Ω
25µA
17
(16)
(18)
25µA
A06719
WIN2
V-phase Hall element input pin,
and V-phase Schmitt comparator
input pin for reverse detection.
Logic HIGH is represented by
VIN1 > VIN2.
W-phase Hall element input pin,
and W-phase Schmitt comparator
input pin for reverse detection.
Logic HIGH is represented by
WIN1 > WIN2.
This pin provides the lower bias
voltage for the Hall element.
VCC1
75µA
18
18 (19)
VH
(19)
30kΩ
2kΩ
A06720
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.
VCC1
19 (20)
S/S
75kΩ
19
0 V to VCC1
(20)
50kΩ
A06721
20 (21)
SIG
GND
Ground connection for all circuits
except the outputs.
Control loop frequency
characteristics compensation pin.
Connect a capacitor between this
pin and GND to stop closed loop
oscillation in the current control
system.
VCC1
2kΩ
22 (25)
FC
22
(25)
20kΩ
5kΩ
A06722
VCC1
23 (26)
VCREF
2 V to 3 V
24
(27)
100µA
24 (27)
VC
23
200Ω
200Ω
Control reference voltage
application pin. This voltage
determines the control start
voltage.
(26)
Speed control voltage application
pin. V-type control, where:
VC > VCREF = forward and
VC < VCREF = reverse
100µA
0 V toVCC1
A06723
25 (29)
WOUT
27 (30)
PWR
GND
1
VOUT
2
UOUT
W-phase output pin.
Output transistor ground.
VCC2
7 (6)
V-phase output pin.
25 1
U-phase output pin.
2
(29)
27
7 (6)
RF
(30)
A06724
Upper output NPN transistor
collector pin (three-phase
common). Connect a resistor
between VCC3 and the RF pin for
current detection. When this
voltage is detected, the constant
current control and current limiter
circuits function.
No.5634-8/12
LB1895, 1895D
S/S
CTL reference
voltage
CTL signal
LB1895 Sample Application Circuit (1)
0.1µF
0.1µF
0.047µF
28
27
26
25
24
23
21
22
20
19
18
17
16
15
9
10
11
12
13
14
L B 1 8 9 5
1
2
0.1µF
3
4
5
6
7
8
0.1µF
0.047µF
0.2 to 0.5Ω
0.1µF
12V
0.047µF
0.1µF
5V
A06725
S/S
CTL reference
voltage
CTL signal
LB1895 Sample Application Circuit (2)
0.1µF
0.1µF
0.047µF
28
27
26
25
24
23
22
21
20
19
18
17
16
15
9
10
11
12
13
14
L B 1 8 9 5
1
2
3
4
5
0.1µF
0.1µF
0.1µF
6V
6
7
8
0.2 to 0.5Ω
0.1µF
5V
0.047µF
5V
0.047µF
0.1µF
A06726
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.
No.5634-9/12
LB1895, 1895D
S/S
CTL signal
CTL reference
voltage
LB1895D Sample Application Circuit (1)
0.1µF
0.1µF
0.047µF
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
11
12
13
14
15
L B 1 8 9 5 D
1
2
0.1µF
3
4
5
6
7
8
9
10
0.1µF
0.047µF
0.2 to 0.5Ω
0.1µF
12V
0.047µF
0.1µF
5V
A06727
S/S
CTL reference
voltage
CTL signal
LB1895D Sample Application Circuit (2)
0.1µF
0.1µF
0.047µF
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
11
12
13
14
15
L B 1 8 9 5 D
1
0.1µF
2
3
4
5
6
7
8
9
10
0.2 to 0.5Ω
0.1µF
0.1µF
6V
5V
0.047µF
5V
0.047µF
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.
A06728
No.5634-10/12
LB1895, 1895D
LB1895,1895D — Example of using a comparator to detect the direction of rotation
When VC ^ VCREF
VCOMPO
WCOMPO
When VC % VCREF
VCOMPO
WCOMPO
A06729
When the phasing is as shown above, the direction of rotation is determined to be
‘‘forward’’ if WCOMPO is low at the rising edge of VCOMPO, and
‘‘reverse’’ if WCOMPO is high at the rising edge of VCOMPO.
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
VCOMPO
WCOMPO
fig. 1
VC = 2.5V
VC = 0V
fig. 2
A06730
If braking is applied according to the value obtained by OR logic in VCOMPO and WCOMPO together, for example, reverse braking
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 VCOMPO and WCOMPO logic combination is changed, the duty of VC = 0 V – 2.5 V also changes.
No.5634-11/12
LB1895, 1895D
Motor rotation speed
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
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