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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]
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 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
15
5.6
1.0 0.2 0.1
1 0.8 2.7 0.3
14
15.2
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
1.8max
0.5
7.6
LB1895, 1895D
Specifications
Maximum Ratings at Ta = 25 C
Parameter Maximum supply voltage 1 Maximum supply voltage 2 Maximum supply voltage 3 Applied output voltage Applied input voltage Output current Allowable power dissipation Operating temperature Storage temperature Symbol VCC1 max VCC2 max VCC3 max VO max VI max IO max Indepent IC [LB1895] Pd max Topr Tstg Glass epoxy board (114.3 x 762 x 1.5 mm) [LB1895D] Conditions Ratings 7 14.4 14.4 14.4 VCC1 1.0 0.5 2.4 -20 to +75 -55 to +150 Unit V V V V V A W W C C
Operating Conditions at Ta = 25 C
Parameter Supply voltage Symbol VCC1 VCC2 VCC3 ^ VCC1 Conditions Ratings 4 to 6 4 to 13.6 2 to 13.6 Unit V V V
Application Examples at Ta = 25 C
(1) 12 V model
Power supply pins VCC1 VCC2 = VCC3 REG. voltage UN-REG. voltage Conditions Ratings 4 to 6 4 to 13.6 Unit V V
(2) 5 V model
Power supply pins VCC1 = VCC3 VCC2 REG. voltage Boost voltage or REG. voltage (Note) Conditions Ratings 4 to 6 4 to 13.6 Unit V 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 [Supply current] Supply current 1 Supply current 2 Supply current 3 Output quiescent current 1 Output quiescent current 2 Output quiescent current 3 [Output] Upper saturation voltage 1 Lower saturation voltage 1 Upper saturation voltage 2 Lower saturation voltage 2 Current limiter setting voltage [Hall Amplifier] Hall amplifier common-mode input voltage range Hall amplifier input bias current Minimum Hall input level [S/S pin] High-level voltage Low-level voltage Input current LEAK current [Control stage] VC pin input current VCREF pin input current Voltage gain Rising threshold voltage Rising threshold voltage width [Hall supply] Hall supply voltage Allowable current [Thermal shutdown] Operating temperature Hysteresis [Hall comparator] Input offset voltage Input hysteresis Output ON voltage Output OFF voltage Output current (sink) VHCIoffset VHCIhys VOU VOD ISINK Note 4.7 3 3 8 10 15 0.3 mV mV V V mA TTSD TTSD *D *D 150 180 15 210 C C VH IH IH = 5 mA 20 1.0 1.6 V mA IVC IVCREF VGCO VCTH VCTH VC = VCREF = 2.5 V VC = VCREF = 2.5 V VRF/VC VCREF = 2.5 V VCREF = 2.5 V 0.2 2.35 50 1 1 0.25 3 3 0.3 2.65 150 A A Times V mV VS/SH VS/SL IS/SI IS/SL VS/S = 5 V VS/S = 0 V -30 2.0 VCC1 0.7 200 V V A A VHCOM IHIB VHIN 60 1.2 1 VCC1 -1.0 2 V A mVp-p VOU1 VOD1 VOU2 VOD2 VCL IO = -0.5 A, VCC1 = 5 V, VCC2 = VCC3 = 12 V IO = 0.5 A, VCC1 = 5 V, VCC2 = VCC3 = 12 V IO = -0.5 A, VCC1 = VCC3 = 5 V, VCC2 = 12 V IO = 0.5 A, VCC1 = VCC3 = 5 V, VCC2 = 12 V RRF = 0.43 0.25 0.8 0.3 0.3 0.3 0.32 1.3 0.5 0.5 0.5 0.4 V V V V V ICC1 ICC2 ICC3 ICC1OQ ICC2OQ ICC3OQ VC = VCREF VC = VCREF VC = VCREF VS/S = 0 V VS/S = 0 V VS/S = 0 V 4 0 150 7 0.5 250 200 30 30 mA mA A A A A Symbol Conditions min typ max Unit
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
LB1895, 1895D
Allowable power dissipation, Pd max - W
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 H H L L H L V H L L H L H W L L H L 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
28
1
VOUT 1 27 2 WOUT 26 3 NC 4 VC 5
VCREF VCREF
PWR GND UOUT NC VCC2 NC 6 VCC3 7 RF
VOUT NC
30
UOUT 2 28 3 27 4 26 5 25 6 24 7 23 8 FRAME GND 22 FRAME GND SIG GND S/S VH WIN2 WIN1 VIN2 8 VCC1 VCOMPO WCOMPO NC UIN1 UIN2 VIN1 9 10 11 12 13 14 15 DIP-30SD 16 17 18 19 20 21 FRAME GND 9 10 11 12 13 14 FRAME GND FC 25 24 23 22 NC VCC2 VCC3 RF FRAME GND FRAME GND FRAME GND VCC1 VCOMPO WCOMPO UIN1 UIN2 VIN1
PWR GND NC WOUT VC
VCREF VCREF
LB1895 Pin Assignment
29
FC
LB1895
FRAME GND
21
LB1895D
NC 20 19 18 17 16 15 SIG GND S/S VH WIN2 WIN1 VIN2
LB1895, 1895D
A06715
Top view
HSOP-28
A06714
Top view
No.5634-5/12
VCC1 RF
+ -
VCC2
LB1895 Block Diagram
UIN1
UIN2
VIN1
+ -
Matrix FR
Output control
VIN2
UOUT VOUT WOUT
WIN1
+ -
WIN2
Hall power supply Current limiter
-
PWR GND VCC3
VH
For/Rev
+ - +
LB1895, 1895D
- +
VCREF VCREF
VC
+ -
Reference voltage
Thermal shutdown
SIG GND
VCOMPO WCOMPO
FC
S/S
A06716
No.5634-6/12
LB1895, 1895D
Pin Descriptions
Note: Numbers within (
Pin No. 4 6 (5) Symbol VCC2 VCC3
) are for LB1895D
Voltage Equivalent circuit Description 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.
VCC1
4 V to 13.6 V 2 V to 13.6 V
8 (10)
VCC1
4 V to 6 V
9 (11)
VCOMPO
V-phase Hall element waveform Schmitt comparator output pin.
150A
10k 9 10 (11, 12)
10 (12)
WCOMPO
W-phase Hall element waveform Schmitt comparator output pin.
A06717
VCC1
12 (13)
UIN1
200
U-phase Hall element input pin. Logic HIGH is represented by UIN1 > UIN2.
1.2 V to VCC1 -1 V 13 (14) UIN2
12 (13)
13 (14)
200
25A
25A
A06718
14 (15)
VIN1
25A
VCC1
15 (16)
VIN2 1.2 V to VCC1 -1 V
14 16 (15) (17) 200 200 15 17 (16) (18)
A06719
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.
16 (17)
WIN1 WIN2
25A
25A
17 (18)
VCC1 75A 18
18 (19)
VH
30k 2k
(19)
A06720
Continued on next page.
No.5634-7/12
LB1895, 1895D
Continued from preceding page.
Pin No. Symbol Voltage Equivalent circuit
VCC1 19 (20) 75k 50k
A06721
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. Ground connection for all circuits except the outputs.
19 (20)
S/S
0 V to VCC1
20 (21)
SIG GND
VCC1
2k
22 (25)
FC
22 (25) 20k 5k
A06722
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
23 (26)
VCREF
2 V to 3 V
24 (27) 200
200
23 (26)
Control reference voltage application pin. This voltage determines the control start voltage.
100A
100A
24 (27)
VC
0 V toVCC1
A06723
Speed control voltage application pin. V-type control, where: VC > VCREF = forward and VC < VCREF = reverse
25 (29) 27 (30) 1 2
WOUT PWR GND VOUT UOUT
25 1 (29) 27 2 VCC2 7 (6)
W-phase output pin. Output transistor ground. V-phase output pin. U-phase output pin. 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.
7 (6)
RF
(30)
A06724
No.5634-8/12
LB1895, 1895D
LB1895 Sample Application Circuit (1)
CTL reference voltage
CTL signal
0.1F 0.1F 0.047F
28 27 26 25 24 23 22 21 20 19 18 17 16 15
LB1895
1
2
3
4
5
6
7
8
9
10
S/S
11
12
13
14
0.1F
0.1F 0.2 to 0.5 0.1F
0.047F 0.1F
0.047F
12V
5V
A06725
LB1895 Sample Application Circuit (2)
CTL reference voltage
CTL signal
0.1F 0.1F 0.047F
28 27 26 25 24 23 22 21 20 19 18 17 16 15
LB1895
1
2
3
4
5
6
7
8
9
10
S/S
11
12
13
14
0.1F 0.1F 0.1F
0.2 to 0.5 0.1F 5V 5V 0.1F
0.047F
0.047F
6V
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
LB1895D Sample Application Circuit (1)
CTL reference voltage CTL signal
0.1F
0.1F
S/S
0.047F
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
LB1895D
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
0.1F
0.1F 0.2 to 0.5 0.1F
0.047F 0.1F
0.047F
12V
5V
A06727
LB1895D Sample Application Circuit (2)
CTL reference voltage CTL signal
0.1F
0.1F
S/S
0.047F
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
LB1895D
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
0.1F
0.1F
0.2 to 0.5 0.1F 6V 5V 5V 0.1F
0.047F
0.047F
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. Intermittent braking method
2)
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
The following graph illustrates the change in the rotation speed after braking is applied under methods 1 and 2 described above.
Motor rotation speed
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

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