Ordering number : ENN6185
71699RM (OT) No. 6185-1/9
Overview
The LB1988N is a sensorless motor driver that includes an
on-chip loading motor driver as well. It is optimal for
VCR drum motor drive.
Functions and Features
Soft switching drive
Does not require Hall-effect sensors
Does not require FG sensors
PG amplifier
Thermal shutdown circuit
Current limiter circuit
Loading motor driver
Package Dimensions
unit: mm
3196-DIP30SD
1
15
30
16
1.14
1.78
27.2
0.25
10.16
8.6
0.48
0.95
3.25
3.0
3.95max
SANYO: DIP30SD
[LB1988N]
LB1988N
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Three-Phase Sensorless Motor Driver
+ Loading Motor Driver
Monolithic Digital IC
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.
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage 1
V
CC
max
14.5
V
Maximum supply voltage 2
V
CCL
max
14.5
V
Maximum supply voltage 3
V
REG
max
7.0
V
Maximum applied output voltage
Vomax
14.5
V
Maximum applied input voltage
VI1max
0.3 to V
REG
+ 0.3
V
Maximum cylinder current
Iomax
1.0
A
Maximum loading current
Iomax (AVE)
0.4
A
Iomax (peak)
1.2
A
Allowable power dissipation
Pdmax
When mounted on the specified printed circuit board
*
2.8
W
Operating temperature
Topr
20 to +75
C
Storage temperature
Tstg
55 to +150
C
Specifications
Absolute Maximum Ratings
at Ta = 25C
Note:
*
Specified printed circuit board: 114.3
76.1
1.6 mm
3
, glass epoxy
No. 6185-2/9
LB1988N
Parameter
Symbol
Conditions
Ratings
Unit
Supply voltage 1
V
CC
8 to 13.8
V
Supply voltage 2
V
CCL
8 to 13.8
V
Supply voltage 3
V
REG
4 to 6
V
Allowable Operating Ranges
at Ta = 25C
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Supply voltage 1
I
CC
VC = 0 V, XIN = YIN = 0 V
6.5
10
mA
Supply voltage 2
I
CCL
VC = 0 V, XIN = YIN = 0 V
1
mA
Supply voltage 3
I
REG
VC = 0 V, XIN = YIN = 0 V
6.5
10
mA
Output saturation voltage 1
V
OSAT
1
I
O
= 0.4 A, source + sink
1.4
2.0
V
Output saturation voltage 2
V
OSAT
2
I
O
= 0.8 A, source + sink
1.8
2.6
V
MC pin common-mode input voltage range
V
IC
0
V
CC
2
V
VC pin input bias current
I
VC
VC = 0 V
2
1
A
Control start voltage
VTHVC
V
RF
= 10 mV
2.4
2.5
2.6
V
Closed loop control gain
GMVC
RF = 0.5
0.75
0.95
1.15
A/V
PCOUT output current 1
I
PCOU
Source side
90
A
PCOUT output current 2
I
PCOD
Sink side
90
A
VCOIN input current
I
VCOIN
VCOIN = 5 V
0.1
0.2
A
Minimum VCO frequency
fVCOMIN CX = 0.022 F, VCOIN = open
400
Hz
Maximum VCO frequency
fVCOMAX CX = 0.022 F, VCOIN = 5 V
18.5
kHz
C1/C2 source current ratio
RSOURCE IC1SOURCE/IC2SOURCE
12
+12
%
C1/C2 sink current ratio
RSINK
IC1SINK/IC2SINK
12
+12
%
C1 source/sink current ratio
RC1
IC1SOURCE/IC1SINK
35
+15
%
C2 source/sink current ratio
RC2
IC2SOURCE/IC2SINK
35
+15
%
Thermal shutdown operating temperature
TTSD
*
150
180
210
C
Thermal shutdown hysteresis
TTSD
*
15
C
Electrical Characteristics
at Ta = 25C, V
CC
= V
CCL
= 12 V, V
REG
= 5 V
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Back EMF FG
Output on voltage
V
OL
0.4
V
Output off voltage
V
OH
4.5
V
PG amplifier
Input offset voltage
V
IO
8
+8
mV
Input bias current
I
BIN
250
nA
Common-mode input voltage range
V
ICOM
*
1
3.5
V
Open-loop gain
GVPG
f = 1 kHz
55
dB
Output on voltage
V
OL
0.4
V
Output off voltage
V
OH
4.5
V
Schmitt amplifier hysteresis
V
SHIS
70
93
115
mV
FG and PG Amplifier Block
at Ta = 25C, V
CC
= V
CCL
= 12 V, V
REG
= 5 V
Note: Items marked with an asterisk are design target values and are not tested.
Continued on next page.
No. 6185-3/9
LB1988N
Continued from preceding page.
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Input voltage
1 (HIGH)
V
IN
1
3.5
5
V
2 (LOW)
V
IN
2
0
0.8
V
Input current
I
IN
Sink, V
IN
= 3.5 V
30
50
A
Input hysteresis
VT
0.7
V
VSAT U-1
Vref = VS, between the output and VS
1.5
2.1
V
I
O
= 0.2 A, CW/CCW mode
VSAT L-1
Vref = VS, between the output and VS
0.2
0.3
V
Saturation voltage
I
O
= 0.2 A, CW/CCW mode
VSAT U-1'
Vref = VS, between the output and VS
1.6
2.2
V
I
O
= 0.4 A, CW/CCW mode
VSAT L-1'
Vref = VS, between the output and VS
0.3
0.5
V
I
O
= 0.4 A, CW/CCW mode
VSATU-1"
Vref = 8 V, between the output and ground
7.2
8.0
8.8
V
Upper side residual voltage
I
O
= 0.2 A, CW/CCW mode
VSATL-1"
Vref = 8 V, between the output and ground
7.2
8.0
8.8
V
I
O
= 0.4 A, CW/CCW mode
Output transistor leakage current
up
ILU
50
A
down
ILL
50
A
Diode forward voltage
up
VFU IF = 0.4 A
1.3
V
down VFL IF = 0.4 A
1.0
Control supply current
lref
5
2
A
Loading Block
at Ta = 25C, V
CC
= V
CCL
= 12 V, V
REG
= 5 V
No. 6185-4/9
LB1988N
Loading Motor Truth Table
Pin Assignment
Input
Output
Mode
XIN
YIN
XOUT
YOUT
L
L
Off
Off
Standby
H
L
H
L
Forward
L
H
L
H
Reverse
H
H
L
L
Brake
Pdmax -- Ta
75
-20
25
50
0
2.80
1.68
0
13
14
12
11
10
9
8
7
6
5
4
3
2
1
29
15
16
17
18
19
20
21
22
23
24
25
26
27
30
28
LB1988N
WOUT
UIN
MCOM
RF
GND
VREG
WIN
C1
CX
C2
VCOIN
PCOUT
YOUT
LGND
XOUT
XIN
LVCC
VREF
VIN
BFGO
PGOUT1
PGOUT2
PGIN+
PGIN-
VC
FC
VCC
VOUT
UOUT
Top view
YIN
Ambient temperature -- Ta [C]
Mounted on the specified printed circuit board
(114.3
76.1
1.6 mm
3
, glass epoxy)
Allowable power dissipation -- Pd [W]
Block Diagram
(Note that the values of the external components will vary with the motor actually used.)
No. 6185-5/9
LB1988N
VCO
PLL
VCC
MCOM
UOUT
VOUT
WOUT
RF
0.5
GND
CX
VCOIN
PCOUT
PGIN+
V
REG
1 k
200
0.
1
F
VC
FC
C2
C1
BFG
O
VREG
PGOUT1
PGOUT2
5 k
PGIN
200
200
XIN
YIN
LGND
YOUT
XOUT
LVCC
VREF
UIN
VIN
WIN
560 k
0.022
F
2200 pF
2200 pF
0.47
F
Thermal shutdown
circuit
Startup control
circuit
Mask circuit
Timing control
circuit
Rotor position
detection circuit
Soft switching
drive circuit
Divide-by-8
circuit
Upper side saturation prevention circuit
Output drive circuit
Output drive circuit
No. 6185-6/9
LB1988N
Pin Functions
Pin No.
Symbol
Voltage
Function
Equivalent circuit diagram
Frequency characteristics correction.
Insert a capacitor between this pin and ground to
prevent closed-loop oscillation in the current control
system.
1
FC
V
REG
1 k
10 k
5 k
1
Speed control.
This circuit implements a constant-current control
scheme in which current feedback from the RF pin is
applied.
2
VC
0 V to V
REG
40 k
27 k
24 k
V
CC
V
REG
50
F
50
F
2
200
Control system power supply.
This power supply must be stabilized to prevent
ripple or other noise entering the circuit.
3
VREG
4 V to 6 V
6
F
6
F
6
F
V
REG
5
200
200
4
10 k
10 k
6
30
F
60
F
38
38
5 k
V
REG
4
5 k
PG amplifier + input.
This input is biased at 1/2 VREG internally.
4
PGIN+
PG amplifier - input.
5
PGIN
PG amplifier linear output.
6
PGOUT1
Continued on next page.
No. 6185-7/9
LB1988N
Continued from preceding page.
Pin No.
Symbol
Voltage
Function
Equivalent circuit diagram
PG Schmitt amplifier output.
7
PGOUT2
7
100
A
5 k
VREG
8
VCC
VREG+VF
10
1 mA
30 k
50 k
1 mA
30 k
13 15
VCCL
Motor back EMF detection FG output (3-phase
synthesized).
8
BFGO
Loading motor driver output transistor power supply.
9
LVCC
8 to 13.8 V
Loading motor driver output voltage setting.
10
VREF
0 to V
CCL
11
100 k
50 k
V REG
50 k
12
2 k
2 k
13
15
9
14
10
Loading motor driver logic input.
11
XIN
0 V to V
REG
12
YIN
Loading motor driver output.
Loading motor driver output transistor ground.
13
XOUT
15
YOUT
14
LGND
Continued on next page.
No. 6185-8/9
LB1988N
Continued from preceding page.
Pin No.
Symbol
Voltage
Function
Equivalent circuit diagram
Drum motor driver output.
Lowest potential of the drum motor driver output
transistor.
Constant-current control is implemented by detecting
this voltage.
The current limiter also functions by detecting this
voltage.
16
UOUT
20
F
3.9
3.9
V
CC
16
18
17
22
20
23
24
30 k
30 k
10 k
VCC
200
23
24
22
19
200
200
2 k
16 17 18
10 k
1 k
V
REG
5
F
15
F
15
F
26
25
1/2V
REG
-VF
100
A
300
V
REG
27
17
VOUT
18
WOUT
20
RF
Internal reference voltage and power supply for the
drum motor driver output block and coil waveform
detection circuit.
21
VCC
8 to 13.8 V
Motor coil midpoint input.
This voltage is used as the reference voltage in coil
voltage waveform detection.
Coil waveform detection comparator inputs.
These are connected to each of the phase outputs
though internal 10-k
resistors.
Triangular waveform generator capacitor connection.
The triangular waveform generated using this pin is
used to implement soft switching for the coil output
waveforms.
The value of the capacitor connected between this
pin and ground in the VCO circuit determines the
operating frequency range and the minimum
operating frequency.
19
MCOM
22
UIN
23
VIN
24
WIN
25
C1
26
C2
27
CX
Continued on next page.
PS No. 6185-9/9
LB1988N
This catalog provides information as of July, 1999. Specifications and information herein are subject to
change without notice.
Continued from preceding page.
Pin No.
Symbol
Voltage
Function
Equivalent circuit diagram
VCO circuit control voltage input.
The PCOUT pin voltage is applied to this pin through
an RC filter.
28
VCOIN
50
A
50
A
50 k
V
REG
10 k
1.75 V
28
VCO circuit PLL output.
29
PCOUT
29
V
REG
Ground used for all circuits other than the drum and
loading motor driver output transistors.
30
GND
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.
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