Page 1
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 = 25°C
Note: * Specified printed circuit board: 114.3 × 76.1 × 1.6 mm3, glass epoxy
Page 2
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 = 25°C
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
1IO= 0.4 A, source + sink 1.4 2.0 V
Output saturation voltage 2 V
OSAT
2IO= 0.8 A, source + sink 1.8 2.6 V
MC pin common-mode input voltage range V
IC
0V
CC
– 2 V
VC pin input bias current I
VC
VC = 0 V –2 –1 µA
Control start voltage VTHVC V
RF
= 10 mV 2.4 2.5 2.6 V
Closed loop control gain GMVC RF = 0.5 Ω 0.75 0.95 1.15 A/V
PCOUT output current 1 I
PCOU
Source side –90 µA
PCOUT output current 2 I
PCOD
Sink side 90 µA
VCOIN input current I
VCOIN
VCOIN = 5 V 0.1 0.2 µA
Minimum VCO frequency fVCOMIN CX = 0.022 µF, VCOIN = open 400 Hz
Maximum VCO frequency fVCOMAX CX = 0.022 µF, 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 = 25°C, VCC= 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 = 25°C, VCC= 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.
Page 3
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, VIN= 3.5 V 30 50 µA
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
IO= 0.4 A, CW/CCW mode
VSAT L-1’
Vref = VS, between the output and VS
0.3 0.5 V
IO= 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
IO= 0.4 A, CW/CCW mode
Output transistor leakage current
up ILU 50 µA
down
ILL 50 µA
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 µA
Loading Block at Ta = 25°C, VCC= V
CCL
= 12 V, V
REG
= 5 V
Page 4
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
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]
Pdmax — Ta
2.80
1.68
0
75-20 25 500
FC
VC
VREG
PGIN+
PGIN-
PGOUT1
PGOUT2
LVCC
VREF
XIN
YIN
XOUT
LGND
10
11
12
13
14
1
2
3
4
5
6
7
8
9
LB1988N
30
29
28
27
26
25
24
23
22
21
20
19
18
17
GND
PCOUT
VCOIN
CX
C2
C1
WIN
VINBFGO
UIN
VCC
RF
MCOM
WOUT
VOUT
YOUT
15
16
UOUT
Top view
Page 5
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 Ω
GND
CX
VCOIN
PCOUT
PGIN+
VREG
1 kΩ
200 Ω
0.1 µF
VC
FC
C2
C1
BFGO
VREG
PGOUT1 PGOUT2
5 kΩ
PGIN–
200 Ω 200 Ω
XIN YIN
LGND
YOUTXOUT
LVCC
VREF
UIN
VIN
WIN
560 kΩ
0.022 µF
2200 pF
2200 pF
0.47 µF
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
Page 6
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.
1FC
1 kΩ
1
Speed control.
This circuit implements a constant-current control
scheme in which current feedback from the RF pin is
applied.
2VC
0 V to V
REG
VCC
50 µF50 µF
200 Ω
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 µF6 µF6 µF
V
REG
5
200 Ω
200 Ω
4
10 kΩ
10 kΩ
6
30
µF
60
µF
38 Ω
38 Ω
5 kΩ
4
5 kΩ
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.
V
REG
10 kΩ 5 kΩ
VREG
27 kΩ
2
40 k
24 kΩ
REG
V
Page 7
No. 6185-7/9
LB1988N
Continued from preceding page.
Pin No. Symbol Voltage Function Equivalent circuit diagram
PG Schmitt amplifier output.7 PGOUT2
100 µA
5 kΩ
VREG
8
VCC
VREG+VF
1 mA
30 kΩ
50 kΩ
1 mA
30 kΩ
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
100 kΩ
50 kΩ
VREG
50 kΩ
2 kΩ
2 kΩ
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.
7
13 15
10
11
12
Page 8
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
µ
3.9 Ω
3.9 Ω
16
18
17
22
20
23
24
30 kΩ
30 kΩ
10 kΩ
VCC
200
Ω
23
24
22
19
200 Ω
200 Ω
2 kΩ
16 17 18
10 kΩ
1 kΩ
5 µF
15
µF
15
µF
1/2VREG
-VF
100 µA
300 Ω
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-kΩ 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.
V
CC
20
F
25
26
REG
V
V
REG
Page 9
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
µA
50
µA
50 kΩ
V
REG
10 kΩ
1.75 V
28
VCO circuit PLL output.29 PCOUT
9
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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