LB1877M
No. 6199-1/7
LB1877M
Package Dimensions
unit: mm
3036B-MFP20
Functions and Features
Brushless sensorless motor drive (3-phase half-wave drive)
Forward/reverse drive possible
Built-in speed control function (voltage servo)
Built-in reference voltage (0.9V)
Soft switching
The LB1877M is a motor driver well suited for driving
motors of minicassette recorders, headphone stereos, and
microcasette recorders that use a 3V power supply.
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.
63099RM(KI)
Ordering number : EN6199A
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Monolithic Digital IC
Brushless Motor Driver with Speed Control
for Portable Cassette Recorders
[LB1877M]
Overview
1
20
10
11
12.6
0.15
1.27
0.35
0.59
1.8 max
1.5
0.1
5.4
0.625
6.35
7.6
SANYO : MFP20
Specifications
Absolute Maximum Ratings
at Ta = 25
C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
CC
max
6.0
V
Maximum output current
IO max
0.5
A
Allowable power dissipation
Pd max
0.5
W
Operating temperature
Topr
10 to +80
C
Storage temperature
Tstg
40 to +150
C
Allowable Operating Ranges
at Ta = 25
C
Parameter
Symbol
Conditions
Ratings
Unit
Power supply voltage
V
CC
1.8 to 5.0
V
LB1877M
No. 6199-2/7
Electrical Characteristics
at Ta = 25
C, V
CC
= 2.4V
Parameter
Symbol
Conditions
Ratings
Unit
Measurement
min
typ
max
circuit
Power supply current
ICC1
S/S pin High level
4.0
mA
1
ICC2
S/S pin Low level (standby)
20
A
2
[S/S pin]
S/S pin High level
SSH
Start
1.5
V
CC
V
3
S/S pin Low level
SSL
Stop
0
0.3
V
4
[DR pin]
DR pin High level
DRH
Reverse
1.5
V
CC
V
9
DR pin Low level
DRL
Normal direction
0
0.3
V
10
[Internal reference voltage]
Internal reference voltage
VREF
Output current 0
A
0.8
0.9
1.0
V
11
Output current
IREF
Output current 250
A
25 mV/250
A
12
Reference voltage to power supply
VREF/
V
CC
V
CC
= 1.8 to 5.0V
5
mV/V
13
voltage characteristics
Reference voltage to temperature
IREF/
Ta V
CC
= 2.4V
0.1
0.3
mV/
C
Target
characteristics
[OSC pin]
Charge current
Isc
3.0
4.5
6.0
A
14
[COM pin]
Sink current
ICOM
17
24
33
A
15
[LB pin]
Charge current
ILB
4.5
6.5
9.0
A
16
[VSP pin]
Input voltage range
VIN
V
CC
= 2.4V
0.15
1.8
V
17
Speed signal detection precision
VSP
VIN = 1V
420
500
580
mV
18
Speed signal relative precision
RSP
6
6
%
Target
Speed signal to power supply
VSP/
V
CC
V
CC
= 1.8 to 5.0V
2.5
mV/V
19
voltage characteristics
Speed signal to temperature
VSP/
Ta
0.1
0.2
mV/
C
Target
characteristics
[IN+ pin]
Input voltage range
VIN+
V
CC
= 2.4V
0.1
V
CC
0.7
V
20
[OUT pin]
Output current
IOUT
VIN+ = 1V
25
30
47.3
A
21
[RI pin]
Current detection precision
VRI
RI = 10 k
U, V, Wout = 2.3V
10
20
35
mV
22
[U, V, WOUT pins]
Output saturation voltage
Vsat
IO = 200 mA
0.25
V
23
[Thermal]
Thermal protection trigger temperature
TTSD
180
C
Target
Temperature hysteresis width
TTSD
15
C
Target
Note: Items shown to be Target are not measured.
0
0.2
0.4
0.5
0.6
0.8
0
20
40
60
80
100
10
Allowable power dissipation, Pd max W
Pd max Ta
Ambient temperature, Ta
C
LB1877M
No. 6199-3/7
Pin Function
Pin number Pin name
Function
20
UOUT
U-phase output
1
VOUT
V-phase output
2
WOUT
W-phase output
6
UB
U-phase base of 3-phase differential
5
VB
V-phase base of 3-phase differential
4
WB
W-phase base of 3-phase differential
18
VCC
Power supply
7
OSC
Startup oscillator pin
8
COM
Output waveform detection comparator voltage
3
P GND
Output transistor and predriver ground
9
GND
Ground pin
11
S/S
Start/stop pin
19
DR
Forward/reverse pin
12
VREF
Reference voltage 0.9V
14
VSP
Output waveform peak detection pin
13
IN+
Error amp non-inverted pin
15
OUT
Error amp output pin
10
RI
Current feedback resistor connection pin
16
FC
Frequency response adjustment pin
17
LB
Motor start lockup prevention. Connect to GND via capacitor
Pin Assignment
20
19
18
17
16
15
14
13
12
11
RI
COM
OSC
GND
UB
VSP
VREF
IN+
S/S
OUT
FC
LB
VCC
DR
UOUT
LB1877M
VB
WB
WOUT
VOUT
PGND
1
2
3
4
5
6
7
8
9
10
Top view
LB1877M
No. 6199-4/7
Block Diagram
+
WB
VB
UB
V
CC
UOUT
VOUT
WOUT
GND
3V
COM
V
CC
FC
RI
OUT
Vsp
IN+
VREF
S/S
DR
LB
0.047
F
OSC
PGND
TSD
0.22
F
0.47
F
0.1
F
1k
100k
10k
0.1
F0
.
1
F
0.1
F
Predriver
Lockup
prevention
Waveform
detection
Transfer current
start logic
Forward/
reverse
Startup
detection
Oscillator
Speed control
reference voltage
Reference
voltage
Power supply
bias
* Constants given in the illustration are for reference only and are not guaranteed for all motors.
Individual adjustment for each motor is required.
Speed detection
Current
detection
To various blocks
To control block
LB1877M
No. 6199-5/7
Pin number
18
9
12
7
8
14
13
15
10
Pin Description
Unit (resistance:
, capacitance: F)
Pin name
VCC
GND
VREF
OSC
COM
VSP
IN+
OUT
RI
Pin voltage
1.8V to 5.0V
0.7V to 0.9V
1V to Vcc
1.3V to Vcc
0.1V to
Vcc 0.7V
Equivalent circuit
Pin function
Power supply for all circuits
Ground for all circuits except
FC and power block.
Internal reference voltage.
Connected as speed control
voltage to IN+ pin via external
resistor.
Startup oscillator pin.
Adjusts self-excitation
frequency via external
capacitor.
Determines threshold voltage
of waveform detection circuit.
Connected to Vcc via an
external resistor.
Varies the startup threshold
voltage.
Peak detection circuit output
pin.
Error amplifier non-inverted
pin.
Controls rotation speed via
input pin voltage.
Error amplifier output pin.
Connect external resistor
between Vsp pins for
feedback.
Current feedback output pin.
Connect external resistor
between this pin and ground
for current feedback
adjustment.
Continued on next page
12
50k
200
7
To WOUT
To VOUT
To UOUT
To comparator input
20k
20k
20k
1k
20k
10k
8
Drive
current
I
10k
200
10k 10k 10k
200
5k
14
10
15
13
To U,V,WOUT
Current feedback circuit
LB1877M
No. 6199-6/7
Pin number
16
11
19
20
1
2
17
3
Continued from preceding page
Unit (resistance:
, capacitance: F)
Pin name
FC
S/S
DR
UOUT
VOUT
WOUT
LB
P GND
Pin voltage
Voltage
input not
allowed
0 to Vcc
0 to Vcc
0 to 8V
0 to 1V
Equivalent circuit
Pin function
Frequency characteristics
adjustment pin.
Connect to ground via
capacitor.
Start/stop pin.
Forward/reverse rotation pin.
U, V, W phase output pins.
Connect to motor coils
Motor start lockup prevention.
Power block ground.
Continued on next page
80k
50k
50k
11
50k
50k
19
100k
20 1
2
200
17
6k
To RI pin
Drive current
3S
16
2k
LB1877M
No. 6199-7/7
This catalog provides information as of June, 1999. Specifications and information herein are subject to change
without notice.
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.
PS
Pin number
4
5
6
Continued from preceding page
Pin name
WB
VB
UB
Pin voltage
Voltage
input not
allowed
Equivalent circuit
Pin function
Base pins for U, V, W
differential.
Connect to ground via
capacitor for soft switching
4
5
6
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