LB1877V
No. 6200-1/7
LB1877V
Package Dimensions
unit: mm
3179A-SSOP20
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 LB1877V is a motor driver well suited for driving
motors of minicassette recorders, headphone stereos, and
microcasette recorders that use a 3V power supply.
80699RM(KI)
Ordering number : ENN6200A
Monolithic Digital IC
Brushless Motor Driver with Speed Control
for Portable Cassette Recorders
[LB1877V]
Overview
SANYO : SSOP20
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
I
O
max
0.5
A
Allowable power dissipation
Pd max
0.35
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
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.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
1
10
11
6.4
6.7
0.5
4.4
0.1
1.6max
1.0
20
0.65
0.22
0.43
0.15
LB1877V
No. 6200-2/7
Electrical Characteristics
at Ta = 25
C, V
CC
= 2.4V
Parameter
Symbol
Conditions
Ratings
Unit
Measurement
min
typ
max
circuit
Power supply current
I
CC
1
S/S pin High level
4.0
mA
1
I
CC
2
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
V
REF
Output current 0
A
0.8
0.9
1.0
V
11
Output current
I
REF
Output current 250
A
25 mV/250
A
12
Reference voltage to power supply
V
REF
/
V
CC
V
CC
1.8 to 5.0V
5
mV/V
13
voltage characteristics
Reference voltage to temperature
I
REF
/
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
I
COM
17
24
33
A
15
[LB pin]
Charge current
I
LB
4.5
6.5
9.0
A
16
[VSP pin]
Input voltage range
V
IN
V
CC
= 2.4V
0.15
1.8
V
17
Speed signal detection precision
V
SP
V
IN
= 1V
420
500
580
mV
18
Speed signal relative precision
R
SP
6
+6
%
Target
Speed signal to power supply
V
SP
/
V
CC
V
CC
1.8 to 5.0V
2.5
mV/V
19
voltage characteristics
Speed signal to temperature
V
SP
/
Ta
0.1
+0.2
mV/
C
Target
characteristics
[IN+ pin]
Input voltage range
V
IN
+
V
CC
= 2.4V
0.1
VCC 0.7
V
20
[OUT pin]
Output current
I
OUT
V
IN
+ = 1V
25
30
47.3
A
21
[RI pin]
Current detection precision
V
RI
RI = 10 k
U, V, Wout = 2.3V
10
20
35
mV
22
[U, V, WOUT pins]
Output saturation voltage
Vsat
I
O
= 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
0.35
0.6
0.8
10
0
20
40
60
80
100
Allowable power dissipation, Pd max W
Pd max Ta
Ambient temperature, Ta
C
LB1877V
No. 6200-3/7
Pin Description
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
1
2
3
4
5
6
7
8
VSP
VREF
IN+
RI
COM
OSC
S/S
GND
UB
OUT
FC
LB
VCC
DR
UOUT
VB
WB
WOUT
VOUT
PGND
9
10
12
11
LB1877V
Top view
LB1877V
No. 6200-4/7
Block Diagram
Startup
detection
Waveform
detection
Oscillator
Speed control
reference voltage
Reference
voltage
Power supply
bias
Speed detection
Current
detection
To control block
To various blocks
WB
VB
UB
0.1
F
0.1
F
0.1
F
VCC
UOUT
VOUT
WO
UT
GND
10k
3V
COM
Vc
c
FC
RI
OUT
0.47
F
0.1
F
1k
100k
Vs
p
IN
+
VREF
S/S
DR
LB
OS
C
P-GND
Forward/
reverse
TSD
0.047
F
0.23
F
* Constants given in the illustration are for reference only and are not guaranteed for all motors.
Individual adjustment for each motor is required.
+
Lockup
prevention
Transfer current
start logic
Predriver
LB1877V
No. 6200-5/7
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
Current feedback circuit
10k
200
10k 10k
10k
To U,V,WOUT
200
5k
14
10
15
13
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