Ordering number : EN5974
O3098RM (OT) No. 5974-1/8
Overview
The LB1980H is a 3-phase brushless motor driver that is
particularly appropriate for VCR capstan motor drivers.
Functions
3-phase full-wave drive
Built-in torque ripple correction circuit (variable
correction ratio)
Current limiter circuit
Upper and lower side output stage over-saturation
prevention circuit that does not require external
capacitors.
FG amplifier
Thermal shutdown circuit
Package Dimensions
unit: mm
3233-HSOP28H
SANYO: HSOP28H
[LB1980H]
LB1980H
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Three-Phase Brushless Motor Driver
for VCR Capstan Motors
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.
Allowable power dissipation, Pdmax -- W
Ambient temperature, Ta -- C
Independent IC
Specifications
Absolute Maximum Ratings
at Ta = 25C
Allowable Operating Ranges
at Ta = 25C
Electrical Characteristics
at Ta = 25C, V
CC
= 5 V, V
S
= 15 V
Notes : 1. The torque ripple correction ratio is determined as follows from the Rf voltage waveform.
Continued on next page.
2. Parameters that are indicated as design target values in the conditions column are not tested.
No. 5974-2/8
LB1980H
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
CC
max
7
V
V
S
max
24
V
Maximum output current
I
O
max
1.3
A
Mounted on a 71.6
114.3
1.6 mm glass Epoxy printed
1.81
W
Allowable power dissipation
Pd max
circuit board
Independent device
0.77
W
Operating temperature
Topr
20 to + 75
C
Storage temperature
Tstg
55 to + 150
C
Parameter
Symbol
Conditions
Ratings
Unit
Supply voltage
V
S
5 to 22
V
V
CC
4.5 to 5.5
V
Hall input amplitude
V
HALL
Between the Hall inputs
30 to 80
mVo-p
GSENSE pin input range
V
GSENSE
With respect to the control system ground
0.20 to + 0.20
V
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
V
CC
supply current
I
CC
RL =
, V
CTL
= 0 V, V
LIM
= 0 V (Quiescent)
12
18
mA
[Outputs]
V
O
sat1
I
O
= 500 mA, Rf = 0.5
, Sink + Source
2.1
2.6
V
Output saturation voltage
V
CTL
= V
LIM
= 5 V (With saturation prevention)
V
O
sat2
I
O
= 1.0 A, Rf = 0.5
, Sink + Source
2.6
3.5
V
V
CTL
= V
LIM
= 5 V (With saturation prevention)
Output leakage current
I
O
leak
1.0
mA
[FR]
FR pin input threshold voltage
V
FSR
2.25
2.50
2.75
V
FR pin input bias current
I
B
(FSR)
5.0
A
[Control]
CTLREF pin voltage
V
CREF
2.05
2.15
2.25
V
CTLREF pin input range
V
CREFIN
1.50
3.50
V
CTL pin input bias current
I
B
(CTL)
With V
CTL
= 5 V and the CTLREF pin open
4.0
A
CTL pin control start voltage
V
CTL
(ST)
With Rf = 0.5
, V
LIM
= 5 V, I
O
10 mA,
2.00
2.15
2.30
V
Hall input logic fixed (U, V, W = H, H, L)
CTL pin control Gm
Gm (CTL)
With Rf = 0.5
,
I
O
= 200 mA,
0.46
0.58
0.70
A/V
Hall input logic fixed (U, V, W = H, H, L)
[Current Limiter]
LIM current limit offset voltage
Voff (LIM)
With Rf = 0.5
, V
CTL
= 5 V, I
O
10 mA,
140
200
260
mV
Hall input logic fixed (U, V, W = H, H, L)
LIM pin input bias current
I
B
(LIM)
With V
CTL
= 5 V and the V
CREF
pin open
2.5
A
LIM pin current control level
I
LIM
With Rf = 0.5
, V
CTL
= 5 V, V
LIM
= 2.06 V,
830
900
970
mA
Hall input logic fixed (U, V, W = H, H, L)
[Hall Amplifier]
Hall amplifier input offset voltage
Voff (HALL)
6
+6
mV
Hall amplifier input bias current
I
B
(HALL)
1.0
3.0
A
Hall amplifier common-mode input voltage range
V
CM
(HALL)
1.3
3.3
V
[TRC]
For the high and low peaks in the
Torque ripple correction ratio
TRC
Rf waveform when I
O
= 200 mA.
9
%
(Rf = 0.5
, with the ADJ pin open)
*
1
ADJ pin voltage
V
ADJ
2.37
2.50
2.63
V
[FG Amplifier]
FG amplifier input offset voltage
Voff (FG)
8
+8
mV
FG amplifier input bias current
I
B
(FG)
100
nA
FG amplifier output saturation voltage
V
O
sat (FG)
Sink side, for the load provided by the
0.5
V
internal pull-up resistor
FG amplifier voltage gain
V
G
(FG)
For the open loop state with f = 10 kHz
41.5
44.5
47.5
dB
FG amplifier common-mode input voltage
V
GM
(FG)
0.5
4.0
V
Continued from preceding page.
Notes : 1. The torque ripple correction ratio is determined as follows from the Rf voltage waveform.
2. Parameters that are indicated as design target values in the conditions column are not tested.
Truth Table and Control Functions
No. 5974-3/8
LB1980H
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
[Saturation]
Saturation prevention circuit lower
The voltages between each OUT and
side voltage setting
V
O
sat (DET)
Rf pair when I
O
= 10 mA, Rf = 0.5
, and
0.175
0.25
0.325
V
V
CTL
= V
LIM
= 5 V
[TSD]
TSD operating temperature
TSD
Design target value
*
2
180
C
Hysteresis width
TSD
Design target value
*
2
20
C
Correction ratio =
2
(V
p
V
b
)
100
(%)
V
p
V
b
For each Hall logic setting
Ground level
Source
Sink
Hall input
FR
U
V
W
1
Phase V
Phase W
H
H
L
H
Phase W
Phase V
L
2
Phase U
Phase W
H
L
L
H
Phase W
Phase U
L
3
Phase U
Phase V
H
L
H
H
Phase V
Phase U
L
4
Phase W
Phase V
L
L
H
H
Phase V
Phase W
L
5
Phase W
Phase U
L
H
H
H
Phase U
Phase W
L
6
Phase V
Phase U
L
H
L
H
Phase U
Phase V
L
Note: In the FR column, "H" refers to a voltage of 2.75 V or higher, and "L" refers
to 2.25 V or lower (when V
CC
= 5 V.)
Note: In the Hall input column, "H" refers to the state in the corresponding phase
where the + input is at a potential at least 0.01 V higher than the input,
and "L" refers to the state where the input is at a potential at least 0.01 V
higher than the + input.
Note: Since the drive technique adopted is a 180 technique, phases
other than the sink and source phase do not turn off.
Control Function and Current Limiter Function
Control Characteristics
Control Limiter Characteristics
Slope: 0.50 A/V (typical)
I
OUT
I
OUT
Pin Descriptions
Pin No.
Pin
Function
Equivalent circuit
Used for external adjustment of the torque ripple correction
ratio. Apply a voltage externally with a low-impedance circuit
to the ADJ pin to adjust the correction ratio. The correction
ratio falls as the applied voltage is increased, and increases
as the applied voltage decreases. The torque ripple
correction ratio can be modified by factors in the range 0 to 2
times the ratio that applies when his pin is left open.
(The pin voltage is set to about V
CC
/2 internally, and the
input impedance is about 5 k
.)
23
ADJ
Output block power supply
Output current detection. The control block current limiter
operates using the resistor Rf connected between these pins
and ground. Also, the lower side saturation prevention circuit
and the torque ripple correction circuit operate based on the
voltages across this resistor. It is especially important to note
that, since the saturation prevention level is set using this
voltage, the lower side saturation prevention circuit will
become less effective in the high current region if the value of
Rf is lowered excessively. Also, the PWR and SENSE pins
must be connected together.
U phase output
V phase output
(Spark killer diodes are built-in.)
W phase output
No. 5974-4/8
LB1980H
27
28
1
U
OUT
V
OUT
W
OUT
4
24
Rf (SENSE)
Rf (PWR)
22
V
S
Ground sensing. The influence of the common ground
impedance on Rf can be excluded by connecting this pin to
nearest ground for the Rf resistor side of the motor ground
wiring that includes Rf. (This pin must not be left open.)
5
GSENSE
Forward/reverse selection. The voltage applied to this pin
selects the motor direction (forward or reverse).
(Vth = 2.5 V at V
CC
= 5 V (typical))
6
FR
Ground for all circuits other than the output transistors. The
lowest potential of the output transistors is that of the Rf pin.
7
GND
Input used when the FG amplifier is used as an inverting
input. A feedback resistor must be connected between
FG
OUT
and this pin.
8
FG
IN
+
Noninverting input used when the FG amplifier is used as a
differential input amplifier. No bias is applied internally.
9
FG
IN
FG amplifier output. There is an internal resistive load.
10
FG
OUT
Speed control loop frequency characteristics correction.
14
FC
Continued on next page.
OUT
Lower side saturation
prevention circuit input block
Continued from preceeding page.
Pin Assignment
Pin No.
Pin
Function
Equivalent circuit
Control reference voltage. While this pin is set to about
0.43
V
CC
internally, this voltage can be modified by
applying a voltage from a low-impedance circuit.
(The input impedance is about 4.3 k
).
CTLREF
12
CTL
Speed control input. The control implemented is fixed current
drive controlled by current feedback from Rf.
Gm = 0.58/V (typical) when Rf = 0.5
11
LIM
Current limiter function control. The output current can be
varied linearly by applying a voltage to this pin.
The slope is 0.5 A/V (typical) when Rf = 0.5
.
13
V
CC
Power supply for all internal blocks other than the output
block. This voltage must be stabilized so that noise and ripple
do not enter the IC.
21
U
IN
+
U
IN
V
IN
+
V
IN
W
IN
+
W
IN
U phase Hall element inputs.
Logic high is defined as states where IN+ > IN
.
V phase Hall element inputs.
Logic high is defined as states where IN+ > IN
.
W phase Hall element inputs.
Logic high is defined as states where IN+ > IN
.
15
16
17
18
19
20
No. 5974-5/8
LB1980H
PDF 
ZIP