LB1987H SANYO [Sanyo Semicon Device], LB1987H Datasheet - Page 3

• Manufacturer Part Number: LB1987H
• Description: Three-Phase Brushless Motor Driver for VCR Capstan Motors
• Manufacturer: SANYO [Sanyo Semicon Device]

Continued from preceding page.
Note: * Items marked with an asterisk are design target values and are not measured.
Note: 1. The torque ripple correction ratio is determined from the Rf voltage waveform as shown below.
Correction ratio = ——————— 100 · (%)
Truth Table and Control Functions
[Saturation Prevention]
[Schmitt Amplifier]
1
2
3
4
5
6
Saturation prevention circuit
lower side voltage setting
Duty ratio
Upper side output saturation voltage Vsatu(SH)
Lower side output saturation voltage Vsatd(SH)
Hysteresis
Thermal shutdown operating
temperature
Source
V
W
U
W
W
V
W
U
U
V
V
U
Parameter
W
W
W
W
U
U
V
V
V
U
V
U
sink
2 · (Vp – Vb)
Vp + Vb
U
H
H
H
L
L
L
Hall input
Vosat(DET)
1
Symbol
T-TSD
DUTY
V
H
H
H
L
L
L
Vhys
W
H
H
H
L
L
L
I
V
Under the specified conditions
*
O
2
CTL
= 10 mA, Rf = 0.5 Ω,
LB1987, 1987D, 1987M, 1987H
= L
FR
H
H
H
H
H
H
L
L
L
L
L
L
VIM
Hall Logic Settings
= 5 V, The voltage between each OUT and Rf.
3
Note: 1. The “H” state for FR means a voltage of 2.75 V or higher, and the “L”
Conditions
4
2. For the Hall inputs, the input “H” state means the state in which the
3. Since this drive technique is a 180° power application technique, the
state means a voltage of 2.25 V or lower. (When V
(+) input for that phase is at least 0.01 V higher than the (–) input for
that phase. Similarly, the “L” state means the state in which the (+)
input for that phase is at least 0.01 V lower than the (–) input for that
phase.
phase that is neither the source phase nor the sink phase does not
turn completely off.
5
6
0.175
min
Vp
4.8
GND level
Vb
47
32
Ratings
typ
A12204
0.25
CC
170
50
50
= 5 V.)
max
0.325
0.2
No. 6109-3/17
60
53
Unit
mV
°C
%
V
V
V