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| 型號： | LB1987M |
| 元件分類： | 運動控制電子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 1.3 A, PDSO36 |
| 封裝： | MFP-36 |
| 文件頁數(shù)： | 11/17頁 |
| 文件大?。?/td> | 274K |
| 代理商： | LB1987M |
No. 6109-3/17
LB1987, 1987D, 1987M, 1987H
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.
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
[Saturation Prevention]
Saturation prevention circuit
Vosat(DET)
IO = 10 mA, Rf = 0.5 Ω,
0.175
0.25
0.325
V
lower side voltage setting
VCTL = LVIM = 5 V, The voltage between each OUT and Rf.
[Schmitt Amplifier]
Duty ratio
DUTY
Under the specified conditions
47
50
53
%
Upper side output saturation voltage Vsatu(SH)
4.8
V
Lower side output saturation voltage Vsatd(SH)
0.2
V
Hysteresis
Vhys
32
50
60
mV
Thermal shutdown operating
T-TSD
*
170
°C
temperature
12
3
4
5
6
Vp
Vb
GND level
A12204
Hall Logic Settings
2 (Vp – Vb)
Correction ratio = ——————— 100 (%)
Vp + Vb
Truth Table and Control Functions
Source → sink
Hall input
FR
UV
W
1
V → W
HH
L
H
W → VL
2
U → W
HL
L
H
W → UL
3
U → V
HLH
H
V → UL
4
W → V
LL
H
V → WL
5
W → U
LH
H
U → WL
6
V → U
LHL
H
U → VL
Note: 1. The “H” state for FR means a voltage of 2.75 V or higher, and the “L”
state means a voltage of 2.25 V or lower. (When VCC = 5 V.)
2. For the Hall inputs, the input “H” state means the state in which the
(+) 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.
3. Since this drive technique is a 180° power application technique, the
phase that is neither the source phase nor the sink phase does not
turn completely off.
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