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參數(shù)資料
| 型號(hào)： | LB1965M |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 1.5 A, PDSO14 |
| 封裝： | 0.225 INCH, MFP-14 |
| 文件頁數(shù)： | 4/6頁 |
| 文件大?。?/td> | 96K |
| 代理商： | LB1965M |
LB1965M
No.6189-4/6
Truth Table
IN+
IN-
Ct
Rt
RMI
CR
OUT1
OUT2
FG
H
L
H
L
H
L
H
L
Full speed
L
H
L
H
L
H
Full speed
H
L
H
L
H
L
Minimum speed
L
H
L
H
Minimum speed
L
H
L
H
Low speed
H
Lockup protection
Sample Application Circuit
VIN
Ct
Rth
RMI
IN
IN+
CR
OUT1
B1
OUT2
B2
FG
GND
H
D1
TH
10k
Ω
C3
C4
C1
0.47
μF
C2
0.022
μF
R1
390
Ω
R6
2k
Ω
R2
470k
Ω
R3
30k
Ω
R4
18k
Ω
R5
39k
Ω
12V
Noise absorption
Capacitor
0.01 to 0.47
μF
The above circuit is an example for ambient temperature based speed control using a thermistor.
The thermistor voltage (Rth pin voltage) is multiplied internally by 1.6 and compared to the voltage at the Ct pin. With
the above settings and at Ta = 25°C, the Rth pin voltage is interrupted for the interval t off as defined by the equation
below. At Ta = 45°C, because the Rth pin voltage
×1.6 becomes less than Vct (= 1.5V), there is no cut-off interval and
the motor is driven with a duty ratio of 100%. At low temperatures, the thermistor voltage (Rth
× 1.6) will rise, but
minimum rotation speed is maintained to a value defined by the RMI pin voltage. Therefore minimum rotation speed at
temperatures below Ta = 25°C is constant.
t =
C2×R2×ln(
VINVRth×1.6
VINVct
)
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