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参数资料
| 型号： | LB1971V |
| 元件分类： | 运动控制电子 |
| 英文描述： | DISK DRIVE MOTOR CONTROLLER, 0.7 A, PDSO24 |
| 封装： | 0.275 INCH, SSOP-24 |
| 文件页数： | 7/8页 |
| 文件大小： | 122K |
| 代理商： | LB1971V |
LB1971V
No.6214-7/8
5. Startup oscillator circuit (OSC pin)
This oscillator circuit creates the commutation logic timing required to start a sensorless motor.
A capacitor and a resistor are connected in parallel to ground. Use a high resistance of about 1.5M
for this resistor.
The value of the capacitor depends on the characteristics of the motor: select a value such that the time required to reach
the target speed is minimum and the variation in the startup time is as small as possible. If the capacitance is too large,
the variations in startup time will increase, and if it is too small the motor may be prevented from starting up normally.
6. CX oscillator circuit
This oscillator circuit creates the reference clock used for the sensorless motor logic system. Insert a capacitor to
ground. The oscillator frequency increases as the capacitance decreases. The oscillator frequency must be less than
60Hz. (The recommended capacitance is 470pF.)
7. FG output circuit
The FG output is created from the position detection information acquired from the back EMF waveform. This output
has a frequency three times that of the switching frequency. The output circuit is an open collector circuit. The output is
pulled up with a resistor.
Application Circuit Example 1 Portable CD Player (maximum speed: about 1000rpm)
16
15
14
13
20
19
18
17
24
23
22
21
1
VOUT
2
UOUT
3
STBY
4
BRK
5
V
CC
1
6
V
S
7
V
CC
2
8
FG
12
11
10
9
FC
DET
CSLP1
CSLP2
RF
WOUT
NC
FCOM
UIN
VIN
WIN
OSC
NC
CX
GND
LB1971V
+
47
F
+
1
F
20k
0.047
F
0.047
F
0.047
F
VS VCC FG
BRK
STBY
470pF
1.5M
0.47
F
4700pF
0.25
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LB1973JA | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Monolithic Digital IC Two-channel H-Bridge Driver |
| LB1973JA-AH | 功能描述:马达/运动/点火控制器和驱动器 2-ch H-bridge Step Motor Driver IC RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| LB1973JAGEVB | 功能描述:电源管理IC开发工具 EVM FOR LB1973JA RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| LB1973JA-ZH | 功能描述:马达/运动/点火控制器和驱动器 GP DC MOTOR DRIVER RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| LB1973M | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Two-channel H-Bridge Driver |
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