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| 型号： | LV8105W |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 0.02 A, PQFP48 |
| 封装： | 7 X 7 MM, QFP-48 |
| 文件页数： | 9/21页 |
| 文件大小： | 202K |
| 代理商： | LV8105W |
LV8105W
No.A1271-17/21
Description of LV8105W
1. Speed control circuit
This IC controls the speed with a combination of the speed discriminator circuit and the PLL circuit. Therefore, when a
motor that has large load variation is used, it is possible to prevent the rotation variation as compared with the speed
control method only the speed discriminator. The speed discriminator circuit and the PLL circuit outputs an error signal
once every one FG period. The FG servo frequency signal (fFG) is controlled to have the equal frequency with the
clock signal (fCLK) which is input through the CLK pin.
fFG = fCLK
2. VCO circuit
This IC has the VCO circuit to generate the reference signal of the speed discriminator circuit. The reference signal
frequency is calculated as follows.
fVCO = fCLK × 512
fVCO : Reference signal frequency, fCLK : Clock signal frequency
The components connected to the R, C and FIL pins must be connected to the GND1 pin (pin 45) with a line that is as
short as possible to reduce influence of noise.
3. Output drive circuit
This IC adopts a direct PWM drive method to reduce power loss in the output. An external output transistor is always
saturated while the transistor is on and driving force of the motor is adjusted by changing the duty that the output
transistor is on. The waveform of the coil current becomes trapezoidal with the current control and the overlap
switching of about 15 degrees. Therefore, it is possible to reduce the motor noise and the torque ripple when switching
the phase to which power is applied (Soft current-carrying).
When the 120 degrees current-carrying, the PWM switching is performed on the UL, VL and WL pins only. Also,
when the soft current-carrying, the PWM switching is performed on any the outputs (the UL, VL, WL, UH, VH and
WH pins). The PWM frequency is determined with 64kHz (typical) in the IC.
When the PWM switching of the upper side output is off, the lower side output is turned on. Also, when the PWM
switching of the lower side output is off, the upper side output is turned on (Synchronous rectification). The off-time of
the synchronous rectification is determined in the IC and varies from 1.2
s to 3.1s.
4. Current limiter circuit
The current limiter circuit limits the (peak) current at the value I = VRF/Rf (VRF = 0.25V (typical), Rf : current
detection resistor). The current limitation operation consists of reducing the PWM output on-duty to suppress the
current.
High accuracy detection can be achieved by connecting the RF and RFGND pins lines near at the ends of the current
detection resistor (Rf).
5. Speed lock range
The speed lock range is less than
±6.25% of the fixes speed. When the motor speed is in the lock range, the LD pin (an
open collector output) goes low. If the motor speed goes out of the lock range, the on-duty of the motor drive output is
adjusted according to the speed error to control the motor speed to be within the lock range.
As for the 120 degrees current-carrying and the soft current-carrying, when the motor speed goes out of the lock range,
the current-carrying becomes the 120 degrees current-carrying. When the motor speed is within the lock range, the
current-carrying becomes the soft current-carrying.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LV8105W-MPB-E | 功能描述:马达/运动/点火控制器和驱动器 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 |
| LV8105W-TLM-E | 功能描述:马达/运动/点火控制器和驱动器 BRUSHLESS MOTOR 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 |
| LV810FI | 功能描述:IC CLK BUFF 1:10 133MHZ 20-SSOP RoHS:否 类别:集成电路 (IC) >> 时钟/计时 - 时钟缓冲器，驱动器 系列:- 标准包装:1 系列:HiPerClockS™ 类型:扇出缓冲器（分配），多路复用器 电路数:1 比率 - 输入:输出:2:18 差分 - 输入:输出:是/无 输入:CML，LVCMOS，LVPECL，LVTTL，SSTL 输出:LVCMOS，LVTTL 频率 - 最大:250MHz 电源电压:2.375 V ~ 3.465 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:32-LQFP 供应商设备封装:32-TQFP（7x7） 包装:- 其它名称:800-1923-6 |
| LV810FILF | 功能描述:时钟缓冲器 RoHS:否 制造商:Texas Instruments 输出端数量:5 最大输入频率:40 MHz 传播延迟（最大值）: 电源电压-最大:3.45 V 电源电压-最小:2.375 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LLP-24 封装:Reel |
| LV810FILFT | 功能描述:时钟驱动器及分配 RoHS:否 制造商:Micrel 乘法/除法因子:1:4 输出类型:Differential 最大输出频率:4.2 GHz 电源电压-最大: 电源电压-最小:5 V 最大工作温度:+ 85 C 封装 / 箱体:SOIC-8 封装:Reel |
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