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| 型号： | LB11693 |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 1.8 A, PDFM28 |
| 封装： | 0.500 INCH, DIP-28 |
| 文件页数： | 2/12页 |
| 文件大小： | 129K |
| 代理商： | LB11693 |
No.8095-10/12
LB11693
Functional Description
1. Output Drive Circuit
This IC reduces motor vibration and noise by smoothly switching the output current when switching phases. Since
control of the change (slope) in the output current during phase switching uses the slope of the Hall sensor input
waveform, if the slope of the Hall sensor input waveform is too steep, the changes in the output current during phase
switching will also be too steep. This will reduce the noise and vibration minimizing effect of this design. Thus care is
required with regard to the slope of the Hall sensor input waveform.
Motor speed control is implemented by PWM switching of the low side output transistor. The drive output is adjusted
by changing the duty. The LB11693 includes the diode between OUT and VM used for the regenerative current when
the PWM signal is off.
When the slope (amplitude) of the Hall sensor input waveform is large, if the circuit is used with a large current, the
parasitic diode between OUT and ground will operate due to the low side kickback during phase switching. If waveform
disruptions or other problems occur, add an external rectifying diode or Schottky diode between OUT and ground.
2. Power Supply Stabilization
Since this IC uses a PWM switching technique, the power supply line level can be disturbed easily. Electrolytic
capacitors with adequate capacitance to stabilize the power supply lines must be inserted between VCC and ground. The
power supply lines will be especially subject to disturbance if diodes are inserted in the power supply lines to prevent
damage if the power supply is connected with reversed polarity. Here, even larger capacitances should be used. The
connected electrolytic capacitors must be placed as close to the IC pins (VCC, VM, and the two ground pins) as
possible. If the heat sink or some other obstacle prevents the electrolytic capacitors from being connected close to the
IC, ceramic capacitors with a capacitance of about 0.1 F must be connected near the pins.
3. VREG Pin
The VREG pin is both the 5 V regulator output and the power supply for the IC’s internal control circuits. Therefore, a
capacitor with a capacitance of at least 0.1 F must be connected between VREG and ground. The ground side of the
connected capacitor must be connected to the GND1 pin with a line that is as short as possible.
4. FC Pin
The capacitor connected to the FC pin is required to correct the control loop frequency characteristics. (Use a value of
about 0.1 F.)
5. VD Pin
The VD pin supplies the low side output transistor drive current (about 0.1 A, maximum).
The IC internal power consumption can be suppressed by connecting a resistor between the VCC and VD pins to divide
the power consumption due to the low side transistor drive current. The IC internal power consumption due to the drive
current can be made smaller to the extent the VD pin voltage is lowered. However, a voltage of 4 V or higher must be
assured for the VD pin voltage. When used with VCC = 24 V, insert a resistor of between 50 (0.5 W) and 100 (1
W) between the VCC and VD pins.
6. Hall Input Signals
A signal input with an amplitude (differential) of 50 mVp-p or higher is required for the Hall inputs. If disturbances in
the output waveform occur due to noise, capacitors must be connected across the Hall input pins (the + and – sides).
7. Current Limiter Circuit
The current limiter circuit limits the output current peak value to a level determined by the equation I = VRF/Rf (VRF =
0.5 V typical, Rf: current detection resistor). This circuit limits the current by controlling the low side output transistor
PWM at the PWM frequency determined by the PWM pin external capacitor. In particular, it reduces the on duty of the
PWM signal.
8. Forward/Reverse Direction Switching
This IC is designed with the assumption that the motor direction (forward or reverse) will not be switched while the
motor is turning. We recommend operating this IC with the F/R pin held fixed at either the low or high level. When this
pin is left open, the internal pull-up resistor (about 40 k
) will set the pin to the high level. However, if there are large
fluctuations in signal levels in the circuit, this pull-up resistor should be strengthened by adding an external resistor.
If a direction switching operation is performed while the motor is turning, large currents will flow due to the braking
operation. However, this IC’s current limiter circuit cannot limit these braking currents. Thus direction switching is only
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LB11693H | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Monolithic Digital IC 3-Phase Brushless Motor Driver for 24V Fan Motors |
| LB11693H-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 |
| LB11693H-TLM-E | 功能描述:马达/运动/点火控制器和驱动器 BRUSHLESS 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 |
| LB11693H-TRM-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 |
| LB11693JH | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Monolithic Digital IC 24V Fan Motor Driver IC |
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