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参数资料
| 型号： | LB11696V |
| 厂商： | SANYO SEMICONDUCTOR CO LTD |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 0.03 A, PDSO30 |
| 封装： | 0.275 INCH, SSOP-30 |
| 文件页数： | 5/16页 |
| 文件大小： | 394K |
| 代理商： | LB11696V |
No.8087-13/16
LB11696V
LB11696V Functional Description
1. Output Drive Circuit
The LB11696V adopts direct PWM drive to minimize power loss in the outputs. The output transistors are always
saturated when on, and the motor drive power is adjusted by changing the on duty of the output. The output PWM
switching is performed on the UH, VH, and WH outputs. Since the UL to WL and UH to WH outputs have the same
output form, applications can select either low side PWM or high side PWM drive by changing the way the external
output transistors are connected. Since the reverse recovery time of the diodes connected to the non-PWM side of
the outputs is a problem, these devices must be selected with care. (This is because through currents will flow at the
instant the PWM side transistors turn on if diodes with a short reverse recovery time are not used.)
2. Current Limiter Circuit
The current limiter circuit limits the output current peak value to a level
determined by the equation I = VFR/Rf (VRF = 0.25 V typical, Rf:
current detection resistor). This circuit suppresses the output current by
reducing the output on duty.
High-precision detection can be implemented by connecting the lines
from the RF and RFGND pins close to the two terminal of the current
detection resistor Rf.
The current limiter circuit includes an internal filter circuit to prevent incorrect current limiter circuit operation due
to detecting the output diode reverse recovery current due to PWM operation. Although there should be no problems
with the internal filter circuit in normal applications, applications should add an external filter circuit (such as an RC
low-pass filter) if incorrect operation occurs (if the diode reverse recovery current flows for longer than
1 s).
3. Power Saving Circuit
This IC goes to a low-power mode (power saving state) when set to the
stop state with the S/S pin. In the power saving state, the bias currents in
most of the circuits are cut off. However, the 5 V regulator output
(VREG) is still provided in the power saving state. If it is also necessary
to cut the Hall device bias current, this function can be provided by an
application that, for example, connects the Hall devices to 5 V through
PNP transistors.
4. Notes on the PWM Frequency
The PWM frequency is determined by the capacitor C (F) connected to the PWM pin.
fPWM ≈ 1/(22500 × C)
If a 2000 pF capacitor is used, the circuit will oscillate at about 22 kHz. If the PWM frequency is too low, switching
noise will be audible from the motor, and if it is too high, the output power loss will increase. Thus a frequency in
the range 15 to 50 kHz must be used. The capacitor's ground terminal must be placed as close as possible to the IC’s
ground pin to minimize the influence of output noise and other noise sources.
5. Control Methods
The output duty can be controlled by either of the following methods
Control based on comparing the TOC pin voltage to the PWM oscillator waveform
The low side output transistor duty is determined according to the result of comparing the TOC pin voltage to the
PWM oscillator waveform. When the TOC pin voltage is 1.35 V or lower, the duty will be 0%, and when it is 3.0
V or higher, the duty will be 100%.
Since the TOC pin is the output of the control amplifier (CTL), a control voltage cannot be directly input to the
TOC pin. Normally, the control amplifier is used as a full feedback amplifier (with the EI- pin connected to the
TOC pin) and a DC voltage is input to the EI+ pin (the EI+ pin voltage will become equal to the TOC pin voltage).
When the EI+ pin voltage becomes higher, the output duty increases. Since the motor will be driven when the EI+
pin is in the open state, a pull-down resistor must be connected to the EI+ pin if the motor should not operate when
EI+ is open.
When TOC pin voltage control is used, a low-level input must be applied to the PWMIN pin or that pin connected
to ground.
To the RF pin
Current
detection
resistor
To the VREG pin
To the S/S pin
Hall
device
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LB11696V-D | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Direct PWM Drive Brushless Motor Predriver IC |
| LB11696VGEVB | 功能描述:电源管理IC开发工具 EVM FOR LB11696V 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 |
| LB11696V-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 |
| LB11696V-TLM-E | 功能描述:马达/运动/点火控制器和驱动器 PWM MOTOR PREDRIVER 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 |
| LB11696V-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 |
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