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参数资料
| 型号： | BD6718FV-E2 |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 0.02 A, PDSO20 |
| 封装： | ROHS COMPLIANT, SSOP-20 |
| 文件页数： | 14/34页 |
| 文件大小： | 1916K |
| 代理商： | BD6718FV-E2 |
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Description of operations
Function table
Reference
BD6709FS
BD6718FV
BD6721FS
BD6722FS
page
DC input
〇
P.21,22
Variable speed control
PWM input
〇
P.23
Current limit
〇
P.24
Lock protection and automatic restart
〇
P.25,26
Output Tr simultaneous ON preventing
circuit
〇
P.26
High voltage application
〇
P.27
PWM soft switching
〇
P.29
Soft start
〇
P.30
1) Variable speed operation
Rotating speed changes by PWM ON-DUTY on the upper output.
PWM operation enables
a) PWM operation by DC input (Method by self-oscillation connecting a capacitor to COSC terminal)
b) PWM operation by pulse input (Method to change duty by inputting pulse directly to COSC terminal)
a) PWM operation by DC input
As shown in Fig.73, DC voltage input from LAOUT(BD6709FS, BD6721FS), or DC voltage input from VTH(BD6718FV,
BD6722FS)are compared with triangle wave produced by charging and discharging current to the capacitor connected
to COSC to change ON-DUTY.
Output is ON when COSC terminal voltage＞VTH terminal voltage or LAOUT terminal voltage
Output is OFF when COSC terminal voltage＜VTH terminal voltage of LAOUT terminal voltage
VMIN terminal is for setting the minimum rotating speed. ON-DUTY is determined by either VTH terminal voltage or
LAOUT terminal voltage, whichever is lower.
COSC H and COSC L voltage is generated by dividing resistance of internal power supply, and the ratio of those voltage
are designed to be hard to fluctuate.
When the input voltage at LAOUT terminal is constant, effect by fluctuation of COSCH and COSCL voltage is large.
However, by setting that voltage input via VTH terminal is generated by dividing resistance of VREF terminal voltage,
application can be made hard to be affected by voltage fluctuation of triangle wave. For an application which requires
strict precision, determine a value with sufficient margin after full consideration of external constant is taken.
Fig.73 DC input PWM operation timing chart
OSC H voltage
OSC L voltage
LAOUT or VTH
VMIN
OUT
A1H
A2H
：
High impedance
②
③
①
Full torque operating area
②
ON-Duty set by VTH terminal
voltage (thermistor voltage)
determines the rotating speed.
③
ON-Duty set by VMIN terminal
determines the rotating speed.
BD6718FV
BD6722FS
BD6709FS
BD6721FS
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相关代理商/技术参数 |
参数描述 |
|---|---|
| BD6721FS | 制造商:ROHM 制造商全称:Rohm 功能描述:Single-Phase Full-Wave Motor Driver for Fan Motor |
| BD6721FS_1 | 制造商:ROHM 制造商全称:Rohm 功能描述:Single-Phase Full-Wave Motor Driver for Fan Motor |
| BD6721FS-E2 | 功能描述:IC MOTOR DRIVER SGL PHASE SSOP16 RoHS:是 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器，驱动器 系列:- 产品变化通告:ATA683(3,4)PLQW Obsolescence 09/Aug/2012 标准包装:1 系列:- 应用:DC 电机控制器，无刷（BLDC），3 相 评估套件:可供 输出数:1 电流 - 输出:100mA 电压 - 负载:5.25 V ~ 20 V 电源电压:5.25 V ~ 20 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-VQFN（7x7） 包装:剪切带 (CT) 其它名称:ATA6833-PLQWCT |
| BD6722FS | 制造商:ROHM 制造商全称:Rohm 功能描述:Single-Phase Full-Wave Motor Driver for Fan Motor |
| BD6722FS_1 | 制造商:ROHM 制造商全称:Rohm 功能描述:Single-Phase Full-Wave Motor Driver for Fan Motor |
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