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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： | 24/34页 |
| 文件大小： | 1916K |
| 代理商： | BD6718FV-E2 |
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8) Soft start＜BD6722FS＞
The soft start section is set at the rotation start or the LOCK protection release, etc.
The soft start time is decided by the constant circuit connected with VMIN terminal.
And VMIN terminal is used as the lowest rotational speed setting. Set VMIN to 1.75V or more (lowest rotational speed
DUTY≦50%).
a) Soft start time of VTH setting DUTY≧50%
It gradually rises to the DUTY set with VTH after it starts.
Fig.94 shows the soft start operation at VTH setting DUTY=70% and VMIN setting DUTY=20%.
b). Soft start time of VTH setting DUTY≦50%
DUTY rises gradually, and rises to Duty=50% temporarily after it starts. The purpose of this is to secure the start torque
when DUTY set with VTH and VMIN is too low.
It gradually descends to the DUTY set with VTH and VMIN after it rotates by DUTY=50% for a fixed time.
Fig.95 shows the soft start operation at VTH setting DUTY=10% and VMIN setting DUTY=20%.
Because the lock protection function is turned off while soft start, soft start time can be set longer than the lock
detection time. The soft start function can be turned off by not connecting the capacitor to VMIN terminal.
O
u
tp
ut
C
ur
rent
TIME
WITHOUT SOFT START
SOFT START
Out
put
D
ut
y(%)
TIME
VTH=70%
VMIN=20%
50%
Out
put
D
ut
y(%)
TIME
VTH=10%
VMIN=20%
50%
VREF
－
+
R1
R2
Fig.92 Output current characteristic by soft start
Fig.93Soft start setting circuit
Fig.94 Soft start time chart of DUTY≧50%
Fig.95 Soft start time chart of DUTY≦50%
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相关代理商/技术参数 |
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| 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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