參數(shù)資料
型號(hào)： BD6718FV-E2
元件分類： 運(yùn)動(dòng)控制電子
英文描述： BRUSHLESS DC MOTOR CONTROLLER, 0.02 A, PDSO20
封裝： ROHS COMPLIANT, SSOP-20
文件頁(yè)數(shù)： 24/34頁(yè)
文件大?。?/td> 1916K
代理商： BD6718FV-E2
30/40
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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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
BD6721FS 制造商:ROHM 制造商全稱:Rohm 功能描述:Single-Phase Full-Wave Motor Driver for Fan Motor
BD6721FS_1 制造商:ROHM 制造商全稱: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 類別:集成電路 (IC) >> PMIC - 電機(jī)和風(fēng)扇控制器，驅(qū)動(dòng)器 系列:- 產(chǎn)品變化通告:ATA683(3,4)PLQW Obsolescence 09/Aug/2012 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:DC 電機(jī)控制器，無(wú)刷（BLDC），3 相 評(píng)估套件:可供 輸出數(shù):1 電流 - 輸出:100mA 電壓 - 負(fù)載:5.25 V ~ 20 V 電源電壓:5.25 V ~ 20 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-VQFN（7x7） 包裝:剪切帶 (CT) 其它名稱:ATA6833-PLQWCT
BD6722FS 制造商:ROHM 制造商全稱:Rohm 功能描述:Single-Phase Full-Wave Motor Driver for Fan Motor
BD6722FS_1 制造商:ROHM 制造商全稱:Rohm 功能描述:Single-Phase Full-Wave Motor Driver for Fan Motor
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