參數(shù)資料
型號(hào): L6228D
廠商: STMICROELECTRONICS
元件分類: 運(yùn)動(dòng)控制電子
英文描述: STEPPER MOTOR CONTROLLER, 2.8 A, PDSO24
封裝: SO-24
文件頁數(shù): 5/26頁
文件大?。?/td> 451K
代理商: L6228D
13/26
L6228
tRCRISE = 600 COFF
Figure 13 shows the lower limit for the on time tON for having a good PWM current regulation capacity. It has to
be said that tON is always bigger than tON(MIN) because the device imposes this condition, but it can be smaller
than tRCRISE - tDT. In this last case the device continues to work but the off time tOFF is not more constant.
So, small COFF value gives more flexibility for the applications (allows smaller on time and, therefore, higher
switching frequency), but, the smaller is the value for COFF, the more influential will be the noises on the circuit
performance.
Figure 12. tOFF versus COFF and ROFF
Figure 13. Area where tON can vary maintaining the PWM regulation.
t
ON
t
ON MIN
()
>2.5
s (typ. value)
=
t
ON
t
RCRISE
t
DT
>
0.1
1
10
100
1
10
100
1 .10
3
1 .10
4
Coff [nF]
to
ff
[
s]
Roff = 100k
Roff = 47k
Roff = 20k
0.1
1
10
100
1
10
100
Coff [nF]
to
n(
m
in
)[us
]
2.5
s (typ. value)
相關(guān)PDF資料
PDF描述
L6228N STEPPER MOTOR CONTROLLER, 2.8 A, PDIP24
L6229QTR BRUSHLESS DC MOTOR CONTROLLER, 2.8 A, QCC32
L6229Q BRUSHLESS DC MOTOR CONTROLLER, 2.8 A, QCC32
L6230PDTR BRUSHLESS DC MOTOR CONTROLLER, 2.8 A, PDSO36
L6230PD BRUSHLESS DC MOTOR CONTROLLER, 2.8 A, PDSO36
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