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參數(shù)資料
| 型號： | L6229DTR |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | DMOS DRIVER FOR THREE-PHASE BRUSHLESS DC MOTOR |
| 中文描述： | DMOS的驅(qū)動三相無刷直流電動機 |
| 文件頁數(shù)： | 11/25頁 |
| 文件大?。?/td> | 582K |
| 代理商： | L6229DTR |
11/25
L6229
Figure 12 shows the magnitude of the Off Time t
OFF
versus C
OFF
and R
OFF
values. It can be approximately
calculated from the equations:
t
RCFALL
= 0.6 · R
OFF
· C
OFF
t
OFF
= t
RCFALL
+ t
DT
= 0.6 · R
OFF
· C
OFF
+ t
DT
where R
OFF
and C
OFF
are the external component values and t
DT
is the internally generated Dead Time with:
20K
≤
R
OFF
≤
100K
0.47nF
≤
C
OFF
≤
100nF
t
DT
= 1μs (typical value)
Therefore:
t
OFF(MIN)
= 6.6μs
t
OFF(MAX)
= 6ms
These values allow a sufficient range of t
OFF
to implement the drive circuit for most motors.
The capacitor value chosen for C
OFF
also affects the Rise Time t
RCRISE
of the voltage at the pin RCOFF. The
Rise Time t
RCRISE
will only be an issue if the capacitor is not completely charged before the next time the
monostable is triggered. Therefore, the On Time t
ON
, which depends by motors and supply parameters, has to
be bigger than t
RCRISE
for allowing a good current regulation by the PWM stage. Furthermore, the On Time t
ON
can not be smaller than the minimum on time t
ON(MIN)
.
t
RCRISE
= 600 · C
OFF
Figure 13 shows the lower limit for the On Time t
ON
for having a good PWM current regulation capacity. It has
to be said that t
ON
is always bigger than t
ON(MIN)
because the device imposes this condition, but it can be smaller
than t
RCRISE
- t
DT
. In this last case the device continues to work but the Off Time t
OFF
is not more constant.
So, small C
OFF
value gives more flexibility for the applications (allows smaller On Time and, therefore, higher
switching frequency), but, the smaller is the value for C
OFF
, the more influential will be the noises on the circuit
performance.
Figure 12. t
OFF
versus C
OFF
and R
OFF
.
t
ON
t
ON
t
ON MIN
t
RCRISE
)
>
2.5
μ
s (typ. value)
=
t
DT
–
>
0.1
1
10
100
1
10
100
1.10
3
1.10
4
Coff [nF]
t
μ
s
R
off
= 100k
R
off
= 47k
R
off
= 20k
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L6229N | DMOS DRIVER FOR THREE-PHASE BRUSHLESS DC MOTOR |
| L6229PD | DMOS DRIVER FOR THREE-PHASE BRUSHLESS DC MOTOR |
| L6229PDTR | DMOS DRIVER FOR THREE-PHASE BRUSHLESS DC MOTOR |
| L6232A | SPINDLE DRIVER |
| L6232B | SPINDLE DRIVER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6229N | 功能描述:馬達/運動/點火控制器和驅(qū)動器 3-Phase DC Motor RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| L6229PD | 功能描述:馬達/運動/點火控制器和驅(qū)動器 DMOS DRIVER RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| L6229PDTR | 功能描述:馬達/運動/點火控制器和驅(qū)動器 3-Phase DC Motor RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| L6229Q | 功能描述:馬達/運動/點火控制器和驅(qū)動器 DMOS Driver for 3-phase DC motor RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| L6229QTR | 功能描述:馬達/運動/點火控制器和驅(qū)動器 DMOS driver 3-phrase DC motor RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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