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參數(shù)資料
| 型號： | L6223 |
| 廠商： | 意法半導體 |
| 英文描述： | DMOS Programmable High Speed Unipolar Stepper Motor Driver(高速單極步進電機驅(qū)動器) |
| 中文描述： | DMOS的可編程高速單極性步進電機驅(qū)動器（高速單極步進電機驅(qū)動器） |
| 文件頁數(shù)： | 18/33頁 |
| 文件大小： | 1078K |
| 代理商： | L6223 |
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Use of the ProgrammingMode
A typical application of the L6223 requires driving
the motoraccording to Fig.23a and Fig. 23b.
Starting from t
0
= t
5
and continuinguntil t
1
themo-
tor is kept in stand-by;at time t
1
beginsan accel-
eration period that is completed at time t
3
. The
motor then is driven at a contant speed until t
4
,
when the speed is decelerated and is stopped at
t
5
= t
0
for a new standbyperiod.
During these events the L6223 can be pro-
grammed several times for different working
modes. The most important parameter is the cur-
rent through the windings of the stepper: at the
time t
0
; t
1
; t
2
; t
3
and t
4
the current can be modi-
fied, for example, as it is shown in Fig. 23b. This
behaviour allows the best motion control and, at
the same time, optimizes efficency of the power
output block of the I. C.
But this is not the best in terms of performances
by programming:in fact, betweent
1
and t
5
thede-
vice can be programmed to work in Closed Loop
and to chop at half of the RC oscillator frequency
during the time t
3
to t
4
. In the stand-by condition
the I. C. can be programmed to work in Open
Loop mode where the current can be fixed by the
reduction of the minimum T
ON
time (75% or 50%)
defined by the dischargetime of the RC oscillator.
Of course in this way the current can be modified
by Supply Voltage changes; the same is not pos-
sible in Closed Loop operation where the device,
in order to keep the windings current constant,
modifies the T
ON
time: wide at low V
S
and narrow
at high V
S
. Thisis the reasonwhy when the motor
is driven at a constant speed (t
3
to t
4
) with small
current and high Supply Voltage, it could become
necessary to program the lower chopping fre-
Figure23: a,b)
Speed profileand motorcurrent
controlchange for the best efficencyof the I.C.
c,d)
Currentcontrol change by using DA/CLEV
input only, duringthe stand-byperiod.
a
b
c
d
quency to allow a suitable T
ON
width otherwise
the current of the windings would go out of con-
trol.
The motion profile, shown in Fig. 23a can be ob-
tained when preferred, with only two program
changes actuated while the motor is in stand-by.
The current becomes as shown in Fig. 23c. The
device can be programmed at t
0
= t
5
for I
motor
=
55% (stand-by) and at t
1
for I
motor
= 70%: for both
the actuations,the DA/CLEV is kept high to allow
the program change, while, by keeping it to zero
during t
1
- t
3
and t
4
- t
5
, the current is automat-
ically select as 100% (Fig. 23d). During t
3
- t
4
the
current is reduced according to the percentage
programmedat the time t
1
.
Power dissipation
(Simplified method of calcula-
tion).
Here below the Full Step OperatingMode is con-
sidered; in addition, the following working condi-
tions have been taken up:
1) Constant speed rotation of the driven unipolar
stepperMotor.
Figure22:
Pover output configuration.
L6223
18/33
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L6226 | DMOS DUAL FULL BRIDGE DRIVER |
| L6226D | DMOS DUAL FULL BRIDGE DRIVER |
| L6226N | DMOS DUAL FULL BRIDGE DRIVER |
| L6226PD | DMOS DUAL FULL BRIDGE DRIVER |
| L6228 | DMOS DRIVER FOR BIPOLAR STEPPER MOTOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6223A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| L6225 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:DMOS DUAL FULL BRIDGE DRIVER |
| L6225_03 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:DMOS DUAL FULL BRIDGE DRIVER |
| L6225D | 功能描述:馬達/運動/點火控制器和驅(qū)動器 Dual Full Bridge 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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| L6225DTR | 功能描述:馬達/運動/點火控制器和驅(qū)動器 Dual Full Bridge 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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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