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參數(shù)資料
| 型號： | L6223 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 運動控制電子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 6 A, PDIP20 |
| 封裝： | POWER, DIP-20 |
| 文件頁數(shù)： | 10/33頁 |
| 文件大?。?/td> | 3431K |
| 代理商： | L6223 |
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Use of the Programming Mode
A typical application of the L6223 requires driving
the motor according to Fig. 23a and Fig. 23b.
Starting from t0 = t5 and continuing until t1 the mo-
tor is kept in stand-by; at time t1 begins an accel-
eration period that is completed at time t3. The
motor then is driven at a contant speed until t4,
when the speed is decelerated and is stopped at
t5 = t0 for a new standby period.
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 t0; t1; t2; t3 and t4 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, between t1 and t5 the de-
vice can be programmed to work in Closed Loop
and to chop at half of the RC oscillator frequency
during the time t3 to t4. 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 TON time (75% or 50%)
defined by the discharge time 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 TON time: wide at low VS and narrow
at high VS. This is the reason why when the motor
is driven at a constant speed (t3 to t4) with small
current and high Supply Voltage, it could become
necessary to program the lower chopping fre-
Figure 23: a,b) Speed profile and motor current
control change for the best efficency of the I.C.
c,d) Current control change by using DA/CLEV
input only, during the stand-by period.
a
b
c
d
quency to allow a suitable TON 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 t0 = t5 for Imotor =
55% (stand-by) and at t1 for Imotor = 70%: for both
the actuations, the DA/CLEV is kept high to allow
the program change, while, by keeping it to zero
during t1 - t3 and t4 - t5, the current is automat-
ically select as 100% (Fig. 23d). During t3 - t4 the
current is reduced according to the percentage
programmed at the time t1.
Power dissipation (Simplified method of calcula-
tion).
Here below the Full Step Operating Mode is con-
sidered; in addition, the following working condi-
tions have been taken up:
1) Constant speed rotation of the driven unipolar
stepper Motor.
Figure 22: Pover output configuration.
L6223
18/33
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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(fēng)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(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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