- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384584 > L6223 (意法半導體) DMOS Programmable High Speed Unipolar Stepper Motor Driver(高速單極步進電機驅(qū)動器) PDF資料下載
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)： | 17/33頁 |
| 文件大?。?/td> | 1078K |
| 代理商： | L6223 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁當前第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁
The behaviour of the oscillator at each phase
change allows the L6223 to drive high speed
unipolarstepper motors.
This is the main functionaldifferencebetween the
L6223 and the L6223 (see fig. 21b).
In the latter, the phase change starts only when
the clock pulse sets the F-F (Fig. 22) that is when
the capacitor voltage reaches the discharge
threshold.
As a result, a variable delay between the leading
edge of the input signal and the beginning of the
current decayto zero can be expected.
Because of that, driving high speedy stepper mo-
tors is produced a noisy beating between chop-
ping frequencyand phasechange rate.
In the L6223 as soon as the phase change is
driven by the inputs, the oscillator voltage Jumps
to its top level, a new discharge period is gener-
ated and the chopping transistor is switched ON
(Q5 in fig. 22). The
advantages are a motor
phase change synchronous to the driving signal
and no beating for whatever rotation speed. By
setting pin 14 at a voltage equal or less than Vrs
= 0.9V, when the IC is normally supplied and the
oscillator is running, the 6 bit shift register is
quickly reset and the power outputs are disabled:
a delay of 700nsecmax mustbe expected.
The use of this behaviour to reset the device at
the turn-on is not allowed; however the reset is
automatically provided by the Logic Supply Volt-
age crossing the threshold of 3.5V (typ.) both at
the turn-ONand at the turn-OFF.
Protection
The protection zeners on the outputs protect the
IC from overvoltage during chopping and phase
change. Actually, at the phase change, the out-
puts rise to a voltage equal to V
O
= 2V
S
+ V
m
,
where V
S
is the power supply and V
m
the product
of the motor resistance Rm with the peak phase
current Ip. Vs is doubled because in the unipolar
motor we have two coupled phases connected in
series(phase A and A, B and B) for each of the
two windings of the motor (MA, MB see Fig. 22).
The leakageinductance,seen from the outputs of
the L6223, can generate an overvoltage higher
than V
O
. To protect the IC, the zeners must be
able to sustain a power of 400W for 1 microsec
and must be able to conduct at a voltage V
z
higher than V
0
= 2V
s(max)
+ V
m
. It’s important that
during the transition, at the max operating ambi-
ent temperature, the zener conduction is guaran-
teed for a voltage lower than 125V (see Absolute
Max Ratings). The ST-BZWO4-85 satisfies this
requirement. The diode connected to the com-
mon protectsthis input from the undergoundsdue
to the leakage inductances and/or the imbalanc-
ing betweenthe phase currents.
Figure21a:
Relationshipbetweencapacitordischarge
oftheoscillator, windowandsensingvoltage
Figure21b:
Oscillator behaviourof the L6223 and
of theL6223 (simplified waveforms).
L6223
17/33
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 |
發(fā)布緊急采購，3分鐘左右您將得到回復。