- 您现在的位置：买卖IC网 > PDF目录43899 > L6223 (STMICROELECTRONICS) STEPPER MOTOR CONTROLLER, 6 A, PDIP20 PDF资料下载
参数资料
| 型号： | L6223 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 运动控制电子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 6 A, PDIP20 |
| 封装： | POWER, DIP-20 |
| 文件页数： | 9/33页 |
| 文件大小： | 3431K |
| 代理商： | L6223 |
第1页第2页第3页第4页第5页第6页第7页第8页当前第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页
The behaviour of the oscillator at each phase
change allows the L6223 to drive high speed
unipolar stepper motors.
This is the main functional difference between 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 decay to zero can be expected.
Because of that, driving high speedy stepper mo-
tors is produced a noisy beating between chop-
ping frequency and phase change 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 700nsec max must be 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-ON and 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 VO = 2VS + Vm,
where VS is the power supply and Vm 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 leakage inductance, seen from the outputs of
the L6223, can generate an overvoltage higher
than VO. 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 Vz
higher than V0 = 2Vs(max) + Vm. 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 protects this input from the undergounds due
to the leakage inductances and/or the imbalanc-
ing between the phase currents.
Figure 21a: Relationship between capacitor discharge
of the oscillator, window and sensing voltage
Figure 21b: Oscillator behaviour of the L6223 and
of the L6223 (simplified waveforms).
L6223
17/33
相关PDF资料 |
PDF描述 |
|---|---|
| L6225PDTR | BRUSHLESS DC MOTOR CONTROLLER, 2.8 A, PDSO20 |
| L6225PD | BRUSHLESS DC MOTOR CONTROLLER, 2.8 A, PDSO20 |
| L6225D | BRUSHLESS DC MOTOR CONTROLLER, 2.8 A, PDSO20 |
| L6226DTR | BRUSHLESS DC MOTOR CONTROLLER, 2.8 A, PDSO24 |
| L6226D | BRUSHLESS DC MOTOR CONTROLLER, 2.8 A, PDSO24 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| L6223A | 制造商:未知厂家 制造商全称:未知厂家 功能描述: |
| L6225 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:DMOS DUAL FULL BRIDGE DRIVER |
| L6225_03 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:DMOS DUAL FULL BRIDGE DRIVER |
| L6225D | 功能描述:马达/运动/点火控制器和驱动器 Dual Full Bridge RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| L6225DTR | 功能描述:马达/运动/点火控制器和驱动器 Dual Full Bridge RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
发布紧急采购，3分钟左右您将得到回复。