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首页东芝TB6600HG:新型微步进电机驱动器解析
东芝TB6600HG:新型微步进电机驱动器解析
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更新于2024-07-25
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东芝TB6600HG是一款专为高性能、低振动控制设计的步进电机驱动器集成电路(IC)。这款新型产品属于东芝THB6064AH系列,采用了先进的PWM chopping技术,旨在为2相双极型步进电机提供高效、平稳的驱动。TB6600步进电机驱动器以其单芯片设计为特点,利用高耐压的BiCD工艺,具有出色的电流效率,其典型情况下上/下两个功率管的导通电阻(Ron)仅为0.4欧姆。 TB6600驱动器支持多种驱动模式,包括正向和反向旋转,可以实现1/2、1/8、1/10、1/16、1/20、1/32、1/40和1/64等不同细分步进,为用户提供了丰富的选择性。此外,它具有高输出电压耐受,最大输出电压VDSS高达50伏特,并能在峰值时提供4.5安培的强大电流,满足了高负载应用的需求。 封装形式为HZIP25-P-1.27,这使得该驱动器紧凑且易于集成。还配备了监控输出状态的DOWN/ALERT引脚,以便用户实时了解电机的工作情况。为了保证设备的稳定性和安全性,驱动器内置了热关断(TSD)电路和过电流检测(ISD)功能,可以在温度过高或电流超过安全范围时自动保护电机。 在操作时,必须注意,由于TB6600HG对静电放电非常敏感,处理这些IC时应确保工作环境有良好的防静电措施,并保持适宜的环境温度,以防止对器件造成潜在损害。东芝TB6600HG是一款性能强大、可靠性高的步进电机驱动解决方案,适用于需要精确控制和高效率应用的场合。
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HHBY THB6064AH
Current Waveforms and Mixed Decay Mode Settings
The current decay rate of the Decay mode operation can be determined by the DCY1 and DCY2 inputs for
constant-current control.
The “NF” refers to the point at which the output current reaches its predefined current level.
The smaller the MDT value, the smaller the current ripple amplitude. However, the current decay rate decreases.
NF
OSC Pin
Internal
Waveform
f
chop
NF
NF
NF
MDT
MDT
MDT
MDT
Predefined Current Level
Predefined Current Level
Predefined Current Level
Charge mode NF: Predefined current level Slow mode Mixed
decay timing Fast mode Current monitoring (When
predefined current level Output current) Charge mode
Charge mode NF: Predefined current level Slow mode Mixed
decay timing Fast mode Current monitoring (When
predefined current level Output current) Charge mode
Charge mode NF: Predefined current level Slow mode Mixed
decay timing Fast mode Current monitoring (When
predefined current level Output current) Charge mode
Charge mode NF: Predefined current level Slow mode Mixed
decay timing Fast mode Current monitoring (When
predefined current level Output current) Charge mode
Predefined Current Level
20%
fast
Deca
y
Mode
40%
fast
Deca
y
Mode
60%
fast
Deca
y
Mode
80%
fast
Deca
y
Mode
2011-05-11
8
HHBY THB6064AH
Current Control Modes (Effects of Decay Modes)
Increasing the current (sine wave)
Predefined
Curre
nt Level
Charge
Charge
Fast
Fast
Slow
Slow
Slow Slow
FastCharge
Fast Charge
Predefined
Current Level
Decreasing the current with a high decay rate (The current decay rate in Mixed Decay mode is the ratio
between the time in Fast-Decay mode (discharge time after MDT) and the remainder of the period.)
Predefined
Curre
nt Level
Predefined
Current Level
decreased to the
predefined value in a short time.
Since the current decays quickly, it can be
Slow
Fas
t
Slow
Fast
Charge
Charge
Fas
t
Charge
Fast
SlowSlow
Decreasing the current with a low decay rate (The current decay rate in Mixed Decay mode is the ratio between
the time in Fast-Decay mode (discharge time after MDT) and the remainder of the period.)
Slow
Fast
Charge
Slow
Fast
Charge
Fast
Slow
Fast
Slow
Since the current decays slowly, decreasing the current
to the predefined value takes a long time (or the current
cannot be properly decreased to the predefined value).
Predefined
Current Level
Predefined
Current Level
Durin
g Mixed Decay and Fast Decay modes, if the predefined current level is less than the output current at the
RNF (current monitoring point), the Charge mode in the next chopping cycle will disappear (though the current
control mode is briefly switched to Charge mode in actual operations for current sensing) and the current is
controlled in Slow and Fast Decay modes (mode switching from Slow Decay mode to Fast Decay mode at the
MDT point).
Note: The above figures are rough illustration of the output current. In actual current waveforms, transient response
curves can be observed.
2011-05-11
9
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