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TB6560HQ Datasheet(PDF) 15 Page - Toshiba Semiconductor

Part No. TB6560HQ
Description  PWM Chopper-Type bipolar Stepping Motor Driver IC
Download  31 Pages
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Manufacturer  TOSHIBA [Toshiba Semiconductor]
Direct Link  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TB6560HQ Datasheet(HTML) 15 Page - Toshiba Semiconductor

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TB6560HQ/FG
2006-05-31
15
2.
Current Control Modes (Decay Mode effect)
• Direction in which current value increases (sine wave)
• Direction in which sine wave decreases
(when a high decay ratio (MDT%) is used in Mixed Decay mode)
• Direction in which sine wave decreases
(when a low decay ratio (MDT%) is used in Mixed Decay mode)
During Mixed Decay mode and Fast Decay mode, if the setting current value < output current at RNF:
current monitoring point, the Charge mode at the next chopping cycle will disappear and the pattern will
change to Slow  Fast Mode (Slow
→ Fast occurs at MDT). (In reality, a charge is applied momentarily to
confirm the current.)
Note: These figures are intended for illustrative purposes only. If designed more realistically, they would show
transient response curves.
Slow
Slow
Slow
Slow
Fast
Fast
Charge
Charge
Fast
Charge
Fast
Charge
Setting
Current
Value
Setting
Current
Value
Slow
Slow
Fast
Charge
Fast
Charge
Slow
Fast
Slow
Fast
Charge
Since the current’s rate of decay is fast, its compliance
with the setting current value is also fast.
Setting
Current
Value
Setting
Current
Value
Slow
Fast
Charge
Slow
Fast
Charge
Fast
Slow
Fast
Slow
Since the current’s rate of decay is slow, its
compliance with the setting current value takes a
long time (or may not follow at all).
Setting
Current
Value
Setting
Current
Value


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