tb6560hq TOSHIBA Semiconductor CORPORATION, tb6560hq Datasheet - Page 15

• Manufacturer Part Number: tb6560hq
• Description: Pwm Chopper-type Bipolar Stepping Motor Driver Ic
• Manufacturer: TOSHIBA Semiconductor CORPORATION

2. Current Control Modes (Decay Mode effect)
Note: These figures are intended for illustrative purposes only. If designed more realistically, they would show
Setting
Current
Value
Setting
Current
Value
Setting
Current
Value
current monitoring point, the Charge mode at the next chopping cycle will disappear and the pattern will
change to Slow c Fast Mode (Slow
confirm the current.)
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)
transient response curves.
During Mixed Decay mode and Fast Decay mode, if the setting current value < output current at RNF:
Charge
Charge
Charge
Slow
Slow
Slow
Fast
Fast
Fast
Charge
Charge
Charge
Fast occurs at MDT). (In reality, a charge is applied momentarily to
Slow
Slow
Slow
Setting
Current
Value
Setting
Current
Value
Current
Setting
Value
Fast
15
Fast
Fast
Since the current’s rate of decay is fast, its compliance
with the setting current value is also fast.
Charge
Slow
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).
Slow
Fast
Fast
Fast
Charge
Charge
Slow
TB6560HQ/FG
Slow
Fast
2006-05-31
Slow
Fast
Fast