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参数资料
| 型号： | LV8731V |
| 厂商： | SANYO SEMICONDUCTOR CO LTD |
| 元件分类： | 运动控制电子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 2.5 A, PDSO44 |
| 封装： | 0.275 INCH, SSOP-44 |
| 文件页数： | 9/26页 |
| 文件大小： | 323K |
| 代理商： | LV8731V |
LV8731V
(12) Current control operation specification
(Sine wave increasing direction)
No.A1482-17/26
(Sine wave decreasing direction)
FAST
SLOW
CHARGE
FAST
SLOW
CHARGE
Current mode
fchop
Coil current
STEP
Set current
Forced CHARGE
section
Forced CHARGE
section
FAST
SLOW
FAST
SLOW
CHARGE
Current mode
fchop
Coil current
STEP
Set current
Forced CHARGE
section
CHARGE
In each current mode, the operation sequence is as described below :
At rise of chopping frequency, the CHARGE mode begins. (In the time defined as the “blanking time,” the CHARGE
mode is forced regardless of the magnitude of the coil current (ICOIL) and set current (IREF).)
The coil current (ICOIL) and set current (IREF) are compared in this blanking time.
When (ICOIL < IREF) state exists ;
The CHARGE mode up to ICOIL
≥ IREF, then followed by changeover to the SLOW DECAY mode, and
finally by the FAST DECAY mode for approximately 1
μs.
When (ICOIL < IREF) state does not exist ;
The FAST DECAY mode begins. The coil current is attenuated in the FAST DECAY mode till one cycle of
chopping is over.
Above operations are repeated. Normally, the SLOW (+FAST) DECAY mode continues in the sine wave increasing
direction, then entering the FAST DECAY mode till the current is attenuated to the set level and followed by the SLOW
DECAY mode.
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