参数资料
型号: LB11947
元件分类: 运动控制电子
英文描述: BRUSH DC MOTOR CONTROLLER, 1.75 A, PDIP28
封装: 0.500 INCH, DIP-28
文件页数: 14/14页
文件大小: 154K
代理商: LB11947
LB11947
No.7318-9/14
Motor driver, logic input truth table
ST
PWM
MD
MDINT
PH
OUT
OUT-
Operation mode
L
*
OFF
Standby mode (circuit OFF)
H
*
H
L
SLOW (short brake) at power ON, forward rotation, and at the current limit
H
*
L
H
L
FAST (all OFF) at power ON, forward rotation, and at current limit
H
*
H
L
H
SLOW (short brake) at power ON, reverse rotation, and at current limit
H
*
L
H
FAST (all OFF) at power ON, reverse rotation, and at current limit
H
L
H
*
L
Current decay at SLOW (short brake)
H
L
*
OFF
Current decay at FAST (all OFF)
(*) Don’t care.
Motor driver, output stage transistor operation mode
The figure above shows the current direction at PH = “H.”
Note that the upper diode is incorporated and the lower diode is an external Schottky diode.
Motor driver, output stage transistor operation function
Mode
U1
U2
L1
L2
CHARGE (PH = “H”)
ON
OFF
ON
CHARGE (PH = “L”)
OFF
ON
OFF
FAST
OFF
SLOW
OFF
ON
Charge
Fast
Slow
RS
VM
U1
L1
L2
U2
ON
OFF
RS
VM
U1
L1
L2
U2
OFF
RS
VM
U1
L1
L2
U2
OFF
ON
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