tb6568kq TOSHIBA Semiconductor CORPORATION, tb6568kq Datasheet - Page 6

• Manufacturer Part Number: tb6568kq
• Description: Full-bridge Dc Motor Driver Ic
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Functional Description
purposes.
The equivalent circuit diagrams may be simplified or some parts of them may be omitted for explanatory
Timing charts may be simplified for explanatory purposes.
1. I/O Function Table
2. Undervoltage Lockout Circuit (UVLO)
The TB6568KQ incorporates an undervoltage lockout circuit. If the power supply voltage drops under 8 V
(typ.), all the output transistors are turned off (Hi-Z).
The UVLO circuit has a hysteresis of 0.7 V (typ.); thus the TB6568KQ recovers at 8.7 V (typ.).
UVLO operation
IN1
H
H
L
L
UVLO internal signal
Input
OUT1, OUT2
VM voltage
IN2
H
H
L
L
8.7 V (typ.)
8.0 V (typ.)
H
L
H
L
OUT1
H
L
L
OFF (Hi-Z)
Normal operation
6
OUT2
H
L
L
Output
Short Brake
CW/CCW
CCW/CW
Stop
(caused by a release of TSD/ISD)
UVLO operation
OFF (Hi-Z)
Mode
Normal operation
TB6568KQ
2009-08-11