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TB6568KQ,8

P1-P3P4-P6P7-P9P10-P12P13-P15
TB6568KQ
2017-04-14
7
3. Overvoltage Shutdown Circuit (VSD)
The TB6568KQ incorporates an overvoltage shutdown circuit. When the power supply voltage exceeds 53 V
(typ.), all the output transistors are turned off (Hi-Z).
The VSD circuit has a hysteresis of 3 V (typ.); thus the TB6568KQ resumes the normal operation at 50 V
(typ.).
Note: The VSD circuit is activated if the absolute maximum voltage rating is violated. Note that the circuit is
provided as an auxiliary only and does not necessarily provide the IC with a perfect protection from any
kind of damages.
53 V (typ.
)
VM
voltage
VSD internal signal
H
L
50 V (typ.
)
VSD operation
VSD
operation
OUT1, OUT2
H
L
Normal operation OFF (Hi-Z) Normal operation
TB6568KQ
2017-04-14
8
4. Thermal Shutdown Circuit (TSD)
The TB6568KQ incorporates a thermal shutdown circuit. If the junction temperature (T
j
) exceeds 170°C
(typ.), all the output transistors are turned off (Hi-Z).
The shutdown is released and the TB6568KQ resumes the normal operation when both the IN1 pin and IN2
pin are driven Low.
TSD = 170°C (typ.)
Note: The TSD circuit is activated when the junction temperature (T
j
) violates the rating temperature of 150°C.
Note that the circuit is provided as an auxiliary only and does not necessarily provide the IC with a perfect
protection from any kind of damages.
17
0°C (typ.)
Chip temperature:
Junction temperature
(T
j
)
TSD
internal signal
H
L
TSD operation
TSD
operation
IN1, IN2
H
L
OUT1, OUT2
H
L
More than 1 µs (typ.)
Normal operation
OFF (Hi-Z)
Normal operation
TB6568KQ
2017-04-14
9
5. Overcurrent Shutdown Circuits (ISD)
The TB6568KQ incorporates overcurrent shutdown (ISD) circuits monitoring the current that flows through
each of all the four output power transistors.
The threshold current ranges from 3 A to 6 A. If any of the ISDs detects an overcurrent for more than 5.1 µs
(typ.), which is the predefined detection time, all the output transistors are turned off and enter High
impedance state.
The shutdown is released and the TB6568KQ resumes the normal operation when both the IN1 pin and IN2
pin are driven Low.
Note: The ISD is activated if the absolute maximum current rating is violated. Note that the circuit is provided as
an auxiliary only and does not necessarily provide the IC with a perfect protection from damages due to
overcurrent caused by power fault, ground fault, load-short and the like.
ISD internal signal
H
L
IN1, IN2
H
L
OUT1, OUT2
ISD operation
Threshold
0
5.1 µs
(typ.)
Output current
More than 1 µs (typ.)
Normal operation
OFF (Hi-Z)
Normal operation
P1-P3P4-P6P7-P9P10-P12P13-P15

TB6568KQ,8

Mfr. #:
Buy TB6568KQ,8
Manufacturer:
Toshiba
Description:
Motor / Motion / Ignition Controllers & Drivers Brush Motor Driver IC
Lifecycle:
New from this manufacturer.
Delivery:
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