TLE7189QK_09 Datasheet, PDF (18/29 Pages) Infineon Technologies AG – PRO-SILTM 3-Phase Bridge Driver IC

TLE7189QK
Under voltage shut down will not occur when V_S > 6V, Q_G < 250nC, f_PWM < 25kHz, and the charge pump capacitors
Cxx = 4.7 µF.
5.2.4 Over Voltage Shut Down
The TLE7189QK has an integrated over voltage shut down to avoid destruction of the IC at high supply
voltages.The voltage is measured at the Vs and the VDH pin. When one of them or all of them exceed the over
voltage shut down level for more than the specified filter time then the external MOSFETs are switched off. In
addition, over voltage will shut down the charge pumps and will discharge the charge pump capacitors. This results
in an under voltage condition which will be indicated on the ERRx pins. During over voltage shut down the external
MOSFETs and the charge pumps remain off until a reset is performed.
5.2.5 Over Temperature Warning
If the junction temperature is exceeding typ. 155°C an error signal is given as warning. The driver IC will continue
to operate in order not to disturb the application.
The warning is removed automatically when the junction temperature is cooling down.
It is in the responsibility of the user to protect the device against over temperature destruction.
5.2.6 VCC Check
To assure a high level of system safety, the TLE7189QK provides an VCC check.
The 5.0V system supply connected to the VS_OA pin is checked by an internally monitoring for over- and under
voltage. An internal filter time is integrated to avoid faulty triggering.
The VCC check is active when the signal on the ENA pin is high and inactive when ENA signal is low (=driver IC
disabled).
In case of under- or over voltage at VS_OA, the VCC check will disable the driver IC and is latched. To restart the
output stages, a reset has to be performed with the ENA pin.
The VCT pin decides about the over voltage and under voltage detection level.
5.2.7 ERR Pins
The TLE7189QK has two status pins to provide diagnostic feedback to the µC. The outputs of these pins are 5V
push pull stages, they are either High or Low.
Table 2 Overview of error conditions
INH
High
High
High
High
High
Low
ENA
High
High
High
High
Low
X
ERR1
Low
Low
High
High
High
Low
ERR2
Low
High
Low
High
High
Low
Driver conditions
Under voltage or VCC check error
Over temperature or over voltage
Short circuit detection
No errors observed
No errors will be reported (except OT warning & undervoltage shutdown)
ERR output tristate - low secured by pull down
Table 3 Behavior at different error conditions
Error condition
Short circuit detection
Under voltage
Over voltage
restart behavior
Shuts down...
Latch, reset must be performed at ENA pin All external Power -MOSFETs
Auto restart
All external Power -MOSFETs
Latch, reset must be performed at ENA pin All external Power -MOSFETs
Data Sheet
18
Rev. 2.0, 2009-07-10