Data Sheet

17

2.2, 2016-01-27

TLE7183F

5.2.4

Undervoltage Shut Down

The TLE7183F has an integrated undervoltage shut down, to assure that the behavior of the device is predictable

in all supply voltage ranges.

If the voltage of a charge pump buffer capacitors CBx reaches the undervoltage shut down level for a minimum

specified filter time, the gate-source voltage of all external MOSFETs will be actively pulled to low. In this situation

the short circuit detection of this output stage is deactivated to avoid a latching shut down of the driver.

As soon as the charge pump buffer voltage recovers, the output stage condition will be aligned to the input patterns

automatically. This allows to continue operation of the motor in case of undervoltage shut down without a reset by

the µC.

capacitors Cxx = 4.7 µF.

5.2.5

Overvoltage Shut Down

The TLE7183F has an integrated overvoltage shut down to avoid destruction of the IC at high supply voltages.

The voltage is observed at the Vs and the VDH pin. When one of them or all of them exceed the overvoltage shut

down level for more than the specified filter time then the external MOSFETs are switched off. In addition,

overvoltage will shut down the charge pumps and will discharge the charge pump capacitors. This results in an

undervoltage condition which will be indicated on the ERRx pins. During overvoltage shut down the external

MOSFETs and the charge pumps remain off until a reset is performed.

5.2.6

Overtemperature Warning

If the junction temperature is exceeding typ. 170°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 overtemperature destruction.

5.2.7

ERR Pins

The TLE7183F 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 3

Overview of error conditions

Table 4

Behaviour at different error conditions

Note: All errors do NOT lead to sleep mode. Sleep mode is only initiated with the INH pin. The latch and restart

behaviour allows to distinguish between the different error types combined at the ERR signals.

ERR1

ERR2

Driver conditions

Low

Low

no errors

High

Low

Overtemperature or overvoltage

High

High

Undervoltage

Low

High

Short circuit detection or overcurrent

Error condition

restart behavior

Shuts down...

Short circuit detection

Latch, reset must be performed at ENAx pin All external Power -MOSFETs

Overcurrent warning

Self clearing

Nothing

Undervoltage

Auto restart

All external Power -MOSFETs

Overvoltage

Latch, reset must be performed at ENAx pin All external Power -MOSFETs

Overtemperature warning Self clearing

Nothing