Data Sheet

17

Rev. 1.1, 2016-01-28

TLE7183QU

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.

If the charge pump buffer voltage recovers, the status of the output stages will match the input patterns again. This

allows an operation of the motor in case of undervoltage shut down without a reset by the µC.

CPx, CBx = 4.7 µF.

5.2.5

Overvoltage Shutdown

The TLE7183QU has an integrated overvoltage shut down to avoid destruction of the IC at high supply voltages.

The voltages at the pins Vs and VDH are monitored. The external MOSFETs will be switched off if one or both of

them exceed the overvoltage shut down level for more than the specified filter time. In addition, the overvoltage

condition will lead to a shut down of the charge pumps and a discharge of the charge pump capacitors. This results

in an undervoltage condition which will be indicated at 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 overtemperature warning is reported at the ERRx pins.

However the driver IC will continue to operate in order not to disturb the application.

This warning is self-clearing and will be cleared if the junction temperature cools down again. It is up to the user

to protect the device from overtemperature destruction.

5.2.7

ERRx pins

The TLE7183QU has two status pins to provide diagnostic feedback to a µC. The outputs of these pins are 5V

push pull stages which are either high or low. Table 2 contains an overview. Some errors require a full reset of the

driver using one of the ENAx pins to return to normal operation. Please see Table 3 for details.

If multiple errors occur at the same time, only the one with the highest priority listed in Table 4 is reported. If the

device is disabled using one of the ENAx pins, only the errors Undervoltage and Overtemperature Warning are

reported. Other errors are not reported.

Table 2

Overview of Error Conditions

Table 3

Behavior at different Error Conditions

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

behavior allows to distinguish between the different combined error types reported at the ERRx pins.

ERR1

ERR2

Driver conditions

Low

Low

no errors

High

Low

Overtemperature Warning or Overvoltage Shut Down

High

High

Undervoltage Shut Down

Low

High

Short Circuit Detection or Overcurrent Warning

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 Shut Down Auto restart

All external Power -MOSFETs

Overvoltage Shut Down

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

Overtemperature Warning Self clearing

Nothing