Data Sheet TLE6282G

8

Rev 2.2 2006-03-07

Remarks:

Default status of input pins:

To assure a defined status of all input pins in case of disconnection, these pins are internally

secured by pull up / pull down current sources with approx. 20µA.

The following table shows the default status of each input pin.

Input pin

Default status

ILx (active high)

Low

IHx (active low)

High

DT/DIS (active high)

High

Definition:

In this datasheet a duty cycle of 98% means that the GLx pin is 2% of the PWM period in

high condition.

Functional description

Description of Dead Time Pin / Disable Pin / Reset

In the range between 1.5 and 3.5 V the dead time is varied from 100ns to 3.1µs typ. In the

range below 1.0V the dead time is disabled / shoot through is allowed. Both external Mosfets

of the same half bridge can be switched on simultaneously. This function allows the use of a

half bridge for valves and injectors. In the range above 4.0V the device is disabled.

If DIS is pulled up to 5V for 3.1 to 3.4µs only the ERR register is cleared (reset), no output

stage is shut down. A shut down of all external Mosfets occurs if DIS is pulled up for longer

than 7µs.

Condition of DT/DIS pin

Function

0 - 1V

Disable of dead time; Shoot through is allowed

1.5 - 3.5V

Adjust dead time between 100ns and 3.1µs typ.

a) Reset of diagnosis register if DT/DIS voltage is higher than

4V for a time between 3.1µs and 3.4µs

> 4V

b) Shut down of output stages if DT/DIS voltage is higher

than 4V for a time above 7µs (Active pull down of gate volt-

age)

Description of Diagnosis

The ERR pin is an open collector output and has to be pulled up with external pull up resis-

tors to 5V. In normal conditions the ERR signal is high. In case of shutdown of any output

stage the ERR is pulled down. This shut down can be caused by undervoltage or short cir-

cuit.

Recommended Start-up procedure

The following procedure is recommended whenever the Driver IC is powered up:

• Disable the Driver IC via DT/DIS pin

• After the supply voltage has ramped up, wait for several ms to pre-charge the boot-