TLE7184F

MOSFET Driver

Data Sheet

12

Rev. 1.0, 2008-12-04

5

MOSFET Driver

5.1

Inputs and Dead Time

There are 6 independent control inputs to control the 6 MOSFETs individually. However, the control inputs for the

Highs Side MOSFETs IHx are inverted. Hence, the control inputs for High Side IHx and Low Side MOSFETs ILx

of the same half bridge can be tight together to control one half bridge by one control signal. To avoid shoot through

currents within the half bridges, a dead time is provided by the TLE7184F.

For more details about the dead time please see Chapter 9.2.10

5.2

Output Stages

The 3 low side and 3 high side powerful push-pull output stages of the TLE7184F are all floating blocks.

All 6 output stages have the same output power and thanks to the used bootstrap principle they can be switched

all up to high frequencies.

Each output stage has its own short circuit detection block. For more details about short circuit detection see

Chapter 9.2.11.1)

Figure 3

Block Diagram of Driver Stages including Short Circuit Detection

1) The high side outputs are not designed to be used for low side MOSFETs; the low side outputs are not designed to be used

for high side MOSFETs

GHx

SHx

VDH

+

-

Level

shifter

Floating HS driver 3x

GLx

SL

+

-

Level

shifter

Floating LS driver 3x

VREG

Voltage regulator

BHx

VREG

___

INH

VS

Error logic

Reset

Power On Reset

____

ERR

short circuit filter

SCD

SCD

SCD

Input Logic

Shoot Through

Protection

Dead Time

lock/

unlock

___

IH1

IL1

___

IH2

IL2

___

IH3

IL3

ON/ OFF

ON/ OFF

GND

DT

Short Circuit

Detection Level

____

RGS

SCDL

VDH

VREG

blanking