TLE7184F Datasheet, PDF (12/35 Pages) Infineon Technologies AG – System IC for B6 motor drives

TLE7184F
MOSFET Driver
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⁾
____
ERR
____
RGS
___
IH1
_I _L_1
IH2
I L2
___
IH3
I L3
DT
___
VS
INH
VREG
Voltage regulator
Error logic
Reset
Power On Reset
lock /
u n lo ck
VREG
VDH
SCD
Input Logic
Shoot Through
P rotecti on
Dead Time
ON/ OFF
ON/ OFF
short circuit filter
bl anki ng
SCD
SCD
Short Circuit
Detection Level
Level
shi fter
Level
shi fter
SCDL
VDH
BHx
+
-
V_SCP
GHx
Floating HS driver 3x
VREG
SHx
+
-
V_SCP
GLx
Floating LS driver 3x
SL
GND
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
Data Sheet
12
Rev. 1.0, 2008-12-04