TLE 8444SL Infineon Technologies, TLE 8444SL Datasheet - Page 24

• Manufacturer Part Number: TLE 8444SL
• Manufacturer: Infineon Technologies

Specifications of TLE 8444SL

• Packages: PG-SSOP-24-7
• Ipeak: 4 x 0.8 A
• Inhibit: Y
• Iq (typ): 1.0 µA
• Mounting: SMT
• Technology: BCD

5.5
Dead Time to prevent Cross Currents
In bridge configurations the high-side and low-side power transistors are ensured never to be simultaneously “ON”
to avoid cross currents. This is usually assured by the integration of delays in the driver stage for the power
outputs, generating a so-called dead-time between switching off one Power Transistors while switching on the
other Power Transistor of the same half-bridge.
To ensure that there is no overlap of the switching slopes that would lead to a cross current, a dead-time t
specified. Refer to
Figure 16
Data Sheet
IOUT
no current
+
-
100
100
Vs
Vs
V
INx
x
H
L
Output Switching Capability
Switching Time Definitions
Figure 16
and the test circuit in
t
doffL
50%
t
donH
t
db
10%
90%
t
offL
t
10%
onH
90%
Figure
24
17.
10%
90%
t
doffH
50%
90%
t
10%
donL
t
db
t
offH
Rev. 1.1, 2009-07-07
t
Block Description
onL
TLE 8444SL
db
t
t
is