TLE7209-2R_07 INFINEON [Infineon Technologies AG], TLE7209-2R_07 Datasheet - Page 7

• Manufacturer Part Number: TLE7209-2R_07
• Description: 7 A H-Bridge for DC-Motor Applications
• Manufacturer: INFINEON [Infineon Technologies AG]

2.2.2
For
I
Figure 4
2.3
The TLE 7209-2R is protected against short circuits, overload and invalid supply voltage
by the following measures:
2.3.1
The high-side switches are protected against a short of the output to ground by an over
current shut-down. If a high-side switch is turned on and the current rises above the short
circuit detection current
of 2 s, and the error bit “Short Circuit to Ground on output 1 (2)”, SCG1 (SCG2) is stored
in the internal status register.
2.3.2
Due to the chopper current regulation, the low-side switches are already protected
against a short to the supply voltage. To be able to distinguish a short circuit from normal
current limit operation, the current limitation is deactivated for the blanking time
the current has exceeded the current limit threshold
current
Figure 5). All output transistors are turned OFF and the according error bit “Short Circuit
to Battery on output 1 (2)”, SCB1 (SCB2) is set.
Data Sheet
L
= 2.5 A
T
ILR
I
OUK
<
I
Temperature-depending Current Reduction
Protection
Short circuit to Ground
Short circuit to V
L
1.1 A as shown in Figure 4
T
6.6A
2.5A
j
is reached within this blanking time, a short circuit is detected (see
Temperature dependent current reduction
A
< T
SD
the
I
OUK
current
tolerance of temperature
all output transistors are turned off after a typical filter time
dependent current
S
reduction
limit
Tj
7
decreases
T
ILR
I
L
. If the short circuit detection
from
temperature shut-down
T
SD
range of over-
I
L
Circuit Description
= 6.6 A
Rev. 1.4, 2007-04-05
TLE 7209-2R
°C
1.1 A
t
b
after
to