TLE8203EXT Infineon Technologies, TLE8203EXT Datasheet - Page 19

• Manufacturer Part Number: TLE8203EXT
• Manufacturer: Infineon Technologies

Specifications of TLE8203EXT

• Operating Temperature (max): 150C
• Operating Temperature (min): -40C
• Pin Count: 36
• Mounting: Surface Mount
• Screening Level: Automotive
• Lead Free Status / RoHS Status: Supplier Unconfirmed

8
8.1
8.1.1
The low-side switches are protected against short circuit to supply and the high-side switches against short to
GND.
If a switch is turned on and the current rises above the shutdown threshold
time
current is limited to
Figure 9
The delay time is relatively short (typ. 25 s) to limit the energy that is dissipated in the device during a short circuit.
This scheme allows high peak-currents as required in motor-applications.
The output stage stays off and the error bit set until a status register reset is sent to the SPI or a power-on reset
is performed.
8.1.2
If for instance HS4 is ON and LS4 is OFF, you can turn OFF HS4 and turn ON LS4 with the same SPI command.
To ensure that there is no overlap of the switching slopes that would lead to a cross current, the dead-time H to L
and L to H is specified.
In the control registers, it is also possible to turn ON high- and low-side switches of the same half-bridge (e.g.
LS4ON = H and HS4ON = H). To prevent a cross-current through the bridge, such a command is not executed.
Instead, both switches are turned OFF and the Over-Load bit is set High for both switches (e.g. LS4OvL = H and
HS4OvL = H).
8.1.3
Open-load detection in ON-state is implemented in the low-side switches of the bridge outputs: When the current
through the low side transistor is lower than the reference current
detection delay time
ON. The open load error bit is latched and can be reset by the SPI status register reset or by a power-on reset.
As an example, if a motor is connected between outputs OUT 4 and OUT 5 with a broken wire as shown in
Figure
Final Data Sheet
t
dSD
10, the resulting diagnostic information is shown in
, the output transistor is turned off and the corresponding diagnosis bit is set. During the delay time, the
Power-Outputs 4-6 (Bridge Outputs)
Protection and Diagnosis
Short Circuit of Output to Ground or
Short Circuit Protection
Cross-Current
Open Load
I
SC
t
OUTx
dOC
as shown in
, the according open-load diagnosis bit is set. The output transistor, however, remains
short to Vs
short to GND
Figure
9.
I
O UT
I
I
SD
SC
19
Table
V
s
6.
I
OCD
t
dSD
in ON-state for longer than the open-load
Power-Outputs 4-6 (Bridge Outputs)
I
SD
for longer than the shutdown delay
t
Rev. 1.0, 2009-02-04
TLE 8203E