TLE8444SL Infineon Technologies, TLE8444SL Datasheet - Page 16

• Manufacturer Part Number: TLE8444SL
• Description: IC DVR HALF-BRIDGE QUAD 24SSOP
• Manufacturer: Infineon Technologies
• Type: Half Bridger

Specifications of TLE8444SL

• Input Type: Parallel
• Number Of Outputs: 4
• On-state Resistance: 600 mOhm
• Current - Output / Channel: 1A
• Current - Peak Output: 2.4A
• Voltage - Supply: 8 V ~ 18 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

5.3
5.3.1
The EF1 and EF2 pins are open drain outputs and must be externally connected via pull-up resistors to 5V. In
normal conditions, the EF1 and EF2 signals are by default high. In case of an error, EF1 and EF2 pins are pulled
low. There are 3 different error conditions that could flag a fault condition:
5.3.1.1
Output shorted to Ground: If an output transistor is turned on and the current rises above the shutdown threshold
I
diagnosis bit is set. Within this delay time, the current is limited to I
input resets the error flag. Also a power down event will reset the Error Flag.
5.3.1.2
If the current through the low side transistor is lower than the reference current I
open-load detection delay time t
current increases and I
5.3.1.3
The Table below shows the behavior of the Error Flags:
Table 3
EF1
1
1
0
0
Data Sheet
SD
a) Output short to VS: same behavior as short to GND.
b) Short across the load: same behavior as short to GND.
a) Over voltage: For voltages below the undervoltage switch OFF threshold (V
b) Over Temperature: At a junction temperature higher than the thermal shutdown temperature T
for longer than the shutdown delay time t
overvoltage switch OFF threshold (V
only signals the overvoltage switch OFF case
thresholds to allow an autorecovery mode if the supply voltage is back within the operational range.
175°C) the device enters thermal shutdown which turns-Off all four output stages simultaneously and the
corresponding Error Flags are set with a delay. After cooling down to the thermal switch-on junction temp
T
stages will be modulated by the thermal time constants;
jSO
EF2
1
0
1
0
the device will auto restart. A thermal toggle behavior can be observed (the Error Flags and output
Monitoring Functions
Diagnostics
Overcurrent
Open load
Over voltage / over temperature
Diagnosis
Interpretation of Error
no error
overcurrent
open load
over voltage / over temperature
load
> I
OLD
d_OLD
, the Error Flag will be reset automatically after the t
, the open-load error flag is set. The output will remain ON. Once the output
OVOFF
), the output stages will be switched OFF. The Error Flag however
d_SD
, the output transistor is turned off and the corresponding
(Figure
Error Flag behavior Output status
-
latch
auto recovery
auto recovery
16
6). A switching hysteresis is implemented at both
Figure
SC
as shown in
8).
normal operation
latched switch OFF
normal operation
auto recovery
OLD
Figure
in ON-state for longer than the
UVOFF
d_OLD
) and above the
9. Changing the INHIBIT
filter time
Rev. 1.1, 2009-07-07
Block Description
TLE 8444SL
(Figure
jSD
Priority
-
2
3
1
(typ.
15).