TLE7231GXT Infineon Technologies, TLE7231GXT Datasheet - Page 18

• Manufacturer Part Number: TLE7231GXT
• Manufacturer: Infineon Technologies

Specifications of TLE7231GXT

• Switch Type: Low Side
• Power Switch Family: TLE7231G
• Input Voltage: -0.3 to 5.5V
• Power Switch On Resistance: 1Ohm
• Output Current: 320mA
• Number Of Outputs: 4
• Mounting: Surface Mount
• Supply Current: 5mA
• Package Type: DSO
• Operating Temperature (min): -40C
• Operating Temperature (max): 150C
• Operating Temperature Classification: Automotive
• Pin Count: 24
• Lead Free Status / RoHS Status: Compliant

8
The SPI of TLE7231G provides diagnosis information about the device and about the load. The diagnosis
information of the protective functions of channel n is latched in the diagnosis flag Dn. The open load diagnosis of
channel n is latched in the diagnosis flag OLn. Both flags are cleared by INn = 00
which is a small pull down current, is disabled.
Following table shows possible failure modes and the according protective and diagnostic action.
j
8.1
The TLE7231G offers a open load diagnosis for each channel in OFF mode.
The time t
Figure 8
Datasheet
Failure Mode
Open Load
or short circuit to GND
Over temperature
Over Load
(Short Circuit)
V
DS (OL)
Open Load occures here
V
IN
DS
d(fault)
Diagnostic Features
Open Load Diagnosis timing
Open Load timing
is applied to filter short time events.
Diagnosis, when channel n is switched on:
INn = 01
INn = 10
Diagnosis, when channel n is switched off:
INn = 00
INn = 01
after time t
INn = 11
When over temperature occurs, the affected channel n is switched off. The according
diagnosis flag Dn is set.
The diagnosis flags are latched until they have been cleared by INn = 00
temperature detection is active in ON-state as well as OFF-state.
When over load is detected at channel n, the affected channel is switched off after time
t
The diagnosis flags are latched until they have been cleared by INn = 00
t
Comment
OFF(OVL)
d(fault)
and the dedicated diagnosis flag Dn is set.
OL
B
B
B
B
B
: if input pin is high: none
: none
: none, diagnosis flags are cleared and the diagnosis current is switched off
: if input pin is low, according to voltage at the output pin, the flag OLn is set
: according to voltage level at the output pin, flags OLn are set after time t
n
d(OL)
= 1
b
t
t
V
DS (OL)
V
IN
18
DS
SPI Driver for Enhanced Relay Control
Open Load occures here
B
and the diagnosis current I
SPIDER - TLE7231G
t
d(fault)
Diagnostic Features
Rev. 1.0, 2008-02-28
OL
t
B
B
t
n
. The over
.
= 1
OpenLoad .emf
b
D(PD)
d(OL)
,