TLE7240SL Datasheet, PDF (18/28 Pages) Infineon Technologies AG – 8 Channel Protected Low-Side Relay Switch

SPI Driver for Enhanced Relay Control
SPIDER - TLE 7240SL
Diagnosis Features
7
Diagnosis Features
The SPI of SPIDER - TLE 7240SL provides diagnosis information about the device and about the load. There are
following diagnosis flags implemented:
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 programming the specific channel to Standby (STB).
Failure Mode
Comment
Open Load or short circuit
to ground
Diagnosis, when channel n is switched on: none
Diagnosis, when channel n is switched off: according to voltage level at the output pin, flag OLn
is set after time t_d(OL).
When the channel is in OFF there is Diagnosis active, in Standby the Diagnosis is not enabled
Over Temperature
When over temperature occurs, the according diagnosis flag Dn is set. If the affected channel n
was active it is switched off.
The diagnosis flags are latched until they have been cleared by programming the channel STB.
Over Load
(Short Circuit)
When over load is detected at channel n, the affected channel is switched off after time t_OFF(OVL)
and the dedicated diagnosis flag Dn is set.
The diagnosis flags are latched until they have been cleared by programming the channel STB
7.1
Diagnosis Characteristics
Note: Characteristics show the deviation of parameter at given supply voltage and junction temperature. Typical
values show the typical parameters expected from manufacturing.
Electrical Characteristics: Diagnosis
All voltages with respect to ground, positive current flowing into pin
unless otherwise specified: V_DD = 3.0 V to V_DDA, V_DDA= 4.5V to 5.5V, T_j = -40 °C to +150 °C
Pos. Parameter
Symbol
Limit Values
Unit Conditions
Min. Typ. Max.
OFF State Diagnosis
7.1.1 Open load detection threshold
voltage
V_DS(OL) 1.0
2.5
V
7.1.2
Output pull-down diagnosis current I_D(PD)
per channel
80
µA
V_DS = 13.5 V
7.1.3 Open load diagnosis delay time t_d(OL)
30
ON State Diagnosis
200 µs
7.1.4
7.1.5
Over load detection current
Over load detection delay time
I_D(OVL)
0.5
t_OFF(OVL) 3
0.95 A
50
µs
Data Sheet
18
Rev. 1.1, 2009-04-15