TLE8104E Datasheet, PDF (14/27 Pages) Infineon Technologies AG – Smart Quad Channel Powertrain Switch

TLE8104E
Smart Quad Channel Powertrain Switch
Electrical and Functional Description of Blocks
5.4
Diagnostic Functions
The TLE8104E provides diagnosis information about the device and about the load. The following diagnosis
functions are implemented:
• The protective functions (flags CLn and Tn) of channel n are registered in the diagnosis flag Pn.
• The open load diagnosis of channel n is registered in the diagnosis flag OLn.
• The short to ground monitor information of channel n is registered in the diagnosis flag SGn
The diagnosis information of the TLE8104E can either be accessed by the SPI interface or FAULT pin. With the
exception of over temperature, a fault is only recognized if it lasts longer than the fault delay time t_d(fault). When
using the SPI interface and fault pin, diagnosis flags are latched in the diagnosis register of the SPI interface. In
this case, diagnosis flags are cleared by the rising edge of the CS signal after a successful SPI transmission.
Please see Figure 9 for details.
VS
SPI
CHn
MUX
00
01
10
FAULT
OR
SGn
OLn
V
DS (S G)
V_{DS (OL)}
I
DS (S G)
I
DS (P D)
gate control
OUTn
CLn
Pn OR
protective functions
Tn
GND
Figure 9 Block Diagram of Diagnostic Functions
Electrical Characteristics: Diagnostic Functions
V_S = 4.5 V to 5.5 V, T_j = -40 °C to +150 °C, (unless otherwise specified)
all voltages with respect to ground, positive current flowing into pin
Pos. Parameter
Symbol
Limit Values
Unit Conditions
Min. Typ. Max.
5.4.1
5.4.2
Open Load Detection Voltage
Output Pull-down Current
V_DS(OL)
I_PD(OL)
V_S - 2.5 V_S - 2.0 V_S - 1.3 V
50
90
150 µA
–
V_DS = 32 V ¹⁾
5.4.3
5.4.4
Short to Ground Detection Voltage V_DS(SHG) V_S - 3.3 V_S - 2.9 V_S - 2.5 V
Short to Ground Detection Current I_SHG
-150 -100 -50 µA
–
V_DS
=
V 2)
DS(SHG)
5.4.5 Fault Filtering Time
t_d(FAULT) 50
110 200 µs –
1) Channel turned off (INx, PRG, data bit, BOL), RESET =1
2) Channel turned off (INx, PRG, data bit, BOL), RESET =1 or Channel turned off (INx, PRG), RESET =0
Data Sheet
14
V1.4, 2010-04-26