TLD1313EL Datasheet, PDF (23/31 Pages) Infineon Technologies AG – 3 Channel High Side Current Source Basic LED Driver

TLD1313EL
Load Diagnosis
Note: In applications, where 1 output of the Basic LED Driver IC is not used, a zener diode can be connected to
the output to avoid unintended open load or short circuit conditions. The zener voltage should be in the range
of the LEDs’ forward voltage.
8.3
Double Fault Conditions
The TLD1313EL has an integrated double fault detection feature. This feature is implemented to detect significant
supply voltage drops. During such supply voltage drops close to the forward voltage of the LEDs the drivers
outputs remain active. In case of load faults on two or more outputs within the time period t_OL or t_SC (Pos. 8.4.9
and Pos. 8.4.12) the device disables the diagnosis to avoid any uncorrect open load diagnosis during low supply
voltages close to the forward voltages of the connected LED chains. If the faults between two or three channels
happen with a delay of longer than t_OL or t_SC the double fault detection feature is not active, i.e. the device is not
turned on.
8.4
Electrical Characteristics IN_SET Pin and Load Diagnosis
Electrical Characteristics IN_SET pin and Load Diagnosis
Unless otherwise specified: V_S = 5.5 V to 40 V, T_j = -40 °C to +150 °C, R_SET = 12 kΩ, all voltages with respect to
ground, positive current flowing into pin for input pins (I), positive currents flowing out of the I/O and output pins
(O) (unless otherwise specified)
Pos. Parameter
Symbol
Limit Values
Unit Conditions
8.4.1
8.4.2
IN_SET reference
voltage
IN_SET open load/short
circuit voltage
V_{IN_SET(ref)}
Min.
1.19
V_{IN_SET(OL/SC)} 4
Typ.
1.23
–
8.4.3 IN_SET open load/short I_{IN_SET(OL/SC)} 1.5
–
circuit current
Max.
1.27 V
5.5
V
7.4
mA
1) _{VOUTx = 3.6 V}
T_j = 25...115 °C
1) _{VS > 8 V}
T_j = 25...150 °C
V_S = V_OUTx (OL) or V_OUTx
= 0 V (SC)
1) _{VS > 8 V}
T_j = 25...150 °C
V_{IN_SET} = 4 V
V_S = V_OUTx (OL) or V_OUTx
= 0 V (SC)
8.4.4
ST device turn on
threshold (active low) in
case of voltage applied
from external (ST-pin
acting as input)
V_ST(L)
0.8
–
–
V
–
8.4.5
ST device turn off
threshold (active low) in
case of voltage applied
from external (ST-pin
acting as input)
V_ST(H)
–
–
2.5
V
–
8.4.6 ST pull down current
I_ST(PD)
–
–
15
µA
V_EN = 5.5 V
V_ST = 0.8 V
Data Sheet
23
Rev. 1.0, 2013-08-08