TLD1314EL_15 Datasheet, PDF (10/29 Pages) Marl International Limited – Basic LED Driver

5
DEN Pin
The DEN pin is a single function pin:
TLD1314EL
DEN Pin
DEN
I_DEN
V_DEN
Output Control
Figure 3 Block Diagram DEN pin
This pin is used to activate or deactivate the device internal diagnosis functions. The diagnostic functions are
described in Chapter 6.2, Chapter 7 and Chapter 8. The diagnosis is activated, if the voltage applied at the DEN
pin V_DEN is higher than V_DEN(act). The diagnosis is disabled for voltages below V_DEN(dis).
A possibility to use the DEN pin is via a Zener diode, which is connected between VS and DEN pin. A circuit
example is shown in the application information section Chapter 10.
The diagnosis is activated, if the following condition is fulfilled:
V_S ≥ V_DEN(act) + V_ZD
(1)
The current consumption on the DEN pin has to be considered for the total device current consumption. The
current is specified in Pos. 5.1.8. The typical current consumption I_DEN(H) as a function of the supply voltage V_S for
a Zener diode voltage of V_ZD = 6 V is shown in the following diagram.
160
140
120
100
80
60
40
20
0
0
Typical I_DEN=f(V_S) with (V_S-V_DEN)=6V
2
4
6
8
10
12
14
16
18
V_S [V]
Tj=-40°C
Tj=25°C
Tj=150°C
Figure 4 Typical I_DEN(H) current for a Zener diode voltage of 6V
The device and channel turn on is independent of the V_DEN-voltage. After applying a supply voltage the device is
activated after the power on reset time t_POR.
Data Sheet
10
Rev. 1.1, 2015-03-24